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1. Open Magnetic Fields in the Martian Magnetosphere Revealing Dipole-like Intrinsic Magnetic Fields at Mars

Author

Shaosui Xu, Janet G. Luhmann, David L. Mitchell, Tristan Weber, David A. Brain, Yingjuan Ma, Shannon M. Curry, Gina A. DiBraccio, Jasper Halekas, Suranga Ruhunusiri, Christian Mazelle, Robert J. Lillis, and Benoit Langlais

Subjects
Mars, Solar-planetary interactions, Magnetic fields, Interplanetary magnetic fields, Magnetic anomalies, Astrophysics, QB460-466
Abstract

Mars’s magnetosphere is hybrid, having contributions from both an induced magnetosphere like Venus and the localized crustal magnetic fields. However, the planetary fields also include large-scale, more global components. In this study, we investigate their role in Mars’s magnetospheric topological responses to the interplanetary magnetic field (IMF) clock angle using observations from the Mars Atmospheric Volatile and EvolutioN mission. We show that the large-scale planetary field has a “dipole-like” influence on the Mars global magnetosphere by examining the open field topology. We find that the “dipole-like” planetary field, as at Earth, results in a more open magnetosphere during southward IMF. The clock angle effects on the twisted magnetotail current sheet are similarly consistent with this analogy. It reinforces the idea that Mars’s magnetosphere and solar wind interaction are more Earth-like than previously thought.

Published
2023
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8. Updated Spherical Harmonic Magnetic Field Moments of Ganymede From the Juno Flyby

Author

Tristan Weber, Kimberly Moore, John Connerney, Jared Espley, Gina DiBraccio, and Norberto Romanelli

Subjects
Geophysics, General Earth and Planetary Sciences
Abstract

In this study, we use data from the Juno and Galileo spacecraft to analyze the internal magnetic dynamo of Ganymede. As the only known moon with a strong internal magnetic field, Ganymede is a uniquely interesting object in the context of understanding the formation and structure of planetary magnetospheres. Using a spherical harmonic model centered on the moon, we report a dipole approximation for Ganymede of (g_0)^1 = 716.4 nT, (g_1)^1 = 56.0 nT, and (h_1)^1 = 27.0 nT. We find that using a quadrupole fit rather than a dipole fit provides only a marginal increase in accuracy and instead favor the use of a dipole approximation until more data can be obtained. The magnetic moment estimates provided here can be used as a baseline for interpreting data from future spacecraft flybys of the moon, and can serve as inputs into numerical models studying Ganymede's magnetosphere.

Published
2022
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9. Auroral electrons at Mars: upstream drivers and ionospheric impact

Author

Shaosui Xu, David Mitchell, James McFadden, Christopher Fowler, Gwen Hanley, Tristan Weber, David Brain, Gina DiBraccio, Michael Liemohn, Robert Lillis, Jasper Halekas, Suranga Ruhunusiri, Christian Mazelle, Mehdi Benna, Laila Andersson, and Shannon Curry

Abstract

Discrete aurorae have been observed at Mars by multiple spacecraft, including Mars Express, Mars Atmosphere and Volatile EvolutioN (MAVEN), and most recently the United Arab Emirates’ Hope spacecraft. Meanwhile, there have been studies on the source particle responsible for producing these detectable aurorae, that is accelerated electrons or hotter solar wind electrons (termed “auroral electrons"). By utilizing empirical criteria to select auroral electrons established by Xu et al. [2022], we conduct statistical analyses of the impact of upstream drivers on the occurrence rate and electron fluxes of auroral electrons. We find the occurrence rate is well organized and increases with upstream dynamic pressure and weakly depends on the interplanetary magnetic field strength. Meanwhile, the integrated auroral electron flux is somewhat insensitive to the upstream drivers. In the meantime, the auroral emission is not the sole effect of electrons impacting the collisional atmosphere. Auroral electrons are expected to cause significant ionization and enhance the plasma density locally. In this study, we also quantify the ionospheric impact of auroral electron precipitation, specifically the thermal ion (O+, O2+, CO2+) density enhancement, with MAVEN observations and also modeling. Our results show the ion density to increase up to 1-2 orders of magnitude at low altitudes.

Published
2022
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10. Nightside Auroral Electrons at Mars: Upstream Drivers and Ionospheric Impact

Author

Shaosui Xu, David L. Mitchell, James P. McFadden, Christopher M. Fowler, Kathleen Hanley, Tristan Weber, David A. Brain, Gina A. DiBraccio, Michael W. Liemohn, Robert J. Lillis, Jasper S. Halekas, Suranga Ruhunusiri, Laila Andersson, Christian Mazelle, Shannon M. Curry, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
auroral electrons, ionospheric impact, Geophysics, [SDU]Sciences of the Universe [physics], Space and Planetary Science, solar wind drivers, Mars, MAVEN, aurora
Abstract

International audience; Discrete aurorae have been observed at Mars by multiple spacecraft, including Mars Express, Mars Atmosphere and Volatile EvolutioN (MAVEN), and most recently the United Arab Emirates Hope spacecraft. Meanwhile, there have been studies on the source particles responsible for producing these detectable aurorae (termed "auroral electrons"). By utilizing empirical criteria to select auroral electrons established by Xu et al. (2022, https://doi.org/10.1029/2022GL097757), we conduct statistical analyses of the impact of upstream drivers on the occurrence rate and fluxes of auroral electrons. We find the occurrence rate increases with upstream dynamic pressure and weakly depends on the interplanetary magnetic field strength. Meanwhile, the integrated auroral electron flux somewhat decreases with increasing upstream drivers. Auroral electron precipitation also occurs more frequently and is more intense over regions of strong crustal fields compared to weak crustal fields. Aside from emissions, auroral electrons are expected to cause significant impact ionization and enhance the plasma density locally. In this study, we also quantify the nightside ionospheric impact of auroral electron precipitation, specifically the thermal ion (O+, O2+, and CO2+) density enhancement, with MAVEN observations. Our results show that the ion density is increased by up to an order of magnitude at low altitudes. The crustal effects on ion density profiles for nominal electron and auroral electron precipitation are also discussed.

Published
2022
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12. Exploring the solar wind-planetary interaction at Mars: Implication for Magnetic Reconnection

Author

Charles F. Bowers, Gina A. DiBraccio, James A. Slavin, Jacob R. Gruesbeck, Tristan Weber, Norberto Romanelli, Abigail R. Azari, and Shaosui Xu

Abstract

The Martian crustal magnetic anomalies create a varied, asymmetric obstacle for the draped interplanetary magnetic field (IMF) to interact with. One possible result of this interaction is magnetic reconnection, a process by which anti-parallel magnetic field lines connect and reconfigure, transferring energy into the surrounding environment and mixing previously separated plasma populations. Here, we present an analysis to determine the draped IMF conditions that favor reconnection with the underlying crustal anomalies at Mars. First, we plot a map of the crustal anomalies’ strength and orientation compiled from magnetic field data taken throughout the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission. Second, we create “shear maps” which calculate and plot the angle of shear between the transverse component of the anomalies and a chosen overlaid draping direction. Third, we define a “shear index” which quantifies the susceptibility of a particular region to undergo reconnection based on a given draped IMF orientation and the resulting shear map for that region. We then compare the shear index for a variety of draped field orientations within different regions of the Martian magnetosphere. Our results suggest eastward/westward (horizontal) draped fields present regions that are more likely for anti-parallel magnetic reconnection to occur with the crustal anomalies than northward/southward (vertical) draped fields, with one notable exception being the strongest crustal anomalies located in the southern hemisphere ~180° longitude. An east/west draped field roughly corresponds to a +/- By IMF direction on the dayside, implying the rate of magnetic reconnection on the dayside of Mars may be enhanced for IMF field lines pointing in the +/- YMSO direction compared to that of IMF field lines pointing in the +/- ZMSO direction, with MSO referring to the Mars Solar Orbital coordinate system. Understanding the interplay between Mars’s crustal magnetic fields and the IMF is crucial to answer outstanding science questions regarding nightside magnetospheric activity at Mars, namely how IMF orientation affects the twisting of the magnetotail, open magnetic topology observations on the nightside, and discrete aurora observations in the southern hemisphere.

Published
2022
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13. Empirically Determined Auroral Electron Events at Mars—MAVEN Observations

Author

Shaosui Xu, David L. Mitchell, James P. McFadden, Nicholas M. Schneider, Zachariah Milby, Sonal Jain, Tristan Weber, David A. Brain, Gina A. DiBraccio, Jasper Halekas, Suranga Ruhunusiri, Christian Mazelle, Robert J. Lillis, Ben Johnston, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
auroral electrons, Geophysics, [SDU]Sciences of the Universe [physics], Mars, MAVEN, General Earth and Planetary Sciences, aurora
Abstract

International audience; Discrete aurorae have been observed at magnetized planets such as Earth and Jupiter, triggered by accelerated electrons. Similar aurorae have also been observed at Mars with only localized strong crustal magnetisms. However, our understanding of this phenomenon at Mars is still limited. In particular, direct and quantitative comparisons of the auroral and its source electron events are lacking as these two types of observations are usually made at different times and/or locations. In this study, we establish empirical criteria to select electron events ("auroral electrons") that could trigger detectable auroral emissions with Mars Atmosphere and Volatile EvolutioN measurements, thereby enabling a direct statistical comparison. We find auroral electrons share similar statistical characteristics to those previously reported for discrete auroral events. This study bridges the gap between electron observations and auroral detections and enables collaborations across different Mars missions, as well as comparative planetary studies of discrete aurora.

Published
2022
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14. A Statistical Investigation of Factors Influencing the Magnetotail Twist at Mars

Author

Gina A. DiBraccio, Norberto Romanelli, Charles F. Bowers, Jacob R. Gruesbeck, Jasper S. Halekas, Suranga Ruhunusiri, Tristan Weber, Jared R. Espley, Shaosui Xu, Janet G. Luhmann, Yuki Harada, Eduard Dubinin, Gang Kai Poh, David A. Brain, and Shannon M. Curry

Subjects
Geophysics, General Earth and Planetary Sciences
Abstract

The Martian magnetotail exhibits a highly twisted configuration, shifting in response to changes in polarity of the interplanetary magnetic field's (IMF) dawn-dusk (BY) component. Here, we analyze ∼6000 MAVEN orbits to quantify the degree of magnetotail twisting (θTwist) and assess variations as a function of (a) strong planetary crustal field location, (b) Mars season, and (c) downtail distance. The results demonstrate that θTwist is larger for a duskward (+BY) IMF orientation a majority of the time. This preference is likely due to the local orientation of crustal magnetic fields across the surface of Mars, where a +BY IMF orientation presents ideal conditions for magnetic reconnection to occur. Additionally, we observe an increase in θTwist with downtail distance, similar to Earth's magnetotail. These findings suggest that coupling between the IMF and moderate-to-weak crustal field regions may play a major role in determining the magnetospheric structure at Mars.

Published
2022

16. The Penetration of Draped Magnetic Field Into the Martian Upper Ionosphere and Correlations With Upstream Solar Wind Dynamic Pressure

Author

Jasper Halekas, D. L. Mitchell, Janet G. Luhmann, Laila Andersson, Christopher M. Fowler, Robert E. Ergun, Shaosui Xu, Christian Mazelle, Jared Espley, Tristan Weber, Christina O. Lee, Robert Lillis, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Martian, MAVEN, Geophysics, Penetration (firestop), Magnetic field, Solar wind, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Physics::Space Physics, Dynamic pressure, Astrophysics::Earth and Planetary Astrophysics, magnetic topology, Mars ionosphere, Ionosphere, Geology, solar wind dynamic pressure
Abstract

International audience; Open and draped magnetic field topologies are important at Mars because they can provide ionospheric particles a path to escape to space. Four years of Mars Atmosphere and Volatile EvolutioN data are analyzed in this study, demonstrating that the altitude at which the ionospheric density drops below 102 cm-3 is essentially coincident with the altitude down to which open and draped magnetic field lines are observed in the ionosphere. During times of enhanced solar wind dynamic pressure, a greater fraction of the magnetic topology was observed as open or draped (as opposed to closed) above densities of 102 cm-3. The altitudes at which the ionospheric density fell below 102 cm-3, and the magnetic field topology transitioned from closed to open or draped, also decreased during higher dynamic pressure conditions. Times of enhanced solar wind dynamic pressure thus appear to drive greater penetration of draped magnetic field into the ionosphere, enhancing the rate of reconnection between draped and crustal magnetic fields and producing more open field. Such observations may have implications for the long-term evolution of the Martian ionosphere; the historic solar wind is thought to have been denser and faster than present-day conditions, and "quiet time" conditions may have been equivalent to extreme dynamic pressure events today. Depending on past atmospheric conditions at Mars, draped topology may have routinely penetrated deep into the ionosphere, and quiet time rates of ionospheric escape to space may thus have been much greater for early Mars than today.

Published
2019
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18. The influence of interplanetary magnetic field direction on Martian crustal magnetic field topology

Author

Jasper Halekas, David Brain, Tristan Weber, Bruce M. Jakosky, Shaosui Xu, Robert Lillis, Gina A. DiBraccio, Jared Espley, Christian Mazelle, D. L. Mitchell, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Martian, electron, Magnetosphere, Mars, ionosphere, Geophysics, Electron, Mars Exploration Program, Magnetic field, Physics::Geophysics, [SDU]Sciences of the Universe [physics], Physics::Space Physics, magnetosphere, General Earth and Planetary Sciences, Astrophysics::Earth and Planetary Astrophysics, magnetic topology, Ionosphere, Interplanetary magnetic field, IMF, Topology (chemistry)
Abstract

International audience; Crustal magnetic fields influence a range of plasma processes at Mars, guiding the flow of energy from the solar wind into the planet's atmosphere at some locations while shielding the atmosphere at others. In this study we investigate how the topology of crustal fields varies with changes in the direction of the incoming interplanetary magnetic field (IMF). Using plasma measurements from Mars Atmosphere and Volatile Evolution (MAVEN) and Mars Global Surveyor (MGS), we identify magnetic topology throughout the Martian ionosphere and perform a statistical analysis of crustal magnetic field topology during different IMF configurations. We find that the topology of crustal field cusp regions is dependent on IMF direction and that cusps transition between open and closed topology regularly as they rotate through the nightside of Mars. Finally, we determine that cusps often become topologically closed due to reconnection with open magnetic fields in the Martian magnetotail, creating large closed loops that connect the dayside and nightside of Mars.

Published
2021
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20. Search for the reaction channel e+e−→ηcηπ+π− at center-of-mass energies from 4.23 to 4.60 GeV

Author

J. H. Zou, X. L. Ji, S. S. Sun, Z. Y. Zhang, Y. G. Xie, M. H. Ye, Li Zhou, R. E. Mitchell, R. Kappert, Z. L. Dou, M. Qi, L. Koch, A. Khoukaz, Y. Fu, M. M. Ma, H. J. Yang, L. Y. Dong, R. Baldini Ferroli, Y. H. Yan, Bibo Ke, J. Chai, W. B. Yan, S. Pacetti, Krisztian Peters, S. Malde, N. Huesken, M. Z. Wang, Y. Schelhaas, M. Kuessner, Ke Li, R. Kliemt, G. X. Sun, J. V. Bennett, Li Yan, A. Mangoni, A. Guskov, G. A. Chelkov, F. F. Sui, S. L. Yang, G. R. Liao, X. N. Ma, J. Libby, G. F. Xu, S. Jin, L. J. Wu, Y. J. Mo, J. W. Zhao, Y. C. Zhu, M. Bertani, L. Yang, Z. Jiao, D. H. Zhang, B. Wang, H. R. Qi, Q. Q. Song, Xujin Yuan, Jie Yu, M. H. Gu, R. Kiuchi, X. N. Li, Haiping Peng, M. Kuemmel, Matthew Glenn Kurth, M. Fritsch, M. Kavatsyuk, Y. P. Guo, Xiao-Rui Lyu, S. B. Liu, Y. Nefedov, Zongyuan Wang, T. J. Min, K. J. Zhu, J. C. Li, Q. Liu, Serkant Ali Cetin, X. Y. Song, C. Sowa, Y. B. Zhao, W. Shan, J. Dong, Y. H. Xie, Xiang-Gan Liu, Q. P. Ji, H. J. Lu, J. G. Lu, P. Kiese, Yuan Hou, Yaquan Fang, M. Greco, Shou-hua Zhu, X. F. Cui, G. Cibinetto, P. W. Luo, Tristan Weber, Y. T. Tan, Ke Wang, X. Tang, H. Y. Sheng, M. Maggiora, Ling Zhao, W. Gradl, Y. H. Zheng, B. X. Zhang, F. E. Maas, I. R. Boyko, Liqing Xu, S. Nisar, G. S. Huang, L. L. Ma, M. G. Zhao, Y. H. Yang, L. Gong, X. X. Ma, S. Qian, Q. An, Jialun Ping, Lei Zhao, Z. L. Hou, R. P. Guo, J. Zhu, J. Zhuang, J. Min, Zhang Li, W. J. Zhu, M. X. Luo, T. Hu, Magnus Wolke, R. A. Briere, K. Zhang, X. Y. Zhang, J. J. Xu, T. Held, Z. Q. Yang, J. Bloms, X. D. Shi, Dan Wang, C. J. Tang, I. B. Nikolaev, L. G. Xia, Y. Hu, P. L. Wang, X. Y. Shen, Y. F. Liang, A. Amoroso, S. Gu, R. Poling, F. H. Heinsius, Y. P. Lu, X. L. Wang, J. H. Yin, H. B. Liu, X. L. Li, Meng Wang, B. Kopf, O. Bakina, M. Rolo, D. P. Jin, D. V. Dedovich, Xu Zhou, V. Rodin, X. S. Jiang, J. S. Huang, J. F. Sun, Q. Ouyang, J. B. Liu, C. X. Liu, C. Z. Yuan, N. Cao, K. L. He, A. Dbeyssi, Muhammad Irshad, Fenfen An, Y. J. Sun, Yifan Yang, S. W. Han, K. Schoenning, Q. Y. Li, B. S. Zou, M. Shao, Y. T. Gu, S. Marcello, Y. Ding, B. L. Wang, B. J. Liu, X. P. Xu, X. B. Ji, T. Y. Xing, D. Y. Chen, P. Patteri, Y. Zeng, Y. J. Lin, Zhe Sun, N. Qin, S. Lusso, Jimin Zhao, P. X. Shen, Z. G. Wang, Z. Wu, S. S. Fang, H. Y. Zhang, Angelo Rivetti, P. L. Li, R. X. Yang, Wei Xu, A. Pitka, C. X. Yu, P. Adlarson, T. C. Zhao, F. Cossio, Q. A. Malik, G. Mezzadri, C. F. Redmer, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, D. Y. Liu, J. B. Jiao, F. De Mori, J. J. Song, I. Uman, G. Wilkinson, W. C. Yan, K. Goetzen, W. S. Cheng, Zhiqing Zhang, W. Kühn, Yao Zhang, G. Li, L. Sun, Z. Y. You, Z. A. Zhu, Z. Gao, Jun-Yi Zhang, H. B. Li, S. L. Niu, Y. B. Liu, F. A. Harris, W. L. Chang, G. F. Chen, C. L. Luo, Tao Luo, Q. Zhou, F. Feldbauer, Cong-Feng Qiao, B. Zheng, R. G. Ping, C. D. Fu, C. Q. Feng, J. Y. Zhang, C. C. Zhang, Feng Liu, Y. F. Long, K. Ravindran, Z. P. Zhang, H. Leithoff, B. Zhong, L. B. Guo, M. Ablikim, X. Y. Jiang, M. Albrecht, Yunlong Zhang, Lei Li, L. M. Gu, M. N. Achasov, F. Li, Z. Y. Deng, N. Yu. Muchnoi, Z. J. Xiao, Huanhuan Liu, B. X. Yu, G. Felici, M.G. Alekseev, M. Richter, L. P. Zhou, Y. M. Ma, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, W. D. Li, H. W. Wen, A. N. Zhu, Tao Zhang, F. C. Ma, Z. P. Mao, X. S. Kang, Y. H. Zhang, X. F. Wang, B. T. Tsednee, Shulei Zhang, Zujian Wang, Q. M. Ma, Z. Ning, S. Y. Xiao, S. L. Olsen, D. Bettoni, J. L. Zhang, Y. K. Heng, Yi Zhang, A. Mustafa, F. Y. Li, H. S. Chen, Alperen Yuncu, Xu Shan, S. J. Zhao, J. Fang, H. L. Jiang, S. Q. Qu, Z. B. Li, Jianping Zheng, J. Q. Zhang, Z. Y. Wang, Teresa Lenz, C. P. Shen, H. L. Dai, T. Liu, J. F. Qiu, M. Papenbrock, J. D. Lu, Xiaozhong Huang, Y. Q. Wang, W. Ikegami Andersson, Y. Yuan, Y. S. Zhu, Yu Zhang, W. Imoehl, Y. F. Wang, L. Fava, A. Calcaterra, Z. G. Zhao, L. Z. Liao, Q. J. Xu, X. H. Liu, F. Nerling, Yu Bai, J. C. Chen, Ch. Rosner, Xuanhong Lou, H. H. Zhang, Viktor Thorén, Z. J. Sun, X. T. Huang, X. H. Mo, L. S. Wang, T. Hussain, G. Rong, Andrzej Kupsc, H. J. Li, J. P. Dai, X. H. Li, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, Yang Zhang, S. Maldaner, Z. X. Meng, X. A. Xiong, X. Y. Ma, M. L. Chen, I. Balossino, W. X. Gong, H. Liang, A. A. Zafar, Q. L. Xiu, Xingchao Dai, E. M. Gersabeck, X. K. Zhou, L. L. Wang, H. Cai, K. H. Rashid, C. H. Li, X. H. Sun, Jacek Biernat, Y. T. Liang, S. J. Chen, X. L. Luo, Ke Liu, L. H. Wu, M. Savrie, Yi Jin, J. W. Li, Lingxuan Zhang, R. M. Wang, Y. J. Xiao, K. Begzsuren, W. P. Wang, F. Bianchi, X. P. Qin, Zhiqing Liu, L. Y. Liu, Z. A. Liu, T. Johansson, J. F. Chang, V. Prasad, O. B. Kolcu, Y. Ban, P. Weidenkaff, S. P. Wen, X. Cai, L. Lavezzi, X. S. Qin, X. R. Zhou, Cheng Li, G. Y. Tang, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, F. H. Liu, Nicolas Berger, J. W. Zhang, T. Y. Qi, M. Himmelreich, Y. X. Xia, T. Yu, Y. G. Gao, X. Q. Hao, S. Nakhoul, P. Larin, J. Y. Liu, Q. Gao, Y. N. Gao, Y. Zhang, Feng Yan, J. Z. Fan, S. Ahmed, Y. X. Yang, Q. Zhao, Y. Z. Sun, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, R. Farinelli, H. L. Ma, D. M. Li, A. Q. Guo, C. W. Wang, H. Muramatsu, M. Pelizaeus, Z. H. Qin, X D Shi, Y. J. Mao, H. X. Yang, I. Garzia, B. Garillon, Huihui Liu, J. G. Messchendorp, W. G. Li, A. G. Denig, Y. K. Sun, Xiaoyu Zhou, S. Spataro, H. M. Liu, J. F. Hu, G. F. Cao, S. X. Du, K. Y. Liu, Fang Liu, U. Wiedner, I. Denysenko, B. Y. Zhang, M. Destefanis, X. L. Gao, C. Dong, S. Sosio, Joachim Pettersson, and M. Y. Dong

Subjects
Nuclear physics, Physics, Positron, Meson, law, Center of mass, Electron, Collider, Energy (signal processing), law.invention
Abstract

Using data collected with the BESIII detector operating at the Beijing Electron Positron Collider, we search for the process $e^+e^-\rightarrow \eta_c\eta \pi^+\pi^-$. The search is performed using five large data sets recorded at center-of-mass energies of 4.23, 4.26, 4.36, 4.42, and 4.60 GeV. The $\eta_c$ meson is reconstructed in 16 exclusive decay modes. No signal is observed in the $\eta_c$ mass region at any center-of-mass energy. The upper limits on the reaction cross sections are determined to be 6.2, 10.8, 27.6, 22.6 and 23.7 pb at the 90% confidence level at the center-of-mass energies listed above.

Published
2021
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21. Martian Crustal Field Influence on O+ and O2+ Escape as Measured by MAVEN

Author

David Brain, Bruce M. Jakosky, Christian Mazelle, Jared Espley, Tristan Weber, James P. McFadden, D. L. Mitchell, Shaosui Xu, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Martian, Atmospheric escape, Field (physics), Astrophysics::High Energy Astrophysical Phenomena, Mars, MAVEN, ionosphere, Mars Exploration Program, crustal magnetic fields, ion escape, Astrobiology, Physics::Geophysics, Geophysics, Space and Planetary Science, [SDU]Sciences of the Universe [physics], Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Ionosphere, atmospheric escape, Geology
Abstract

International audience; Martian crustal magnetic fields influence the solar wind interaction with Mars in a way that is not fully understood. In some locations, crustal magnetic fields act as "mini-magnetospheres," shielding the planet's atmosphere, while in other locations they act as channels for enhanced energy input and particle escape. The net effect of this system is not intuitively clear, but previous modeling studies have suggested that crustal fields likely decrease global ion escape from Mars. In this study, we use data from the Mars Atmosphere and Volatile EvolutioN spacecraft to analyze how crustal magnetic fields influence both global and local ion escape at Mars. We find that crustal fields only increase ion escape if ions are not bound tightly to the magnetic field. Specifically, ion escape is increased only if closed magnetic fields trap 35% or less of energized oxygen ions. In any other case, crustal fields decrease both global and local ion escape by as much as 40% and 80%, respectively. This suggests that the presence of crustal magnetic fields has had a moderate impact on atmospheric ion loss throughout Martian history, potentially influencing the planet's atmospheric evolution and habitability.

Published
2021
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22. The Influence of Magnetic Field Topology and Orientation on the Distribution of Thermal Electrons in the Martian Magnetotail

Author

Tristan Weber, Murti Nauth, Shaosui Xu, D. L. Mitchell, Laila Andersson, Gina A. DiBraccio, and Christopher M. Fowler

Subjects
Electron density, 010504 meteorology & atmospheric sciences, Population, FOS: Physical sciences, Electron, Topology, 01 natural sciences, Physics - Space Physics, education, 0105 earth and related environmental sciences, Physics, Martian, Earth and Planetary Astrophysics (astro-ph.EP), education.field_of_study, Mars Exploration Program, Atmosphere of Mars, Physics - Plasma Physics, Space Physics (physics.space-ph), Magnetic field, Plasma Physics (physics.plasm-ph), Geophysics, Space and Planetary Science, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, Ionosphere, Astrophysics - Earth and Planetary Astrophysics
Abstract

Thermal (, 10 pages, 7 figures

Published
2021
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23. Global Ambipolar Potentials and Electric Fields at Mars Inferred From MAVEN Observations

Author

Shaosui Xu, David L. Mitchell, Yingjuan Ma, Tristan Weber, David A. Brain, Jasper Halekas, Suranga Ruhunusiri, Gina DiBraccio, Christian Mazelle, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Sun-Mars interaction, Geophysics, Space and Planetary Science, particle acceleration, solar wind electrons, [SDU]Sciences of the Universe [physics], ambipolar electric field, MAVEN, ion escape
Abstract

International audience; The motion of charged particles is governed by electromagnetic forces at high altitudes at Mars and thus the characterization of electrostatic potential and electric fields is important for understanding ion escape at Mars. In this study, we utilize measurements from the Mars Atmosphere and Volatile EvolutioN mission to derive electrostatic potentials above the collisional atmosphere at Mars. We find averaged potentials to be up to ∼100 V in the magnetosheath and down to ∼-70 V in the tail, with respect to the upstream. We then derive electric fields based on averaged potential maps, ranging ∼0.01-0.1 V/km. These data-derived electric fields are in good agreement with ambipolar electric fields from a multi-fluid magnetohydrodynamic (MHD) model. MHD results also reveal that these large electric fields mainly originate from the electron pressure gradient in the magnetosheath and in the transition region from the hot solar wind flow to the cold ionospheric flow. This work provides the first data-based characterization of global ambipolar electric fields at Mars (outside of the main ionosphere).

Published
2021
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24. Measurement of cross sections for e+e−→μ+μ− at center-of-mass energies from 3.80 to 4.60 GeV

Author

Z. A. Liu, V. Prasad, Ma R. T., Y. Ban, P. Weidenkaff, Y. H. Zheng, Cong-Feng Qiao, G. Felici, S. P. Wen, X. S. Qin, X. R. Zhou, N. Yu. Muchnoi, Xu G. F., X. S. Kang, Y. H. Zhang, S. L. Olsen, Ma X. X., Mo X. H., Z. Y. Wang, Teresa Lenz, Meng Wang, L. Wollenberg, L. Y. Dong, A. G. Denig, Muhammad Irshad, Y. K. Sun, F. Feldbauer, Z. L. Huang, Xingchao Dai, M. Ablikim, A. Calcaterra, Z. G. Zhao, X. Y. Jiang, L. Z. Liao, Yu B. X., S. Spataro, Li H. B., Yu Bai, H. H. Zhang, F. A. Harris, W. L. Chang, M. Lellmann, Lingxuan Zhang, Y. X. Tan, H. Leithoff, Li J. Q., X. P. Qin, S. Maldaner, J. Q. Zhang, S. Qian, Q. An, Jialun Ping, Liangbin Li, X. Y. Zhang, X. L. Wang, J. B. Liu, C. L. Luo, Y. J. Sun, F. Li, G. Y. Tang, X. H. Xie, H. M. Liu, Q. Zhou, G. F. Cao, B. Zhong, L. B. Guo, Jie Zhao, A. N. Zhu, Tao Zhang, Ma F. C., Alexey Zhemchugov, F. F. Sui, C.-H. Rosner, E. M. Gersabeck, F. H. Liu, S. Ahmed, Y. X. Yang, T. Z. Han, Li P. R., G. Wilkinson, Y. Fu, Xu Q. J., J. W. Zhang, Xu Shan, H. H. Liu, Wu L. H., R. Kiuchi, Yao Wang, Ke B. C., X. L. Luo, Y. C. Zhu, W. S. Cheng, T. Liu, J. F. Qiu, Y. F. Wang, Wu L. J., M. Kuemmel, Matthew Glenn Kurth, H. Xiao, A. Q. Guo, C. W. Wang, M. Papenbrock, T. Held, Y. Schelhaas, Fu C. D., L. Fava, Zhi Yang, Z. Ning, S. Y. Xiao, Ma Y. M., Y. X. Zhao, M. X. Luo, Dylan Jaide White, H. B. Liu, B. Zheng, R. G. Ping, K. Begzsuren, G. Li, B. Kopf, M. H. Ye, F. Nerling, T. Hussain, R. S. Shi, W. P. Wang, D. V. Dedovich, Li Z. B., H. R. Qi, Q. Q. Song, F. Bianchi, Y. P. Guo, L. L. Wang, H. Cai, X. Q. Hao, Y. H. Xie, W. X. Gong, F. E. Maas, B. Wang, S. Nakhoul, T. Hu, C. Q. Feng, X. R. Chen, M. Maggiora, S. W. Han, S. Jaeger, Q. Zhao, X. F. Cui, Y. Z. Sun, Serkant Ali Cetin, Y. Ding, L. Q. Huang, Z. Y. Deng, Hai-Tian Wang, M. Fritsch, J. M. Zhang, Gu M. H., M. Kavatsyuk, Zujian Wang, Jacek Biernat, P. Larin, A. Pathak, H. C. Shi, Gu L. M., B. J. Liu, Ma X. N., Z. L. Hou, O. Bakina, T. Y. Xing, D. Y. Chen, Jimin Zhao, Z. H. Qin, X D Shi, I. K. Keshk, C. X. Lin, Ye M. H., D. Y. Liu, L. Y. Liu, W. Imoehl, X. K. Zhou, C. F. Redmer, J. B. Jiao, X. H. Liu, L. Q. Qin, B. X. Zhang, Xujin Yuan, C. H. Li, Ma Q. M., W. Kühn, I. B. Nikolaev, M. Rump, Gang Zhao, Z. Y. You, Z. A. Zhu, R. Kliemt, J. H. Yin, P. X. Shen, Lu H. J., M. Shao, Z. Wu, C. X. Yue, Gu Y. T., Y. J. Mao, H. X. Yang, I. Garzia, J. P. Dai, G. S. Huang, A. Mangoni, M. Qi, Ji Q. P., A. Guskov, S. B. Liu, H. J. Yang, Y. Nefedov, Qi T. Y., M. Himmelreich, Wu J. F., Y. F. Long, T. Holtmann, K. Ravindran, J. Y. Liu, W. J. Zhu, X. D. Shi, Dan Wang, S. Gu, C. Z. Yuan, N. Cao, F. Weidner, T. Yu, Xu J. J., Lu X. L., Ji X. L., Du S. X., C. P. Shen, X. Wu, T. J. Min, K. J. Zhu, G. Cibinetto, G. X. Sun, J. V. Bennett, Li Yan, J. G. Messchendorp, W. L. Yuan, Q. Ouyang, Z. Jiao, Wenbin Qian, S. L. Yang, A. Sarantsev, D. H. Wei, J. S. Lange, S. S. Fang, C. Y. Guan, K. Y. Liu, Li H. J., Ma X. Y., Y. G. Gao, W. Ikegami Andersson, P. W. Luo, Ma R. Q., Y. N. Gao, Qi H. R., Y. B. Zhao, Y. Zhang, Y. B. Liu, M. Bertani, L. Yang, W. Shan, J. B. Zhao, P. Kiese, Yuan Hou, J. Dong, Mo Y. J., Zhiqing Zhang, Q. P. Ji, M. Kuessner, I. R. Boyko, Li Z. Y., H. B. Jiang, S. Nisar, Ji X. B., R. A. Briere, C. J. Tang, Y. Hu, Y. P. Lu, Li X. L., X. S. Jiang, S. H. Zhang, X. Y. Shen, W. Gradl, Tao Sun, V. Rodin, G. A. Chelkov, Y. X. Song, Xu X. P., P. Patteri, Lu J. G., R. Farinelli, R. X. Yang, Wei Xu, J. F. Sun, A. Pitka, P. Adlarson, S. Marcello, Y. Zeng, M. Pelizaeus, Zhe Sun, S. Lusso, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, J. J. Song, L. Sun, T. Johansson, J. F. Chang, O. B. Kolcu, X. Cai, L. Lavezzi, H. Y. Zhang, R. B. de Boer, Li L. K., G. F. Chen, J. Y. Zhang, H. W. Wen, Li J. L., Y. K. Heng, T. T. Han, S. J. Zhao, Li P. L., A. Bortone, Xuanhong Lou, Viktor Thorén, Nasser Kalantar-Nayestanaki, Yue Pan, I. Balossino, Hu H. M., Qu S. Q., Yu C. X., Li D. M., M. G. Zhao, Y. H. Yang, R. P. Guo, J. Zhu, M. Savrie, Yi Jin, Y. J. Xiao, Ma M. M., S. Janchiv, C. Zhong, C. Schnier, Y. Q. Wang, Li X. H., X. T. Huang, Ma H. L., G. Rong, Yu J. S., Z. X. Meng, X. A. Xiong, A. A. Zafar, K. H. Rashid, Y. T. Liang, S. J. Chen, K. J. Li, Andrzej Kupsc, M. L. Chen, Magnus Wolke, Y. F. Liang, Fang Liu, Li W. G., U. Wiedner, I. Denysenko, I. Uman, Guangyi Zhang, Z. J. Xiao, W. B. Yan, S. Pacetti, N. Huesken, M. Y. Dong, J. H. Zou, S. S. Sun, R. E. Mitchell, Q. Liu, Tristan Weber, L. Gong, L. G. Xia, A. Amoroso, A. Dbeyssi, Angelo Rivetti, F. De Mori, He K. L., L. D. Liu, Hu J. F., X. F. Wang, C. X. Liu, R. Kappert, S. Jin, Anita, Y. Yuan, K. Goetzen, Li S. Y., M. Albrecht, B. T. Tsednee, Ke Wang, W. Y. Sun, F. H. Heinsius, Lu J. D., B. L. Wang, Ma L. L., H. Liang, L. Koch, A. Khoukaz, R. Baldini Ferroli, Li W. D., Krisztian Peters, S. Malde, M. Z. Wang, Lu Y. P., Haiping Peng, Tao Luo, J. Libby, Shulei Zhang, H. S. Chen, Alperen Yuncu, H. L. Dai, Li C. H., Yaquan Fang, M. Greco, Shou-hua Zhu, John Jake Lane, Guoqiang Yu, K. Schoenning, B. S. Zou, Q. A. Malik, G. Mezzadri, W. C. Yan, Zhiqiang Liu, M. N. Achasov, L. Zhao, L. P. Zhou, Xiao-Rui Lyu, Z. P. Mao, J. Fang, J. Bloms, Z. Y. Zhang, Y. G. Xie, X. L. Gao, C. Dong, S. Sosio, Y. Yang, Joachim Pettersson, J. Tang, Yunlong Zhang, D. Bettoni, J. L. Zhang, Jianping Zheng, M. Destefanis, M. Rolo, and F. Cossio

Subjects
Nuclear physics, Physics, 010308 nuclear & particles physics, law, 0103 physical sciences, Detector, Measure (physics), Center of mass, 010306 general physics, Collider, 01 natural sciences, law.invention
Abstract

The observed cross sections for e(+)e(-) -> mu(+) mu(-) at energies from 3.8 to 4.6 GeVare measured using data samples taken with the BESIII detector operated at the BEPCII collider. We measure ...

Published
2020
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25. MAVEN observations of factors influencing the magnetotail twist at Mars

Author

Jasper Halekas, Tristan Weber, Suranga Ruhunusiri, Jared Espley, Jacob Gruesbeck, Gina A. DiBraccio, Janet G. Luhmann, David Brain, Norberto Romanelli, John E. P. Connerney, Shaosui Xu, and Gangkai Poh

Subjects
Mars Exploration Program, Twist, Geology, Astrobiology
Abstract

At Mars, recent studies based on a combination of MAVEN data and modeling have determined the Martian magnetotail exhibits a ~45° twist, either clockwise or counterclockwise from the ecliptic plane, away from the nominal interplanetary magnetic field (IMF) draping morphology. An initial study by DiBraccio et al. [2018] employed MAVEN magnetic field measurements, coupled with MHD simulations, to indicate that the twist is likely a result of the sun-planetary interaction. Now with several more years of MAVEN data available, we augment this work using a statistical analysis of MAVEN magnetic field data from November 2014 through November 2019. We utilized ~6000 orbits, requiring that MAVEN observed both the magnetotail and the upstream IMF over a given orbit. For periods when the upstream IMF measurements were not available due to MAVEN’s orbit precession, we utilize an IMF proxy to determine characteristics of the upstream orientation. The location of the magnetotail lobes, identified in the data as the regions of magnetic field behind the planet directed towards and away from Mars, are analyzed as a function of the upstream IMF dawn-dusk component. In the previous DiBraccio et al. [2018] study, this dawn-dusk component was found to be the separating factor in the direction of magnetotail twisting. To quantify the degree of tail twisting for a given scenario, we determine the vector between the center of the towards/away tail lobes and calculate the angle between this vector and the expected direction for nominal IMF draping. This calculated tail twist angle is then assessed as a function of a variety of factors including strong crustal field location, Mars season, and downtail distance. In all cases, we determine that the degree of tail twisting is larger when the IMF is oriented in the duskward direction, suggesting enhanced coupling between the IMF and planetary crustal fields. Furthermore, we demonstrate that the degree of tail twisting exhibits different trends for crustal field orientation under dawnward versus duskward IMF configurations. Seasonal variations indicate that tail twisting may vary over the course of the Martian year, but additional data are needed during the northern fall and winter periods for confirmation. Finally, when assessing the tail twist with downtail distance we find that the degree of twisting increases with distance from the planet. This result is similar to Earth where observations of the magnetotail twist increases away from the planet as the torque exerted by the IMF on the planetary field increases. From these findings we confirm that the tail twist at Mars is likely a result of the direct interaction between the IMF and the planetary crustal fields; however, we find evidence suggesting that the degree of twisting is larger for duskward IMF orientations. This implies that magnetic reconnection on the dayside of Mars, between the IMF and crustal fields, may be favorable under specific IMF configurations.

Published
2020
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26. Variations in Nightside Magnetic Field Topology at Mars

Author

Shaosui Xu, Jasper Halekas, David Brain, Bruce M. Jakosky, D. L. Mitchell, Jared Espley, Robert Lillis, and Tristan Weber

Subjects
Geophysics, General Earth and Planetary Sciences, Magnetosphere, Mars Exploration Program, Topology (chemistry), Geology, Computational physics, Magnetic field
Published
2020
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28. First measurements of χcJ→Σ−Σ¯+(J=0,1,2) decays

Author

X. Wu, J. Tang, Bibo Ke, G. Wilkinson, Y. J. Mo, W. S. Cheng, Yao Zhang, G. Li, W. B. Yan, M. M. Ma, L. H. Wu, S. Pacetti, C. D. Fu, M. Savrie, Yunlong Zhang, C. Q. Feng, Zongyuan Wang, X. R. Chen, N. Huesken, Q. Liu, D. Bettoni, Tristan Weber, Yi Jin, Z. Y. Deng, Y. H. Tan, X D Shi, G. X. Sun, J. V. Bennett, Li Yan, J. L. Zhang, F. Li, F. C. Ma, Y. J. Xiao, Hai-Tian Wang, F. Weidner, Ke Li, Jianping Zheng, L. L. Ma, L. Gong, W. L. Yuan, Q. Ouyang, Xingguo Li, Xiao-Rui Lyu, S. Janchiv, J. Q. Li, Q. P. Ji, M. Kuessner, J. Bloms, Y. J. Mao, P. Kiese, Yuan Hou, I. R. Boyko, Z. Jiao, Z. A. Liu, S. S. Fang, C. Y. Guan, H. X. Yang, L. G. Xia, A. Amoroso, R. A. Briere, X. L. Ji, Y. B. Liu, V. Prasad, M. H. Ye, S. H. Zhang, X. Y. Shen, S. X. Du, Z. X. Meng, K. Y. Liu, X. A. Xiong, Y. Ban, Z. Y. Zhang, G. S. Huang, E. M. Gersabeck, I. Garzia, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, X. S. Jiang, A. Dbeyssi, P. Weidenkaff, M. Y. Dong, Y. G. Xie, A. A. Zafar, X. L. Luo, M. Destefanis, T. Liu, J. F. Qiu, Tao Sun, Angelo Rivetti, S. P. Wen, Y. B. Zhao, W. Shan, Y. Ding, X. S. Qin, X. R. Zhou, R. X. Yang, J. H. Zou, J. Dong, S. Qian, G. A. Chelkov, P. W. Luo, L. Fava, K. Begzsuren, Q. An, Jialun Ping, S. S. Sun, Huihui Liu, Zhi Yang, K. H. Rashid, W. P. Wang, Cheng Li, Magnus Wolke, Y. H. Xie, F. Bianchi, Zhang Li, H. B. Li, S. L. Yang, X. Y. Zhang, Y. F. Liang, Wei Xu, B. J. Liu, A. Pitka, K. Goetzen, T. Y. Xing, D. Y. Chen, T. T. Han, P. Adlarson, S. J. Zhao, X. L. Wang, S. Nisar, C. J. Tang, F. De Mori, M. Maggiora, Ling Zhao, C. L. Luo, Y. T. Liang, Y. Hu, J. B. Liu, Xujin Yuan, Z. Ning, J. G. Messchendorp, S. J. Chen, J. L. Li, M. Albrecht, Y. J. Sun, Yifan Yang, Y. P. Lu, S. Y. Xiao, W. Imoehl, Q. J. Xu, M. Rolo, Lei Zhao, B. Q. Wang, Z. L. Hou, V. Rodin, L. Y. Dong, J. Q. Zhang, D. Y. Liu, F. Nerling, X. H. Liu, L. Q. Qin, A. Bortone, S. B. Liu, Y. Nefedov, Q. Zhou, W. D. Li, B. T. Tsednee, W. Kühn, Z. Y. You, R. Farinelli, F. F. Sui, M. H. Gu, J. P. Dai, B. Zhong, L. B. Guo, Xuanhong Lou, Viktor Thorén, R. E. Mitchell, Nasser Kalantar-Nayestanaki, I. Balossino, Yue Pan, Fang Liu, U. Wiedner, I. Denysenko, I. Uman, A. Q. Guo, C. W. Wang, H. L. Ma, D. M. Li, R. Kiuchi, S. Y. Li, C. Zhong, J. B. Jiao, Lei Li, Z. A. Zhu, H. Y. Zhang, W. M. Song, X. P. Xu, X. B. Ji, P. Patteri, Y. Fu, X. F. Wang, X. N. Ma, C. X. Yu, R. B. de Boer, M. Kuemmel, Matthew Glenn Kurth, M. Bertani, Y. F. Long, F. Cossio, Ruiting Ma, K. J. Zhu, K. Ravindran, Z. Qian, G. F. Chen, A. N. Zhu, Huanhuan Liu, Z. J. Xiao, H. J. Lu, J. G. Lu, L. Yang, R. S. Shi, Tao Zhang, Shuai Liu, G. Felici, C. P. Shen, C. Z. Yuan, Jianyu Zhang, N. Cao, H. Muramatsu, J. W. Zhao, Q. M. Ma, X. F. Cui, L. D. Liu, J. Y. Zhang, R. Kliemt, X. K. Zhou, Guangyi Zhang, B. Zheng, R. G. Ping, F. E. Maas, Zujian Wang, T. Z. Han, A. Mangoni, J. J. Xu, Y. C. Zhu, X. L. Gao, M. Fritsch, Xu Shan, M. Kavatsyuk, J. D. Lu, Y. K. Heng, T. Hu, C. Schnier, Y. Q. Wang, Z. H. Qin, A. Guskov, M. Pelizaeus, Jie Yu, Y. Schelhaas, H. Xiao, T. Held, Jinfei Wu, Xiangcheng Pan, H. C. Shi, H. J. Li, O. Bakina, Y. H. Zheng, I. B. Nikolaev, Andrzej Kupsc, C. X. Liu, Yi Zhang, X. H. Li, J. H. Yin, L. Wollenberg, Zhenxiong Yuan, A. Calcaterra, Z. G. Zhao, Lei Zhang, H. R. Qi, Q. Q. Song, Y. Yuan, Cong-Feng Qiao, M. L. Chen, L. Z. Liao, W. J. Zhu, W. G. Li, A. G. Denig, T. Holtmann, X. D. Shi, Y. K. Sun, Y. P. Guo, Meng Wang, Muhammad Irshad, Dan Wang, B. X. Zhang, Xingchao Dai, X. T. Huang, M. Shao, Y. T. Gu, S. Gu, C. X. Yue, N. Yu. Muchnoi, C. Dong, S. Sosio, X. S. Kang, P. X. Shen, Z. Wu, G. Rong, Serkant Ali Cetin, T. J. Min, Yu Bai, H. H. Zhang, S. Spataro, Y. H. Zhang, J. F. Sun, J. Y. Liu, G. Cibinetto, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, S. L. Olsen, A. Sarantsev, R. Kappert, D. H. Wei, P. R. Li, J. S. Lange, Xu Yan, R. T. Ma, S. Marcello, Y. Zeng, Z. Y. Wang, Zhiqing Zhang, H. M. Liu, Zhe Sun, Yao Wang, Teresa Lenz, M. Lellmann, S. Maldaner, Lingxuan Zhang, Y. X. Tan, G. F. Xu, S. Lusso, J. F. Hu, S. Jin, Anita, F. A. Harris, H. B. Jiang, W. L. Chang, Jiawei Zhang, X. H. Mo, G. F. Cao, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, X. P. Qin, Y. F. Wang, L. L. Wang, H. Cai, L. Q. Huang, Joachim Pettersson, M. X. Luo, Dylan Jaide White, J. J. Song, L. Sun, F. Feldbauer, Jacek Biernat, D. V. Dedovich, H. Leithoff, Z. L. Huang, Feng Liu, M. Ablikim, T. Hussain, X. Y. Jiang, Y. N. Gao, X. Y. Ma, W. X. Gong, A. Pathak, T. Johansson, J. F. Chang, C. H. Li, Y. Zhang, O. B. Kolcu, X. Cai, L. Lavezzi, Yan Zhang, S. Ahmed, Y. X. Yang, W. Gradl, Y. X. Song, Q. Zhao, Y. Z. Sun, I. K. Keshk, H. B. Liu, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, B. Kopf, K. L. He, Ziyi Wang, S. W. Han, M. Z. Wang, Jimin Zhao, P. L. Li, C. F. Redmer, M. Qi, H. J. Yang, X. L. Lu, D. C. Shan, L. Koch, A. Khoukaz, R. Baldini Ferroli, J. Libby, Yaquan Fang, M. Greco, Shou-hua Zhu, Krisztian Peters, John Jake Lane, Guoqiang Yu, S. Malde, K. Schoenning, B. S. Zou, H. Liang, Haiping Peng, Tao Luo, B. X. Yu, Shulei Zhang, H. S. Chen, Alperen Yuncu, H. L. Dai, Ke Wang, W. Y. Sun, Ke Liu, R. Poling, F. H. Heinsius, Q. A. Malik, G. Mezzadri, W. C. Yan, B. L. Wang, Zhiqiang Liu, L. M. Gu, M. N. Achasov, L. P. Zhou, Y. M. Ma, Z. P. Mao, Y. X. Zhao Zhao, J. Fang, Ch. Rosner, G. Y. Tang, X. H. Xie, Jie Zhao, Alexey Zhemchugov, H. M. Hu, F. H. Liu, Nicolas Berger, J. W. Zhang, T. Y. Qi, M. Himmelreich, W. H. Wang, T. Yu, Wenbin Qian, Y. G. Gao, X. Q. Hao, S. Nakhoul, S. Jaeger, P. Larin, and L. J. Wu

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Sigma, 010306 general physics, Branching (polymer chemistry), 01 natural sciences, Bar (unit)
Abstract

We measured the branching fractions of the decays χcJ→Σ-Σ¯+ for the first time using the final states nn¯π+π-. The data sample exploited here is 448.1×106 ψ(3686) events collected with BESIII. We find B(χcJ→Σ-Σ¯+)=(51.3±2.4±4.1)×10-5,(5.7±1.4±0.6)×10-5, and (4.4±1.7±0.5)×10-5, for J=0, 1, 2, respectively, where the first uncertainties are statistical and the second systematic.

Published
2020
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29. Observation of D+→ηηπ+ and improved measurement of D0(+)→ηπ+π−(0)

Author

R. Kliemt, A. Mangoni, Xiangcheng Pan, Q. Liu, Tristan Weber, A. Guskov, Jie Yu, T. Johansson, Ke Wang, J. F. Chang, Xiao-Rui Lyu, L. L. Ma, L. Gong, T. J. Min, K. J. Zhu, L. G. Xia, A. Amoroso, Q. A. Malik, G. Mezzadri, W. C. Yan, Zhiqiang Liu, G. Cibinetto, Y. F. Wang, O. B. Kolcu, H. R. Qi, Lingxuan Zhang, Y. X. Tan, W. Imoehl, X. L. Gao, L. M. Gu, M. N. Achasov, L. P. Zhou, X. Cai, X. H. Liu, R. Poling, W. G. Li, A. G. Denig, M. H. Ye, L. Lavezzi, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, A. Dbeyssi, J. P. Dai, Y. M. Ma, Z. P. Mao, Yan Zhang, Y. K. Sun, Angelo Rivetti, Magnus Wolke, Y. F. Liang, D. P. Jin, J. Fang, J. Bloms, F. H. Heinsius, X. P. Qin, S. Spataro, Zongyuan Wang, Ch. Rosner, Xujin Yuan, M. Kuemmel, Matthew Glenn Kurth, X. F. Cui, G. S. Huang, C. Dong, S. Sosio, W. J. Zhu, X. D. Shi, Dan Wang, S. Gu, H. Liang, S. B. Liu, B. L. Wang, T. C. Zhao, M. Richter, Z. Ning, S. Y. Xiao, Q. P. Ji, Y. Nefedov, F. F. Sui, M. H. Gu, R. Kiuchi, Lei Li, H. M. Liu, J. F. Hu, F. Weidner, D. Y. Liu, J. B. Jiao, F. Li, F. C. Ma, L. Y. Dong, X. K. Zhou, L. J. Wu, Y. J. Mo, Y. H. Zheng, Cong-Feng Qiao, Ke Liu, F. De Mori, I. Uman, X. L. Ji, H. Y. Sheng, C. X. Yu, G. F. Cao, Q. Ouyang, S. S. Fang, Y. B. Liu, T. Liu, N. Yu. Muchnoi, X. S. Kang, Y. H. Zhang, S. L. Olsen, X. F. Wang, Z. J. Xiao, X D Shi, Xiang-Gan Liu, Y. J. Mao, Z. G. Wang, H. Y. Zhang, Joachim Pettersson, E. M. Gersabeck, J. F. Qiu, M. Papenbrock, L. Fava, Zhi Yang, T. Y. Qi, Q. M. Ma, R. T. Ma, A. Mustafa, H. X. Yang, Z. Y. Wang, Teresa Lenz, I. Garzia, G. Wilkinson, X. L. Luo, G. F. Chen, Z. Y. Zhang, J. Y. Zhang, F. Nerling, B. Zheng, R. G. Ping, J. B. Zhao, Y. Yuan, Z. A. Liu, Y. S. Zhu, H. W. Wen, Yu Zhang, S. Qian, Q. An, Jialun Ping, M. Himmelreich, Fang Liu, K. Begzsuren, Yunlong Zhang, I. R. Boyko, W. P. Wang, F. Bianchi, X. Y. Zhang, Xiaozhong Huang, Huihui Liu, W. S. Cheng, M. Kuessner, V. Prasad, Y. K. Heng, Yao Zhang, G. Li, T. T. Han, X. L. Wang, S. J. Zhao, B. J. Liu, D. Bettoni, X. Y. Shen, J. L. Zhang, J. B. Liu, Y. J. Sun, Yifan Yang, J. G. Messchendorp, U. Wiedner, Y. G. Xie, I. Denysenko, Q. J. Xu, Li Zhou, Y. Ban, P. Weidenkaff, S. P. Wen, Jianping Zheng, Tao Luo, L. Y. Liu, I. B. Nikolaev, J. C. Chen, Xuanhong Lou, T. Yu, Y. Ding, Viktor Thorén, Andrzej Kupsc, Y. P. Lu, Nasser Kalantar-Nayestanaki, G. A. Chelkov, S. X. Du, B. X. Yu, K. Y. Liu, C. Morales Morales, Yue Pan, I. Balossino, M. L. Chen, Huanhuan Liu, G. Felici, C. D. Fu, M. Destefanis, Shulei Zhang, J. H. Yin, M. Shao, Y. T. Gu, C. X. Yue, Z. L. Dou, T. Y. Xing, D. Y. Chen, X. S. Qin, X. R. Zhou, Cheng Li, C. Q. Feng, X. R. Chen, Z. Y. Deng, H. S. Chen, Alperen Yuncu, H. L. Dai, Y. H. Xie, M. Maggiora, B. Y. Zhang, W. Kühn, X. Tang, H. J. Li, Ling Zhao, L. Koch, A. Khoukaz, X. H. Li, L. Wollenberg, J. Libby, M. Rolo, Xingchao Dai, Z. Y. You, Z. A. Zhu, Lei Zhao, Z. L. Hou, Yaquan Fang, M. Greco, Y. G. Gao, Shou-hua Zhu, R. Baldini Ferroli, P. W. Luo, J. Min, H. B. Liu, Krisztian Peters, S. Malde, M. Z. Wang, F. Cossio, C. P. Shen, M. Y. Dong, K. Schoenning, B. S. Zou, K. Goetzen, B. Kopf, Y. Schelhaas, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, X. N. Li, Zhang Li, C. Z. Yuan, N. Cao, A. Q. Guo, C. W. Wang, Haiping Peng, K. L. He, Q. Q. Song, J. H. Zou, Ziyi Wang, Y. P. Guo, P. L. Wang, S. S. Sun, Serkant Ali Cetin, S. W. Han, V. Rodin, Meng Wang, Muhammad Irshad, Z. H. Qin, R. E. Mitchell, F. A. Harris, W. L. Chang, X. P. Xu, X. B. Ji, Yao Wang, Jimin Zhao, P. L. Li, Z. P. Zhang, H. Leithoff, P. Patteri, C. F. Redmer, Bibo Ke, W. B. Yan, M. Bertani, G. Y. Tang, S. Pacetti, L. Yang, N. Huesken, Ke Li, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, F. H. Liu, X. H. Mo, L. S. Wang, Nicolas Berger, L. L. Wang, H. Cai, H. B. Jiang, Jacek Biernat, J. W. Zhang, X. Q. Hao, S. Nakhoul, W. Gradl, X. N. Ma, S. Jaeger, P. Larin, Y. X. Song, R. Kappert, B. Wang, Zujian Wang, M. Fritsch, M. Kavatsyuk, G. F. Xu, S. Jin, Anita, C. Sowa, Y. B. Zhao, M. Qi, H. J. Yang, W. Shan, J. Dong, S. Nisar, C. J. Tang, Y. Hu, M. M. Ma, B. X. Zhang, Y. Fu, J. W. Zhao, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Y. C. Zhu, Z. Jiao, D. H. Zhang, T. Held, X. Y. Song, M. Albrecht, W. D. Li, F. Feldbauer, Feng Liu, B. T. Tsednee, M. Ablikim, X. Y. Jiang, R. Farinelli, H. L. Ma, D. M. Li, H. Muramatsu, L. D. Liu, M. Pelizaeus, S. Ahmed, Y. X. Yang, J. J. Xu, J. D. Lu, C. Schnier, Y. Q. Wang, Lei Zhang, X. T. Huang, J. Q. Zhang, G. Rong, J. S. Huang, Q. Zhao, Y. Z. Sun, Z. X. Meng, X. A. Xiong, I. K. Keshk, A. A. Zafar, S. L. Yang, C. X. Lin, G. R. Liao, Alexander Leon Gilman, M. Rump, Gang Zhao, J. F. Sun, S. Marcello, Y. Zeng, Y. J. Lin, Zhe Sun, S. Lusso, K. H. Rashid, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, C. X. Liu, J. J. Song, L. Sun, H. B. Li, Y. T. Liang, S. J. Chen, C. L. Luo, S. Y. Li, Q. Zhou, T. Holtmann, J. Y. Liu, C. C. Zhang, H. J. Lu, J. G. Lu, Y. N. Gao, B. Zhong, L. B. Guo, F. E. Maas, T. Hu, X. L. Li, Feng Yan, L. H. Wu, M. Savrie, O. Bakina, Yi Jin, Y. J. Xiao, P. X. Shen, Z. Wu, M.G. Alekseev, Zhiqing Zhang, A. N. Zhu, Tao Zhang, Xu Shan, J. C. Li, J. Zhuang, M. X. Luo, D. V. Dedovich, A. Calcaterra, Z. G. Zhao, L. Z. Liao, Yu Bai, H. H. Zhang, Z. J. Sun, S. Maldaner, P. Kiese, Yuan Hou, R. A. Briere, X. S. Jiang, R. X. Yang, Wei Xu, A. Pitka, P. Adlarson, Y. F. Long, K. Ravindran, Yi Zhang, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, T. Hussain, X. Y. Ma, W. X. Gong, and C. H. Li

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Pi, CP violation, 010306 general physics, 01 natural sciences
Published
2020
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30. Partial wave analysis of ψ(3686)→K+K−η

Author

Y. H. Zheng, Cong-Feng Qiao, G. Y. Tang, M. Qi, H. J. Yang, N. Yu. Muchnoi, S. Qian, P. W. Luo, Q. An, Jialun Ping, Y. H. Xie, Jie Zhao, X. S. Kang, S. J. Zhao, M. Kuemmel, Matthew Glenn Kurth, B. J. Liu, Y. H. Zhang, K. Zhang, D. X. Lin, Zhang Li, X. Y. Zhang, X. L. Wang, Alexey Zhemchugov, H. M. Hu, M. Maggiora, Ling Zhao, S. L. Olsen, Y. Fu, F. H. Liu, X. F. Cui, J. B. Liu, Nicolas Berger, Y. H. Yan, Y. J. Sun, Yifan Yang, Fang Liu, Lei Zhao, Z. Y. Wang, Teresa Lenz, J. D. Lu, Z. L. Hou, V. Rodin, Q. J. Xu, U. Wiedner, I. Denysenko, J. W. Zhao, X. T. Huang, J. W. Zhang, G. Rong, Y. P. Lu, X. P. Xu, X. B. Ji, Q. Liu, Tristan Weber, Z. X. Meng, X. A. Xiong, J. C. Chen, Xuanhong Lou, L. H. Wu, M. Savrie, Yi Jin, A. A. Zafar, J. W. Li, Y. C. Zhu, R. M. Wang, Y. J. Xiao, P. Patteri, R. Kappert, Tao Luo, M. Richter, Viktor Thorén, G. S. Huang, K. H. Rashid, Nasser Kalantar-Nayestanaki, L. L. Ma, L. Gong, Y. T. Liang, Z. Ning, S. Y. Xiao, F. Li, B. Y. Zhang, S. J. Chen, C. Morales Morales, C. Z. Yuan, N. Cao, L. J. Wu, W. J. Zhu, X. D. Shi, Dan Wang, H. Liang, Lingxuan Zhang, T. Held, S. Gu, F. C. Ma, Yue Pan, I. Balossino, A. Calcaterra, Z. G. Zhao, Q. P. Ji, L. G. Xia, A. Amoroso, L. Z. Liao, X. L. Ji, X. Q. Hao, S. Nakhoul, Y. Schelhaas, W. Imoehl, I. Uman, A. Dbeyssi, G. F. Xu, B. X. Yu, S. Jin, H. R. Qi, Q. Q. Song, Y. J. Mo, Huanhuan Liu, G. Wilkinson, X. P. Qin, W. S. Cheng, Yao Zhang, G. Felici, Jun-Yi Zhang, G. Li, X. K. Zhou, X. N. Ma, X. H. Liu, J. Min, Angelo Rivetti, S. L. Yang, P. Larin, Xujin Yuan, J. P. Dai, F. De Mori, Y. P. Guo, Z. J. Xiao, X D Shi, Bibo Ke, F. F. Sui, M. H. Gu, Z. Y. Zhang, R. Kiuchi, G. R. Liao, Serkant Ali Cetin, H. Y. Sheng, Shulei Zhang, Y. J. Mao, T. Liu, J. F. Qiu, M. Papenbrock, F. Y. Li, C. D. Fu, C. Q. Feng, H. B. Liu, Xiang-Gan Liu, W. B. Yan, Z. Y. Deng, S. Pacetti, L. Fava, D. Y. Liu, M. Albrecht, I. R. Boyko, H. S. Chen, Alperen Yuncu, J. B. Jiao, F. Nerling, H. X. Yang, T. Y. Qi, S. B. Liu, B. Kopf, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, I. Garzia, Ke Liu, Liqing Xu, J. Libby, Yaquan Fang, M. Greco, Shou-hua Zhu, Y. G. Xie, Li Zhou, Yang Zhang, Zhiqing Liu, M. Himmelreich, T. Johansson, J. F. Chang, H. J. Li, X. H. Li, Y. Nefedov, Q. L. Xiu, Yu Bai, H. H. Zhang, N. Huesken, W. D. Li, B. T. Tsednee, X. Y. Song, K. Goetzen, X. Y. Shen, Y. F. Wang, Y. Ding, Y. X. Xia, T. Yu, K. L. He, M. Kuessner, S. W. Han, M. Z. Wang, Jimin Zhao, P. L. Li, X. F. Wang, H. L. Dai, Ke Wang, T. Y. Xing, D. Y. Chen, Q. M. Ma, A. Mustafa, B. Garillon, Ke Li, M. Y. Dong, W. Kühn, Z. J. Sun, C. X. Yu, B. Zheng, R. G. Ping, Z. A. Liu, V. Prasad, O. B. Kolcu, Zujian Wang, X. Cai, L. Lavezzi, Z. L. Dou, Xingchao Dai, E. M. Gersabeck, X. L. Luo, C. F. Redmer, R. Poling, J. F. Sun, F. H. Heinsius, Fenfen An, Z. G. Wang, H. Y. Zhang, Z. Y. You, Z. A. Zhu, K. Schoenning, Q. Y. Li, B. S. Zou, B. Wang, M. Fritsch, M. Kavatsyuk, Y. Yuan, Y. S. Zhu, Yu Zhang, J. H. Zou, Y. G. Gao, G. F. Chen, J. Y. Zhang, M. Bertani, B. L. Wang, Xiao-Rui Lyu, Huihui Liu, S. Marcello, T. C. Zhao, Y. Zeng, Y. J. Lin, Zhe Sun, J. G. Messchendorp, G. A. Chelkov, S. S. Sun, Q. A. Malik, G. Mezzadri, S. Lusso, K. Begzsuren, W. C. Yan, Magnus Wolke, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, X. R. Zhou, Cheng Li, R. Kliemt, A. Mangoni, L. Yang, A. Guskov, W. P. Wang, S. Maldaner, F. Bianchi, Y. F. Liang, Jie Yu, D. P. Jin, C. P. Shen, L. M. Gu, H. W. Wen, L. Koch, A. Khoukaz, M. N. Achasov, Y. B. Chen, L. P. Zhou, R. E. Mitchell, Xiaofeng Zhu, J. Z. Zhang, Y. M. Ma, J. C. Li, T. J. Min, K. J. Zhu, J. J. Song, R. Baldini Ferroli, Y. K. Heng, M. M. Ma, B. X. Zhang, L. Sun, Z. P. Mao, N. Qin, W. G. Li, A. G. Denig, Y. K. Sun, J. J. Xu, Xiaoyu Zhou, G. Cibinetto, Y. T. Tan, W. Gradl, Krisztian Peters, S. Malde, J. Zhuang, J. Bloms, Z. Q. Yang, J. Fang, Xiaozhong Huang, L. Y. Liu, M. X. Luo, S. Spataro, Ch. Rosner, J. S. Huang, Zongyuan Wang, X. N. Li, Haiping Peng, D. V. Dedovich, Xu Zhou, C. X. Liu, Andrzej Kupsc, Lei Li, H. M. Liu, J. F. Hu, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Q. Ouyang, M. L. Chen, G. F. Cao, S. S. Fang, F. Feldbauer, A. Q. Guo, C. W. Wang, Y. B. Liu, H. B. Li, C. L. Luo, Q. Zhou, Feng Liu, C. C. Zhang, B. Zhong, L. B. Guo, M. Ablikim, Z. H. Qin, M.G. Alekseev, X. Y. Jiang, A. N. Zhu, Tao Zhang, Xu Shan, I. B. Nikolaev, J. H. Yin, M. Shao, Y. T. Gu, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, M. H. Ye, L. Y. Dong, X. H. Mo, L. S. Wang, L. L. Wang, H. Cai, Jacek Biernat, Z. Jiao, D. H. Zhang, X. Tang, M. Rolo, C. Sowa, Y. B. Zhao, F. Cossio, X. L. Gao, C. Dong, S. Sosio, W. Shan, J. Dong, Joachim Pettersson, Yunlong Zhang, D. Bettoni, J. L. Zhang, H. L. Jiang, Jianping Zheng, S. X. Du, K. Y. Liu, M. Destefanis, S. Nisar, C. J. Tang, Y. Hu, J. Q. Zhang, H. J. Lu, J. G. Lu, P. L. Wang, Meng Wang, Muhammad Irshad, F. E. Maas, T. Hu, F. A. Harris, W. L. Chang, Z. P. Zhang, H. Leithoff, J. Y. Liu, X. L. Li, O. Bakina, Q. Gao, Y. N. Gao, Y. Zhang, Feng Yan, J. Z. Fan, P. X. Shen, Z. Wu, R. Farinelli, H. L. Ma, D. M. Li, Zhiqing Zhang, H. Muramatsu, M. Pelizaeus, S. Ahmed, Y. X. Yang, Q. Zhao, Y. Z. Sun, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, Z. Gao, S. L. Niu, Y. F. Long, K. Ravindran, Yi Zhang, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, T. Hussain, X. Y. Ma, W. X. Gong, C. H. Li, X. H. Sun, P. Kiese, Yuan Hou, R. A. Briere, X. S. Jiang, R. X. Yang, Wei Xu, A. Pitka, and P. Adlarson

Subjects
Physics, 010308 nuclear & particles physics, Branching fraction, Partial wave analysis, 0103 physical sciences, Resonance, State (functional analysis), Atomic physics, 010306 general physics, 01 natural sciences
Abstract

Using a sample of (448.1±2.9)×106 ψ(3686) events collected with the BESIII detector, we perform the first partial wave analysis of ψ(3686)→K+K-η. In addition to the well established states, ϕ(1020), ϕ(1680), and K3*(1780), contributions from X(1750), ρ(2150), ρ3(2250), and K2*(1980) are also observed. The X(1750) state is determined to be a 1-- resonance. The simultaneous observation of the ϕ(1680) and X(1750) indicates that the X(1750), with previous observations in photoproduction, is distinct from the ϕ(1680). The masses, widths, branching fractions of ψ(3686)→K+K-η, and the intermediate resonances are also measured.

Published
2020
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31. Search for the rare decay η′→π0π0π0π0 at BESIII

Author

Z. G. Wang, M. Kuessner, X. L. Gao, H. Y. Zhang, Z. A. Liu, G. A. Chelkov, R. Farinelli, Y. Schelhaas, Z. X. Meng, X. A. Xiong, Xiao-Rui Lyu, V. Prasad, P. Kiese, S. L. Yang, Yuan Hou, H. L. Ma, C. Dong, Y. H. Xie, Y. Ban, P. Weidenkaff, M. Maggiora, Ling Zhao, G. F. Chen, M. Albrecht, Lei Zhao, S. Sosio, Z. L. Hou, Y. H. Zheng, Cong-Feng Qiao, C. Z. Yuan, N. Cao, R. A. Briere, D. M. Li, L. D. Liu, S. P. Wen, A. A. Zafar, H. Muramatsu, G. R. Liao, X. S. Qin, X. R. Zhou, J. Y. Zhang, W. D. Li, X. S. Jiang, Zongyuan Wang, B. T. Tsednee, Cheng Li, I. B. Nikolaev, H. R. Qi, Q. Q. Song, N. Yu. Muchnoi, Joachim Pettersson, P. L. Wang, R. Kliemt, Meng Wang, L. J. Wu, Y. P. Guo, Muhammad Irshad, M. Pelizaeus, X. S. Kang, X. Q. Hao, J. H. Yin, R. X. Yang, Wei Xu, Y. H. Zhang, S. Nakhoul, H. W. Wen, R. T. Ma, Yunlong Zhang, Bibo Ke, A. Mangoni, A. Guskov, Jie Yu, T. Holtmann, K. H. Rashid, Serkant Ali Cetin, J. Y. Liu, F. Weidner, Y. J. Mo, A. Pitka, P. Adlarson, Q. Liu, Tristan Weber, M. Bertani, J. J. Xu, S. L. Olsen, D. Bettoni, Z. Y. Wang, Y. Fu, S. Jaeger, J. L. Zhang, Q. Ouyang, Xiaozhong Huang, Xujin Yuan, P. Larin, J. Bloms, W. B. Yan, S. S. Fang, L. L. Ma, L. Gong, S. Pacetti, Teresa Lenz, L. Yang, Jianping Zheng, S. Qian, Q. An, Jialun Ping, M. Shao, Y. T. Gu, Y. T. Liang, S. J. Chen, W. Imoehl, J. S. Huang, C. X. Yue, J. W. Zhao, M. Kuemmel, Matthew Glenn Kurth, W. G. Li, A. G. Denig, Y. K. Sun, S. Spataro, X. Y. Zhang, X. L. Wang, F. A. Harris, W. L. Chang, Y. K. Heng, X. H. Liu, Lingxuan Zhang, Y. X. Tan, N. Huesken, Ke Li, X. F. Cui, H. B. Jiang, T. J. Min, K. J. Zhu, G. Cibinetto, A. Calcaterra, Z. G. Zhao, S. B. Liu, L. Z. Liao, Y. Nefedov, L. G. Xia, A. Amoroso, J. B. Liu, Y. N. Gao, Feng Yan, X. L. Ji, Y. B. Liu, Y. J. Sun, Yifan Yang, T. Y. Qi, Z. P. Zhang, A. Dbeyssi, Y. P. Lu, J. P. Dai, S. X. Du, Andrzej Kupsc, Xiang-Gan Liu, J. B. Zhao, Q. P. Ji, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, M. Himmelreich, K. Y. Liu, M. Destefanis, X. P. Qin, Y. C. Zhu, Y. F. Long, K. Ravindran, H. Leithoff, C. X. Liu, I. R. Boyko, G. S. Huang, P. W. Luo, T. Held, Zhang Li, H. H. Zhang, X. N. Ma, Lei Li, W. Gradl, B. Wang, D. Y. Liu, J. B. Jiao, Huanhuan Liu, G. Felici, Z. Y. Zhang, M. Y. Dong, Angelo Rivetti, F. F. Sui, M. H. Gu, R. Kiuchi, T. Yu, W. J. Zhu, X. D. Shi, Dan Wang, R. Kappert, H. M. Liu, H. Y. Sheng, Y. X. Song, X. K. Zhou, S. Ahmed, Y. X. Yang, S. Gu, Z. J. Sun, F. Li, L. H. Wu, F. C. Ma, M. G. Zhao, Y. H. Yang, X. Tang, X. Y. Shen, C. X. Yu, X. X. Ma, R. P. Guo, J. Zhu, J. H. Zou, Yi Zhang, V. Rodin, J. F. Sun, M. Savrie, T. Johansson, J. F. Chang, S. S. Sun, J. F. Hu, F. De Mori, J. Min, Y. G. Xie, Li Zhou, M. Fritsch, M. L. Chen, M. Rolo, Yi Jin, H. B. Liu, B. Zheng, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, Y. G. Gao, X. P. Xu, X. B. Ji, S. Marcello, Y. Zeng, Y. J. Lin, M. Kavatsyuk, S. Maldaner, Zhe Sun, P. Patteri, R. G. Ping, Z. L. Dou, R. E. Mitchell, Q. Zhao, G. Y. Tang, S. Lusso, B. Kopf, Y. F. Wang, X. H. Mo, L. S. Wang, Y. Ding, G. F. Xu, F. Cossio, M. H. Ye, G. F. Cao, Y. J. Xiao, K. L. He, S. Jin, O. B. Kolcu, J. C. Li, H. J. Li, Y. Z. Sun, Fang Liu, Ziyi Wang, S. W. Han, U. Wiedner, I. Denysenko, T. Liu, J. F. Qiu, I. K. Keshk, Jie Zhao, D. X. Lin, M. Papenbrock, Alexey Zhemchugov, H. M. Hu, M. Z. Wang, T. T. Han, G. Wilkinson, X. Cai, Y. B. Chen, Jimin Zhao, Xiaofeng Zhu, J. Z. Zhang, T. Hussain, X. H. Li, X. Y. Ma, S. J. Zhao, C. X. Lin, X D Shi, F. H. Liu, Nicolas Berger, Y. Bai Anita, X. F. Wang, L. Wollenberg, J. J. Song, B. Y. Zhang, Alexander Leon Gilman, Xingchao Dai, P. L. Li, M. Rump, Gang Zhao, B. J. Liu, W. S. Cheng, Yao Zhang, L. Fava, Zhi Yang, G. Li, L. Sun, L. L. Wang, H. Cai, J. Zhuang, F. Nerling, W. X. Gong, L. Lavezzi, Q. M. Ma, C. F. Redmer, E. M. Gersabeck, A. Mustafa, Y. J. Mao, I. Uman, M. X. Luo, J. W. Zhang, M. Qi, Q. J. Xu, Jacek Biernat, Yan Zhang, C. D. Fu, C. Q. Feng, J. C. Chen, Xuanhong Lou, H. J. Yang, T. Y. Xing, D. Y. Chen, H. X. Yang, I. Garzia, D. V. Dedovich, X. L. Luo, B. X. Zhang, Y. Yuan, Viktor Thorén, Y. S. Zhu, Yu Zhang, C. H. Li, X. R. Chen, M. Richter, Z. Y. Deng, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, Z. J. Xiao, I. Balossino, Z. Ning, S. Y. Xiao, K. Begzsuren, X. Y. Song, C. Sowa, Y. B. Zhao, W. P. Wang, W. Kühn, L. Y. Dong, F. Bianchi, W. Shan, J. D. Lu, C. Schnier, Y. Q. Wang, J. Dong, Z. Y. You, Z. A. Zhu, Lei Zhang, X. T. Huang, S. Nisar, C. J. Tang, Y. Hu, G. Rong, H. B. Li, K. Goetzen, C. L. Luo, Q. Zhou, Huihui Liu, L. Y. Liu, C. C. Zhang, Magnus Wolke, B. Zhong, L. B. Guo, M.G. Alekseev, Yao Wang, Y. F. Liang, A. N. Zhu, D. P. Jin, Tao Zhang, C. P. Shen, Zujian Wang, Xu Shan, J. G. Messchendorp, M. M. Ma, J. Chai, F. Feldbauer, A. Q. Guo, Feng Liu, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, D. H. Zhang, C. W. Wang, M. Ablikim, X. Y. Jiang, Z. H. Qin, J. Q. Zhang, H. J. Lu, J. G. Lu, F. E. Maas, T. Hu, X. L. Li, O. Bakina, P. X. Shen, Z. Wu, Zhiqing Zhang, J. Libby, Yaquan Fang, M. Greco, Shou-hua Zhu, K. Schoenning, B. S. Zou, Q. A. Malik, G. Mezzadri, W. C. Yan, Zhiqiang Liu, L. M. Gu, M. N. Achasov, L. P. Zhou, Y. M. Ma, Z. P. Mao, J. Fang, Ch. Rosner, H. Liang, Ke Liu, Ke Wang, R. Poling, F. H. Heinsius, B. L. Wang, T. C. Zhao, L. Koch, A. Khoukaz, R. Baldini Ferroli, Krisztian Peters, S. Malde, X. N. Li, Haiping Peng, Tao Luo, B. X. Yu, Shulei Zhang, H. S. Chen, Alperen Yuncu, and H. L. Dai

Subjects
Physics, Nuclear physics, 010308 nuclear & particles physics, 0103 physical sciences, Detector, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, 01 natural sciences, Signal, Sample (graphics)
Abstract

Using a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector, we perform a search for the rare decay if eta' -> 4 pi(0) via J/psi -> gamma eta'. No significant eta' signal i ...

Published
2020
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32. Cross section measurement of e+e−→η′J/ψ from s=4.178 to 4.600 GeV

Author

S. Qian, Q. An, Jialun Ping, H. Liang, K. Zhang, X. Y. Zhang, Q. P. Ji, X. L. Wang, J. B. Liu, J. J. Xu, Z. Q. Yang, M. Qi, H. J. Yang, Y. J. Sun, Yifan Yang, Fang Liu, U. Wiedner, Y. P. Lu, I. Denysenko, X. L. Ji, F. De Mori, Ke Liu, J. S. Huang, Ke Wang, X. N. Ma, B. Y. Zhang, Z. Y. Zhang, C. X. Liu, M. Richter, S. Ahmed, Y. X. Yang, Z. Ning, S. Y. Xiao, M. H. Ye, Q. Zhao, Y. Z. Sun, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, Cheng Li, J. Y. Liu, D. Y. Liu, Z. X. Meng, J. B. Jiao, B. Wang, Q. Gao, Y. N. Gao, Y. Zhang, X. A. Xiong, Feng Yan, R. Poling, J. Z. Fan, A. A. Zafar, J. Libby, Y. G. Xie, M. Fritsch, R. Kappert, M. M. Ma, L. Y. Dong, X. F. Wang, M. Kavatsyuk, F. H. Heinsius, R. Farinelli, X. K. Zhou, Y. H. Zheng, Cong-Feng Qiao, F. Li, H. L. Ma, Q. M. Ma, A. Mustafa, Fenfen An, D. M. Li, M. Albrecht, H. Muramatsu, Yaquan Fang, M. Greco, Li Zhou, Shou-hua Zhu, M. Pelizaeus, A. Calcaterra, Z. G. Zhao, F. C. Ma, L. Z. Liao, B. L. Wang, Yu Bai, H. H. Zhang, N. Yu. Muchnoi, W. G. Li, A. G. Denig, M. Himmelreich, Y. K. Sun, Xiaoyu Zhou, G. F. Xu, Bibo Ke, K. Schoenning, B. S. Zou, W. B. Yan, M. Kuessner, T. C. Zhao, G. Wilkinson, S. Jin, Xujin Yuan, F. F. Sui, M. H. Gu, S. Spataro, W. S. Cheng, Yao Zhang, G. Li, Magnus Wolke, B. X. Zhang, Y. F. Liang, D. P. Jin, Z. J. Sun, Q. A. Malik, G. Mezzadri, W. C. Yan, X. S. Kang, R. Kiuchi, H. Y. Sheng, Tao Luo, W. D. Li, B. T. Tsednee, E. M. Gersabeck, S. Maldaner, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Y. H. Zhang, S. Pacetti, N. Huesken, C. X. Yu, T. Liu, G. A. Chelkov, L. M. Gu, M. N. Achasov, L. P. Zhou, Lei Li, C. D. Fu, H. B. Li, C. Q. Feng, Zhiqing Liu, Z. Jiao, Y. X. Xia, S. B. Liu, S. L. Olsen, J. F. Qiu, M. Papenbrock, B. X. Yu, D. H. Zhang, Y. Ding, T. Yu, C. L. Luo, H. M. Liu, Y. M. Ma, Z. Y. Deng, Q. Zhou, Ke Li, Y. Nefedov, L. Fava, Z. P. Mao, B. Zheng, X. Y. Song, Y. H. Xie, X. L. Luo, J. F. Hu, Z. Y. Wang, B. J. Liu, M. Y. Dong, Teresa Lenz, C. C. Zhang, R. G. Ping, B. Zhong, L. B. Guo, I. B. Nikolaev, J. Fang, Z. L. Dou, T. Johansson, J. F. Chang, M. Maggiora, Ling Zhao, P. Kiese, Shulei Zhang, Y. Schelhaas, F. Nerling, R. Kliemt, Z. A. Liu, I. Uman, M.G. Alekseev, T. Y. Xing, D. Y. Chen, G. F. Cao, Yuan Hou, J. H. Yin, Jun-Yi Zhang, Lei Zhao, M. Shao, Y. T. Gu, C. X. Yue, Y. F. Wang, W. Imoehl, A. Mangoni, H. S. Chen, Alperen Yuncu, J. H. Zou, A. N. Zhu, A. Guskov, V. Prasad, Tao Zhang, Z. L. Hou, O. B. Kolcu, X D Shi, Jie Yu, Y. G. Gao, J. Q. Zhang, K. Goetzen, X. H. Liu, Y. Ban, P. Weidenkaff, Ch. Rosner, X. Cai, Y. J. Mao, L. Lavezzi, Xiao-Rui Lyu, H. L. Dai, Z. J. Xiao, Yang Zhang, S. S. Sun, H. X. Yang, S. P. Wen, X. Q. Hao, T. J. Min, K. J. Zhu, W. Kühn, Q. Q. Song, R. A. Briere, A. Sarantsev, Matthew Glenn Kurth, D. H. Wei, P. R. Li, S. Nakhoul, Xu Shan, I. Garzia, X. S. Qin, G. Cibinetto, X. R. Zhou, J. C. Li, C. Z. Yuan, N. Cao, J. S. Lange, J. P. Dai, Z. Y. You, P. W. Luo, L. Koch, A. Khoukaz, Y. P. Guo, Zujian Wang, Z. A. Zhu, K. Begzsuren, J. Zhuang, Zhang Li, Xiaozhong Huang, R. E. Mitchell, P. Larin, R. Baldini Ferroli, M. X. Luo, B. Garillon, Huihui Liu, F. Feldbauer, D. V. Dedovich, X. S. Jiang, J. Bloms, Serkant Ali Cetin, W. P. Wang, X. H. Mo, L. S. Wang, Xu Zhou, Krisztian Peters, S. Malde, M. Z. Wang, V. Rodin, Feng Liu, Andrzej Kupsc, F. Bianchi, X. P. Xu, X. B. Ji, P. L. Wang, Meng Wang, Muhammad Irshad, L. L. Wang, H. Cai, J. G. Messchendorp, M. L. Chen, M. Ablikim, G. Y. Tang, C. P. Shen, Jacek Biernat, P. Patteri, Yunlong Zhang, X. N. Li, X. Y. Jiang, C. Sowa, Y. B. Zhao, L. J. Wu, Jie Zhao, D. X. Lin, W. Shan, Haiping Peng, D. Bettoni, Alexey Zhemchugov, H. M. Hu, R. X. Yang, J. Dong, Y. J. Mo, Y. Yuan, Y. S. Zhu, Yu Zhang, F. H. Liu, A. Q. Guo, C. W. Wang, Nicolas Berger, Wei Xu, J. W. Zhang, F. A. Harris, W. L. Chang, A. Pitka, Y. Fu, P. Adlarson, Z. P. Zhang, H. Leithoff, Q. Liu, Tristan Weber, L. L. Ma, L. Gong, S. Nisar, C. J. Tang, Y. Hu, Y. H. Yan, J. W. Zhao, J. L. Zhang, Xiang-Gan Liu, H. L. Jiang, L. G. Xia, A. Amoroso, S. L. Niu, J. B. Zhao, A. Dbeyssi, Y. C. Zhu, L. Y. Liu, Y. F. Long, Z. H. Qin, K. Ravindran, I. R. Boyko, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, Angelo Rivetti, Jianping Zheng, Liqing Xu, Zongyuan Wang, X. Y. Shen, T. Held, Yi Zhang, K. H. Rashid, K. Y. Liu, F. Weidner, S. X. Du, Y. T. Liang, S. J. Chen, L. H. Wu, M. Savrie, Yi Jin, S. Q. Qu, Z. B. Li, R. M. Wang, Y. J. Xiao, W. Ikegami Andersson, Z. G. Wang, J. D. Lu, H. Y. Zhang, Y. Q. Wang, Q. Ouyang, X. T. Huang, G. Rong, S. S. Fang, T. Hussain, G. F. Chen, J. Y. Zhang, H. W. Wen, Y. B. Liu, Huanhuan Liu, X. Y. Ma, W. X. Gong, C. H. Li, X. H. Sun, M. Destefanis, X. L. Gao, C. Dong, S. Sosio, G. Felici, Y. K. Heng, S. J. Zhao, H. J. Li, X. H. Li, Q. L. Xiu, S. L. Yang, Q. J. Xu, Xingchao Dai, G. R. Liao, J. C. Chen, Xuanhong Lou, Viktor Thorén, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, J. Min, I. Balossino, J. F. Sun, H. B. Liu, Joachim Pettersson, S. Marcello, B. Kopf, Y. Zeng, Y. J. Lin, Zhe Sun, S. Lusso, K. L. He, S. W. Han, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, J. J. Song, L. Sun, X. Tang, Jimin Zhao, P. L. Li, H. J. Lu, J. G. Lu, M. Kuemmel, M. Rolo, X. F. Cui, C. F. Redmer, G. S. Huang, W. J. Zhu, X. D. Shi, M. Bertani, Dan Wang, S. Gu, L. Yang, F. Cossio, F. E. Maas, T. Hu, X. L. Li, Y. T. Tan, W. Gradl, O. Bakina, P. X. Shen, Z. Wu, Zhiqing Zhang, Lingxuan Zhang, and X. P. Qin

Subjects
Nuclear physics, Physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Detector, 010306 general physics, 01 natural sciences, Storage ring
Abstract

The cross section of the process e+e-→η′J/ψ is measured at center-of-mass (c.m.) energies from s=4.178 to 4.600 GeV using data samples corresponding to a total integrated luminosity of 11 fb-1 collected with the BESIII detector operating at the BEPCII storage ring. The dependence of the cross section on s shows an enhancement around 4.2 GeV. While the shape of the cross section cannot be fully explained with a single ψ(4160) or ψ(4260) state, a coherent sum of the two states does provide a reasonable description of the data.

Published
2020
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33. Inverted-V Electron Acceleration Events Concurring With Localized Auroral Observations at Mars by MAVEN

Author

Sonal Jain, Christopher M. Fowler, Nicholas M. Schneider, Tristan Weber, David Brain, James P. McFadden, Matthew Fillingim, David L. Mitchell, Christian Mazelle, Jared Espley, Robert Lillis, Shaosui Xu, Laila Andersson, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, field-aligned potential, inverted-V electron, Mars, MAVEN, Magnetic reconnection, Mars Exploration Program, Astrophysics, aurora, Geophysics, Electron acceleration, [SDU]Sciences of the Universe [physics], magnetic reconnection, General Earth and Planetary Sciences
Abstract

International audience; From February to March 2019, the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft repeatedly observed aurora near periapsis over Mars' southern strong crustal fields. During these orbits, the Solar Wind Electron Analyzer observed accelerated electrons at similar locations to where the auroras were observed, resembling the inverted-V structure observed near Earth's auroral region. In this study, we present a case study of such an acceleration event, where we estimate a field-aligned electrostatic potential drop of ∼440 V. We determine the field-aligned current from the observed magnetic perturbation reaches 1.1 μA/m2, agreeing reasonably well with the estimated net electron current carried by acceleration electrons with a maximum of 2.5 μA/m2. Similar to Earth, the potential drop develops when the ambient plasma cannot sustain the imposed field-aligned current. We also estimate the potential layer to be located above 750- to 850-km altitude and the associated electric field to be ∼0.6 V/m.

Published
2020
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34. Investigation of Martian Magnetic Topology Response to 2017 September ICME

Author

Christian Mazelle, Tristan Weber, Christina O. Lee, David Brain, Yingjuan Ma, D. L. Mitchell, Xiaohua Fang, Shaosui Xu, Shannon Curry, Janet G. Luhmann, Gina A. DiBraccio, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
Martian, 010504 meteorology & atmospheric sciences, Mars, Mars Exploration Program, 01 natural sciences, ICME, Astrobiology, Geophysics, [SDU]Sciences of the Universe [physics], Physics::Space Physics, 0103 physical sciences, General Earth and Planetary Sciences, Astrophysics::Earth and Planetary Astrophysics, magnetic topology, 010303 astronomy & astrophysics, Geology, Topology (chemistry), 0105 earth and related environmental sciences
Abstract

International audience; Many aspects of the Sun-Mars interaction have been investigated during solar transient events with measurements from multiple spacecrafts and also simulation efforts. Limited discussion has been paid to magnetic topology response to disturbed upstream conditions. The implications of topology changes include, but are not limited to, the pattern of energetic particle precipitation into the Martian atmosphere and the impact on cold ion escape during solar transient events as low-energy ion escape is dependent on magnetic topology. In this study, we investigate the magnetic topology response to the 2017 September interplanetary coronal mass ejection (ICME) event with measurements collected by the Mars Atmospheric and Volatile EvolutioN spacecraft. It is found that the interface between draped interplanetary magnetic field and closed field lines was moved from 800-1400 km in altitude during quiet conditions to 200-400 km after ICME arrived at Mars and then relaxed back to high altitudes again after the event. To gain insight into magnetic topology response on a global scale, we first validate magnetic topology from a time-dependent simulation with a single-fluid multispecies magnetohydrodynamic (MHD) model by comparing magnetic topology determined from Mars Atmospheric and Volatile EvolutioN data, which shows a good agreement. Then we present MHD predictions of global magnetic topology changes during this ICME event. In addition to a deeper interplanetary magnetic field penetration, MHD results suggest more open field lines in response to the ICME event.

Published
2018
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35. Ionizing Electrons on the Martian Nightside: Structure and Variability

Author

John E. P. Connerney, David Brain, Tristan Weber, Robert Lillis, Shaosui Xu, Meredith Elrod, Frank Eparvier, D. L. Mitchell, Jasper Halekas, Edward Thiemann, Morgane Steckiewicz, Jared Espley, Mehdi Benna, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)

Subjects
electron, Martian, 010504 meteorology & atmospheric sciences, ionizing, variability, Mars, Mars Exploration Program, Electron, 01 natural sciences, nightside, Ionizing radiation, Astrobiology, Geophysics, [SDU]Sciences of the Universe [physics], Space and Planetary Science, Physics::Space Physics, 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, Environmental science, Astrophysics::Earth and Planetary Astrophysics, structure, 010303 astronomy & astrophysics, Physics::Atmospheric and Oceanic Physics, 0105 earth and related environmental sciences
Abstract

International audience; The precipitation of suprathermal electrons is the dominant external source of energy deposition and ionization in the Martian nightside upper atmosphere and ionosphere. We investigate the spatial patterns and variability of ionizing electrons from 115 to 600 km altitude on the Martian nightside, using CO2 electron impact ionization frequency (EIIF) as our metric, examining more than 3 years of data collected in situ by the Mars Atmosphere and Volatile EvolutioN spacecraft. We characterize the behavior of EIIF with respect to altitude, solar zenith angle, solar wind pressure, and the geometry and strength of crustal magnetic fields. EIIF has a complex and correlated dependence on these factors, but we find that it generally increases with altitude and solar wind pressure, decreases with crustal magnetic field strength and does not depend detectably on solar zenith angle past 115°. The dependence is governed by (a) energy degradation and backscatter by collisions with atmospheric neutrals below 220 km and (b) magnetic field topology that permits or retards electron access to certain regions. This field topology is dynamic and varies with solar wind conditions, allowing greater electron access at higher altitudes where crustal fields are weaker and also for higher solar wind pressures, which result in stronger draped magnetic fields that push closed crustal magnetic field loops to lower altitudes. This multidimensional electron flux behavior can in the future be parameterized in an empirical model for use as input to global simulations of the nightside upper atmosphere, which currently do not account for this important source of energy.

Published
2018
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37. Study of the decays ψ(3686)→γχcJ→γp¯K*+Λ+c.c. and ψ(3686)→p¯K*+Λ+c.c

Author

S. Qian, Q. An, Jialun Ping, K. Zhang, X. Y. Zhang, X. L. Wang, J. B. Liu, Y. J. Sun, Yifan Yang, Y. H. Zheng, Cong-Feng Qiao, Y. P. Lu, L. J. Wu, N. Yu. Muchnoi, X. S. Kang, Y. H. Zhang, Xujin Yuan, Y. J. Mo, X. L. Gao, M. G. Zhao, Y. H. Yang, S. L. Olsen, Tao Luo, X. X. Ma, R. P. Guo, J. Zhu, S. B. Liu, Y. Nefedov, Z. Y. Wang, B. X. Yu, Q. Liu, Tristan Weber, Xiang-Gan Liu, Q. P. Ji, I. R. Boyko, L. L. Ma, M. Savri, Shulei Zhang, C. Dong, F. Li, Liqing Xu, X. Y. Shen, W. Imoehl, F. C. Ma, L. Gong, L. G. Xia, S. Sosio, Zongyuan Wang, X. H. Liu, Y. Ding, F. Y. Li, H. S. Chen, Alperen Yuncu, H. Liang, G. Y. Tang, B. J. Liu, H. L. Dai, A. Amoroso, T. Y. Xing, D. Y. Chen, J. P. Dai, A. Dbeyssi, X. L. Ji, Jie Zhao, D. X. Lin, Joachim Pettersson, L. Koch, A. Khoukaz, Q. Q. Song, Y. H. Xie, W. Kühn, Z. Y. You, T. Liu, J. F. Qiu, Y. P. Guo, D. Y. Liu, Serkant Ali Cetin, J. B. Jiao, Alexey Zhemchugov, H. M. Hu, Angelo Rivetti, M. Papenbrock, R. Baldini Ferroli, Z. A. Zhu, L. Fava, Z. G. Wang, H. Y. Zhang, Z. Y. Zhang, F. H. Liu, Nicolas Berger, A. Q. Guo, C. W. Wang, F. Nerling, Q. Ouyang, Krisztian Peters, S. Malde, M. Z. Wang, X. H. Mo, L. S. Wang, X. Tang, Ke Liu, S. S. Fang, F. De Mori, J. W. Zhang, C. P. Shen, G. F. Chen, M. H. Ye, M. Rolo, S. Ahmed, J. Y. Zhang, Yang Zhang, X. N. Li, Y. B. Liu, Fang Liu, M. Maggiora, Ling Zhao, Y. X. Yang, Li Zhou, U. Wiedner, H. W. Wen, F. Cossio, Haiping Peng, Q. A. Malik, G. Mezzadri, Lei Zhao, W. C. Yan, K. J. Zhu, E. M. Gersabeck, Guy Wilkinson, L. L. Wang, H. Cai, Z. L. Dou, Y. K. Heng, Jacek Biernat, X. L. Luo, X. F. Wang, Z. L. Hou, M. Alekseev, S. J. Zhao, I. B. Nikolaev, J. Min, P. L. Wang, I. Denysenko, W. S. Cheng, Yao Zhang, G. Li, Ke Wang, X. Q. Hao, L. M. Gu, M. N. Achasov, J. H. Yin, L. P. Zhou, S. Nakhoul, Q. M. Ma, K. Begzsuren, Yunlong Zhang, Meng Wang, Muhammad Irshad, A. Mustafa, W. P. Wang, F. Bianchi, M. Shao, Y. T. Gu, M. M. Ma, Z. P. Mao, Y. Yuan, D. Bettoni, J. L. Zhang, P. Larin, Q. J. Xu, Y. S. Zhu, Yu Zhang, H. B. Liu, J. C. Chen, Xuanhong Lou, Xiao-Rui Lyu, Viktor Thorén, R. Poling, H. L. Jiang, Lingxuan Zhang, Jianping Zheng, J. Fang, F. H. Heinsius, B. Y. Zhang, Fenfen An, F. A. Harris, W. L. Chang, C. D. Fu, Nasser Kalantar-Nayestanaki, C. Q. Feng, C. Morales Morales, R. Kappert, Yue Pan, B. L. Wang, H. J. Lu, J. G. Lu, S. X. Du, T. C. Zhao, Huanhuan Liu, K. Y. Liu, H. Leithoff, G. Felici, Z. Y. Deng, M. Ripka, Q. Zhao, A. Sarantsev, Matthew Glenn Kurth, D. H. Wei, P. R. Li, J. S. Lange, Ch. Rosner, M. Destefanis, C. Z. Yuan, N. Cao, B. Kopf, T. Y. Qi, Y. Z. Sun, Xingguo Li, J. Libby, Z. H. Qin, J. Bloms, R. Kliemt, H. J. Li, X. P. Qin, Yaquan Fang, Shou-hua Zhu, A. Mangoni, I. K. Keshk, Y. X. Xia, X. H. Li, A. Guskov, Jie Yu, Q. L. Xiu, X. K. Zhou, Xingchao Dai, K. L. He, L. Y. Dong, C. X. Lin, T. J. Min, Alexander Leon Gilman, M. Rump, Gang Zhao, F. F. Sui, M. H. Gu, R. Kiuchi, W. G. Li, A. G. Denig, S. W. Han, G. F. Xu, Y. G. Gao, K. Schoenning, Q. Y. Li, B. S. Zou, Bibo Ke, W. B. Yan, G. Cibinetto, P. W. Luo, M. Kuessner, Z. X. Meng, Y. K. Sun, Xiaoyu Zhou, Zhang Li, F. E. Maas, S. Jin, X. N. Ma, X. A. Xiong, J. Y. Liu, J. Chai, H. Y. Sheng, V. Rodin, G. X. Sun, J. V. Bennett, Li Yan, S. Pacetti, T. Hu, X. P. Xu, X. B. Ji, P. Patteri, G. A. Chelkov, A. A. Zafar, N. Huesken, C. X. Yu, S. Spataro, Q. Gao, Y. N. Gao, Jimin Zhao, P. L. Li, Z. Jiao, Ke Li, Lei Li, D. H. Zhang, Y. Zhang, M. Fritsch, M. Y. Dong, Yuehong Xie, Feng Yan, H. M. Liu, M. Kavatsyuk, J. Z. Fan, J. F. Hu, C. Sowa, J. H. Zou, Y. B. Zhao, B. Zheng, R. G. Ping, O. Bakina, G. F. Cao, S. S. Sun, B. X. Zhang, X D Shi, W. Shan, K. H. Rashid, C. F. Redmer, T. Khan, Z. A. Liu, R. Farinelli, Y. J. Mao, H. X. Yang, I. Garzia, J. Dong, V. Prasad, M. Qi, H. J. Yang, P. X. Shen, R. E. Mitchell, Y. Ban, P. Weidenkaff, F. Feldbauer, B. Garillon, H. L. Ma, Huihui Liu, T. Lenz, Feng Liu, X. Y. Song, Z. Wu, J. G. Messchendorp, M. Ablikim, D. M. Li, X. Y. Jiang, S. P. Wen, H. Muramatsu, X. S. Qin, X. R. Zhou, Y. T. Liang, M. Pelizaeus, S. J. Chen, Cheng Li, S. Nisar, Zhiqing Zhang, A. Calcaterra, Z. G. Zhao, L. Z. Liao, C. J. Tang, Y. Hu, Yu Bai, H. H. Zhang, Z. J. Sun, J. J. Xu, M. Kuemmel, M. Albrecht, Z. Q. Yang, S. Maldaner, X. F. Cui, Y. Q. Ma, L. H. Wu, Jun-Yi Zhang, W. D. Li, J. S. Huang, J. Q. Zhang, J. C. Li, B. T. Tsednee, Yi Jin, Z. P. Zhang, C. X. Liu, J. W. Li, R. M. Wang, Zujian Wang, Y. J. Xiao, J. Zhuang, M. X. Luo, Y. Fu, W. J. Zhu, M. Bertani, L. Yang, X. D. Shi, Dan Wang, Y. H. Yan, K. Goetzen, D. V. Dedovich, J. W. Zhao, S. Gu, Y. C. Zhu, Xu Zhou, J. F. Sun, T. Held, Mario Greco, S. Marcello, J. D. Lu, Y. Zeng, Y. J. Lin, Y. T. Tan, W. Gradl, Zhe Sun, S. Lusso, X. T. Huang, G. Rong, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, H. B. Li, J. J. Song, L. Sun, C. L. Luo, Q. Zhou, C. C. Zhang, B. Zhong, L. B. Guo, S. L. Yang, G. R. Liao, A. N. Zhu, Tao Zhang, B. Q. Wang, Xu Shan, Zhiqing Liu, T. Johansson, J. F. Chang, Y. F. Wang, O. B. Kolcu, X. Cai, L. Lavezzi, M. Richter, Z. Ning, S. Y. Xiao, I. Uman, Z. Gao, S. L. Niu, X. Q. Li, Y. F. Long, Z. J. Xiao, K. Ravindran, Yi Zhang, Xiaozhong Huang, Mingshui Chen, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, Andrzej Kupsc, P. Kiese, Yuan Hou, R. A. Briere, G. S. Huang, X. S. Jiang, Magnus Wolke, Y. F. Liang, D. P. Jin, N. Qin, R. X. Yang, H. H. Wang, Wei Xu, A. Pitka, P. Adlarson, T. Hussain, X. Y. Ma, W. X. Gong, C. H. Li, and X. H. Sun

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Astrophysics::High Energy Astrophysical Phenomena, High Energy Physics::Phenomenology, Astrophysics::Cosmology and Extragalactic Astrophysics, Lambda, 01 natural sciences, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Astrophysics::Galaxy Astrophysics, Bar (unit)
Abstract

Based on the data sample of $448.1\times10^{6}$ $\psi(3686)$ events collected with the BESIII detector at BEPCII, we present a study of the decays $\psi(3686)\rightarrow\gamma\chi_{cJ}\rightarrow\gamma\bar{p}K^{*+}\Lambda+c.c.$ and $\psi(3686)\rightarrow\bar{p}K^{*+}\Lambda+c.c.$. The branching fractions of $\chi_{cJ}\rightarrow\bar{p}K^{*+}\Lambda+c.c.$ ($J$=0, 1, 2) are measured to be $(4.8\pm0.7\pm0.5)\times10^{-4}$, $(5.0\pm0.5\pm0.4)\times10^{-4}$, and $(8.2\pm0.9\pm0.7)\times10^{-4}$, respectively, where the first uncertainties are statistical and the second systematic. The branching fraction of $\psi(3686)\rightarrow\bar{p}K^{*+}\Lambda+c.c.$ is measured to be $(6.3\pm0.5\pm0.5)\times10^{-5}$. All these decay modes are observed for the first time.

Published
2019
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38. Cross section measurements of e+e−→K+K−K+K− and ϕK+K− at center-of-mass energies from 2.10 to 3.08 GeV

Author

J. F. Sun, R. Kliemt, L. Koch, Y. Fu, A. Khoukaz, A. Mangoni, A. Guskov, Y. H. Yan, Jie Yu, J. W. Zhao, E. M. Gersabeck, Y. C. Zhu, Xujin Yuan, F. F. Sui, R. Baldini Ferroli, M. H. Gu, L. J. Wu, Y. H. Xie, M. Maggiora, Ling Zhao, Lei Zhao, Z. L. Hou, T. J. Min, K. J. Zhu, S. B. Liu, C. Z. Yuan, N. Cao, Krisztian Peters, S. Malde, Y. Nefedov, X. Tang, M. Z. Wang, G. Cibinetto, S. Marcello, Y. Zeng, Y. J. Lin, Zhe Sun, S. Lusso, T. Held, R. Kiuchi, H. Y. Sheng, Y. J. Mo, M. Rolo, X. N. Li, Q. A. Malik, G. Mezzadri, W. C. Yan, L. M. Gu, M. N. Achasov, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Haiping Peng, J. Q. Zhang, X. L. Luo, K. Begzsuren, W. P. Wang, F. Bianchi, P. W. Luo, M. Y. Dong, F. Cossio, S. Ahmed, Y. X. Yang, C. X. Yu, R. Kappert, L. P. Zhou, Y. M. Ma, Z. P. Mao, M. Kuessner, Ke Wang, G. A. Chelkov, Zhang Li, H. J. Lu, J. G. Lu, X. L. Gao, L. H. Wu, M. Savrie, M. Albrecht, W. D. Li, J. Min, R. Poling, G. Y. Tang, B. T. Tsednee, V. Rodin, F. H. Heinsius, C. Dong, S. Sosio, Fenfen An, F. E. Maas, T. Hu, B. Zheng, R. G. Ping, J. H. Zou, G. F. Xu, Xiang-Gan Liu, Q. P. Ji, J. Fang, Yi Jin, B. L. Wang, D. Y. Liu, J. B. Jiao, S. S. Sun, X. P. Xu, X. B. Ji, W. G. Li, A. G. Denig, Y. K. Sun, Xiaoyu Zhou, H. B. Liu, J. J. Song, L. Sun, J. W. Li, J. C. Li, B. Kopf, F. Li, T. C. Zhao, P. Patteri, X. L. Li, P. Kiese, O. Bakina, Joachim Pettersson, Q. Zhao, S. Spataro, F. C. Ma, Y. Z. Sun, R. M. Wang, I. R. Boyko, S. Jin, Ch. Rosner, Yuan Hou, L. Y. Liu, Y. J. Xiao, Huanhuan Liu, G. Felici, M. H. Ye, K. L. He, Tao Luo, G. Wilkinson, S. W. Han, Jie Zhao, D. X. Lin, Z. X. Meng, X. A. Xiong, P. X. Shen, Z. Wu, Yunlong Zhang, D. Bettoni, J. Zhuang, I. K. Keshk, M. X. Luo, J. L. Zhang, B. X. Yu, M. Richter, Liqing Xu, X. Y. Shen, Z. Ning, S. Y. Xiao, W. S. Cheng, R. E. Mitchell, Yao Zhang, G. Li, J. Libby, R. A. Briere, A. A. Zafar, Yaquan Fang, M. Greco, Q. Liu, Shou-hua Zhu, Tristan Weber, Jimin Zhao, P. L. Li, H. L. Jiang, Xiao-Rui Lyu, Zhiqing Zhang, Lei Li, Fang Liu, D. V. Dedovich, C. D. Fu, Xu Zhou, U. Wiedner, X. K. Zhou, C. Q. Feng, I. Denysenko, K. H. Rashid, Y. Ding, Z. Y. Deng, Shulei Zhang, F. Y. Li, H. S. Chen, Alperen Yuncu, H. L. Dai, H. M. Liu, J. F. Hu, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, H. J. Li, X. S. Jiang, C. F. Redmer, M. Bertani, Jianping Zheng, S. X. Du, K. Y. Liu, Lingxuan Zhang, M. Destefanis, X. Y. Song, L. Y. Dong, L. L. Ma, L. Gong, B. J. Liu, L. G. Xia, J. Y. Liu, Alexey Zhemchugov, H. M. Hu, F. H. Liu, Nicolas Berger, B. Y. Zhang, X. H. Li, T. Y. Xing, D. Y. Chen, K. Schoenning, Q. Y. Li, I. Balossino Balossino, B. S. Zou, Q. L. Xiu, L. Yang, Y. T. Liang, Xingchao Dai, G. F. Cao, X. P. Qin, Zhiqing Liu, S. J. Chen, X. N. Ma, S. Qian, Q. An, Jialun Ping, W. Kühn, H. B. Li, Magnus Wolke, Y. F. Liang, C. L. Luo, Q. Zhou, Z. Y. You, Z. A. Zhu, A. Q. Guo, Zongyuan Wang, C. W. Wang, D. P. Jin, A. Amoroso, K. Zhang, H. Liang, Z. A. Liu, T. Johansson, J. F. Chang, Q. Gao, Y. N. Gao, Bibo Ke, Y. T. Tan, J. J. Xu, Y. F. Wang, Z. Q. Yang, X. Y. Zhang, O. B. Kolcu, V. Prasad, R. X. Yang, H. H. Wang, J. W. Zhang, Wei Xu, W. B. Yan, C. C. Zhang, Y. Zhang, B. Zhong, L. B. Guo, X. L. Wang, W. Gradl, Y. H. Zheng, Y. Ban, Feng Yan, X. Cai, P. Weidenkaff, S. L. Yang, L. Lavezzi, S. Pacetti, M. Qi, J. Z. Fan, T. Liu, J. F. Qiu, M. Papenbrock, I. B. Nikolaev, M.G. Alekseev, A. Pitka, P. Adlarson, J. B. Liu, C. P. Shen, N. Huesken, J. H. Yin, A. N. Zhu, B. Wang, Y. J. Sun, Yifan Yang, Q. Ouyang, N. Qin, M. Shao, Y. T. Gu, Tao Zhang, H. J. Yang, S. P. Wen, X. S. Qin, S. S. Fang, A. Dbeyssi, M. Fritsch, X. R. Zhou, Z. H. Wang, G. R. Liao, J. Bloms, Ke Li, Cheng Li, J. S. Huang, C. X. Liu, L. Fava, Xu Shan, Ke Liu, Y. B. Liu, Y. P. Lu, M. Kavatsyuk, R. Farinelli, J. D. Lu, A. Sarantsev, Matthew Glenn Kurth, D. H. Wei, P. R. Li, Z. H. Qin, I. Uman, J. S. Lange, A. Calcaterra, Z. G. Zhao, L. Z. Liao, Angelo Rivetti, Z. Gao, X. T. Huang, G. Rong, H. L. Ma, M. Kuemmel, D. M. Li, K. Goetzen, X D Shi, Yu Bai, H. H. Zhang, X. L. Ji, H. Muramatsu, X. F. Cui, Y. J. Mao, Z. J. Sun, F. Nerling, H. X. Yang, I. Garzia, S. L. Niu, S. Maldaner, X. H. Mo, L. S. Wang, M. Pelizaeus, Z. J. Xiao, F. De Mori, G. S. Huang, Y. F. Long, L. L. Wang, H. Cai, B. Garillon, B. X. Zhang, W. J. Zhu, Huihui Liu, Z. Y. Zhang, Jacek Biernat, X. D. Shi, Dan Wang, S. Gu, J. G. Messchendorp, X. Q. Hao, Q. Q. Song, Xiaozhong Huang, S. Nakhoul, Y. G. Xie, Yang Zhang, Li Zhou, Y. P. Guo, Z. L. Dou, Andrzej Kupsc, Yi Zhang, F. Feldbauer, Serkant Ali Cetin, M. L. Chen, X. F. Wang, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, Feng Liu, P. Larin, M. Ablikim, X. Y. Jiang, Q. M. Ma, P. L. Wang, A. Mustafa, T. Hussain, Meng Wang, Muhammad Irshad, X. Y. Ma, W. X. Gong, Y. Yuan, Y. S. Zhu, Yu Zhang, C. H. Li, X. H. Sun, F. A. Harris, W. L. Chang, T. Y. Qi, Z. P. Zhang, H. Leithoff, M. Himmelreich, Y. X. Xia, Y. G. Gao, M. M. Ma, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, D. H. Zhang, C. Sowa, Y. B. Zhao, W. Shan, J. Dong, S. Nisar, C. J. Tang, Y. Hu, Jun-Yi Zhang, Z. G. Wang, Cong-Feng Qiao, H. Y. Zhang, Zujian Wang, N. Yu. Muchnoi, X. S. Kang, Y. H. Zhang, G. F. Chen, S. L. Olsen, Z. Y. Wang, J. Y. Zhang, Teresa Lenz, W. Imoehl, X. H. Liu, J. P. Dai, H. W. Wen, Y. K. Heng, S. J. Zhao, Q. J. Xu, J. C. Chen, Xuanhong Lou, Viktor Thorén, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, and J. Zhu

Subjects
Physics, 010308 nuclear & particles physics, Electron–positron annihilation, Analytical chemistry, Lambda, 01 natural sciences, law.invention, Cross section (geometry), law, 0103 physical sciences, High Energy Physics::Experiment, Center of mass, 010306 general physics, Collider, Bar (unit)
Abstract

We measure the Born cross sections of the process e(+)e(-) -> K+ K- K+ K- at center-of-mass (c.m.) energies, root s, between 2.100 and 3.080 GeV. The data were collected using the BESIII detector at the BEPCII collider. An enhancement at root s = 2.232 GeV is observed, very close to the e(+)e(-) -> Lambda(Lambda) over bar production threshold. A similar enhancement at the same c.m. energy is observed in the e(+)e(-) -> phi K+ K- cross section. The energy dependence of the K+ K- K+ K- and phi K+ K- cross sections differs significantly from that of e(+)e(-) -> phi pi(+)pi(-).

Published
2019
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39. Partial-wave analysis of J/ψ→K+K−π0

Author

M. Maggiora, Ling Zhao, G. Y. Tang, Lei Zhao, Z. L. Hou, Zongyuan Wang, J. J. Xu, Z. Q. Yang, Bibo Ke, W. B. Yan, Jie Zhao, D. X. Lin, P. W. Luo, Alexey Zhemchugov, H. M. Hu, L. J. Wu, S. Pacetti, J. S. Huang, C. X. Liu, F. H. Liu, Nicolas Berger, Y. Schelhaas, Q. Ouyang, Xiao-Rui Lyu, Y. J. Mo, Zhang Li, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, Ke Wang, H. B. Li, C. L. Luo, N. Huesken, Z. A. Liu, V. Prasad, Y. Ban, P. Weidenkaff, J. F. Sun, S. P. Wen, X. S. Qin, X. R. Zhou, Cheng Li, P. Kiese, Yuan Hou, H. J. Lu, J. G. Lu, S. S. Fang, H. R. Qi, Q. Q. Song, V. Rodin, C. Z. Yuan, N. Cao, X. P. Xu, X. B. Ji, J. W. Zhang, R. A. Briere, Z. G. Wang, H. Y. Zhang, Xiang-Gan Liu, A. Q. Guo, C. W. Wang, Q. Zhou, C. C. Zhang, B. Zhong, L. B. Guo, Lei Li, M.G. Alekseev, A. N. Zhu, Ke Li, M. H. Ye, X. S. Jiang, Y. P. Guo, P. Patteri, Q. P. Ji, R. Poling, F. H. Heinsius, S. Marcello, Y. Zeng, Y. J. Lin, Zhe Sun, S. Lusso, Q. A. Malik, G. Mezzadri, W. C. Yan, L. H. Wu, R. X. Yang, Wei Xu, A. Pitka, P. Adlarson, Serkant Ali Cetin, J. Min, Lingxuan Zhang, F. E. Maas, T. Hu, Y. B. Liu, Huanhuan Liu, G. F. Chen, I. R. Boyko, Fenfen An, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Q. Liu, Tristan Weber, Jun-Yi Zhang, Tao Zhang, Xu Shan, Liqing Xu, X. Y. Shen, R. Farinelli, Y. F. Wang, J. J. Song, L. Sun, J. Y. Zhang, L. L. Ma, M. Savrie, K. Goetzen, X. P. Qin, F. F. Sui, L. Gong, M. H. Gu, R. Kiuchi, B. L. Wang, T. C. Zhao, H. Y. Sheng, C. X. Yu, B. Zheng, R. G. Ping, L. M. Gu, M. N. Achasov, X. L. Li, Yi Jin, J. Bloms, L. P. Zhou, L. G. Xia, A. Amoroso, H. B. Liu, M. Y. Dong, F. Li, F. C. Ma, Xujin Yuan, O. Bakina, S. B. Liu, Y. H. Zheng, Cong-Feng Qiao, R. Kliemt, T. Hussain, X. Y. Ma, S. Qian, Z. H. Qin, Q. An, Jialun Ping, W. X. Gong, G. Felici, M. Richter, Z. Ning, S. Y. Xiao, H. W. Wen, X. Q. Hao, B. Kopf, Y. M. Ma, K. L. He, J. W. Li, H. L. Ma, R. M. Wang, Z. P. Mao, D. M. Li, Y. J. Xiao, A. Dbeyssi, S. L. Yang, Y. Nefedov, Y. Ding, L. Y. Dong, A. Calcaterra, Z. G. Zhao, G. R. Liao, X. N. Ma, B. J. Liu, J. H. Zou, N. Yu. Muchnoi, X. S. Kang, Xiaozhong Huang, K. Zhang, X. Y. Zhang, X D Shi, X. L. Wang, Y. J. Mao, S. S. Sun, Y. K. Heng, L. Z. Liao, Yunlong Zhang, T. Y. Xing, D. Y. Chen, H. X. Yang, C. H. Li, X. H. Sun, Angelo Rivetti, S. Nakhoul, Z. Gao, S. L. Niu, J. B. Liu, X. K. Zhou, R. Kappert, M. Kuessner, Z. X. Meng, X. A. Xiong, H. J. Li, P. X. Shen, Z. Wu, A. A. Zafar, Yu Bai, H. H. Zhang, M. Kuemmel, Matthew Glenn Kurth, F. De Mori, B. Wang, M. Fritsch, Zujian Wang, T. Liu, J. F. Qiu, M. Papenbrock, W. Kühn, M. Kavatsyuk, L. Fava, F. Nerling, Z. J. Sun, S. Maldaner, H. Muramatsu, I. Garzia, Y. H. Zhang, S. L. Olsen, D. Bettoni, Y. J. Sun, Yifan Yang, Y. P. Lu, Tao Luo, S. W. Han, X. H. Li, B. Garillon, B. X. Yu, A. Mangoni, A. Guskov, J. L. Zhang, H. L. Jiang, Jianping Zheng, Jie Yu, P. Larin, Q. L. Xiu, Y. F. Long, K. Ravindran, Huihui Liu, M. Z. Wang, M. Albrecht, J. Fang, Ch. Rosner, X. F. Cui, G. A. Chelkov, M. Pelizaeus, S. Ahmed, Y. X. Yang, Zhiqing Zhang, Jimin Zhao, P. L. Li, Xingchao Dai, Yi Zhang, J. C. Li, Z. Y. You, Z. A. Zhu, K. H. Rashid, B. X. Zhang, Z. Y. Wang, Teresa Lenz, Zhiqing Liu, R. E. Mitchell, T. Johansson, D. Y. Liu, J. B. Jiao, S. Q. Qu, Z. B. Li, J. G. Messchendorp, G. F. Xu, J. F. Chang, X. F. Wang, S. X. Du, Yang Zhang, S. Jin, W. Ikegami Andersson, Fang Liu, K. Y. Liu, H. Liang, J. Zhuang, C. F. Redmer, G. S. Huang, W. D. Li, M. X. Luo, M. Qi, Y. T. Liang, D. V. Dedovich, Q. M. Ma, H. J. Yang, A. Mustafa, Shulei Zhang, C. P. Shen, E. M. Gersabeck, I. B. Nikolaev, X. L. Ji, F. Y. Li, T. J. Min, K. J. Zhu, H. S. Chen, Alperen Yuncu, J. H. Yin, G. Cibinetto, U. Wiedner, I. Denysenko, M. Destefanis, B. T. Tsednee, O. B. Kolcu, W. J. Zhu, C. Sowa, Andrzej Kupsc, W. Imoehl, Xu Zhou, X. D. Shi, Dan Wang, S. J. Chen, M. Shao, Y. T. Gu, S. Gu, Y. Yuan, Y. S. Zhu, F. Feldbauer, X. H. Liu, Z. Y. Zhang, Y. G. Xie, Li Zhou, Y. B. Zhao, Z. L. Dou, X. Cai, W. Shan, L. Lavezzi, Yu Zhang, X. L. Luo, W. G. Li, A. G. Denig, Y. K. Sun, Xiaoyu Zhou, T. Y. Qi, X. Tang, Y. Fu, P. L. Wang, H. L. Dai, Q. Zhao, Feng Liu, M. Ablikim, X. Y. Jiang, M. Himmelreich, J. Dong, X. Y. Song, Meng Wang, Muhammad Irshad, S. Spataro, M. L. Chen, J. P. Dai, G. Wilkinson, B. Y. Zhang, M. Rolo, Y. H. Yan, K. Begzsuren, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Y. Z. Sun, L. Koch, Y. X. Xia, W. P. Wang, F. Bianchi, S. Nisar, A. Khoukaz, J. W. Zhao, Ke Liu, R. Baldini Ferroli, C. J. Tang, J. D. Lu, I. K. Keshk, X. T. Huang, M. Bertani, Y. C. Zhu, T. Yu, Y. Hu, H. M. Liu, W. S. Cheng, J. F. Hu, Yao Zhang, F. Cossio, J. Libby, Krisztian Peters, S. Malde, J. Q. Zhang, G. Rong, F. A. Harris, G. Li, W. L. Chang, L. Yang, G. F. Cao, Yaquan Fang, M. Greco, Shou-hua Zhu, X. N. Li, X. H. Mo, L. S. Wang, Z. P. Zhang, H. Leithoff, C. X. Lin, Alexander Leon Gilman, X. L. Gao, T. Held, Haiping Peng, Y. T. Tan, M. Rump, Gang Zhao, W. Gradl, L. L. Wang, H. Cai, Y. G. Gao, C. Dong, Jacek Biernat, C. D. Fu, C. Q. Feng, S. Sosio, Z. Y. Deng, K. Schoenning, Q. Y. Li, B. S. Zou, Joachim Pettersson, M. M. Ma, J. Y. Liu, L. Y. Liu, Q. Gao, Y. N. Gao, Y. Zhang, Feng Yan, J. Z. Fan, I. Uman, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Z. J. Xiao, Z. Jiao, D. H. Zhang, Magnus Wolke, Y. F. Liang, D. P. Jin, N. Qin, S. J. Zhao, Q. J. Xu, J. C. Chen, Xuanhong Lou, Viktor Thorén, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, I. Balossino, and Y. H. Xie

Subjects
Physics, Nuclear physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, 0103 physical sciences, Detector, Pi, Resonance, 010306 general physics, Branching (polymer chemistry), 01 natural sciences
Abstract

A partial-wave analysis of the decay J/ψ→K+K-π0 has been made using (223.7±1.4)×106 J/ψ events collected with the BESIII detector in 2009. The analysis, which is performed within the isobar-model approach, reveals contributions from K2*(1430)±, K2*(1980)± and K4*(2045)± decaying to K±π0. The two latter states are observed in J/ψ decays for the first time. Two resonance signals decaying to K+K- are also observed. These contributions cannot be reliably identified and their possible interpretations are discussed. The measured branching fraction B(J/ψ→K+K-π0) of (2.88±0.01±0.12)×10-3 is more precise than previous results. Branching fractions for the reported contributions are presented as well. The results of the partial-wave analysis differ significantly from those previously obtained by BESII and BABAR.

Published
2019
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40. Observation of e+e−→π+π−ψ(3770) and D1(2420)0D¯0+c.c

Author

D. Y. Liu, J. B. Jiao, F. Li, F. C. Ma, M. Qi, M. H. Ye, H. J. Yang, E. M. Gersabeck, X. L. Luo, X D Shi, X. L. Ji, T. Liu, J. F. Qiu, M. Papenbrock, Y. J. Mao, H. X. Yang, L. Fava, F. Nerling, I. Garzia, K. Begzsuren, L. Y. Dong, W. P. Wang, F. Bianchi, Yang Zhang, B. Garillon, M. Richter, Z. Y. Zhang, Huihui Liu, Z. Ning, S. Y. Xiao, F. F. Sui, Xujin Yuan, Tao Luo, M. H. Gu, R. Kiuchi, J. G. Messchendorp, H. J. Lu, J. G. Lu, S. B. Liu, H. Y. Sheng, L. Y. Liu, Y. Nefedov, C. X. Yu, Q. A. Malik, K. Goetzen, F. De Mori, B. X. Yu, X. K. Zhou, F. E. Maas, B. Zheng, R. G. Ping, W. G. Li, A. G. Denig, Y. K. Sun, Y. G. Xie, M. Y. Dong, Y. Ding, B. J. Liu, T. Y. Xing, D. Y. Chen, W. Kühn, T. Hu, Z. Y. You, Z. A. Zhu, Xiaoyu Zhou, L. J. Wu, Y. J. Mo, C. P. Shen, S. Spataro, X. L. Li, G. Mezzadri, Z. A. Liu, V. Prasad, Shulei Zhang, F. Y. Li, O. Bakina, W. C. Yan, Xiang-Gan Liu, H. S. Chen, Alperen Yuncu, P. W. Luo, Li Zhou, Q. P. Ji, I. R. Boyko, S. Qian, Q. An, Jialun Ping, Liqing Xu, X. Y. Shen, Lei Li, H. M. Liu, Y. Ban, P. Weidenkaff, P. L. Wang, S. P. Wen, H. L. Dai, M. Bertani, J. F. Hu, K. Zhang, Huanhuan Liu, X. Y. Zhang, X. L. Wang, X. S. Qin, X. R. Zhou, X. L. Gao, Meng Wang, Cheng Li, G. F. Cao, Y. H. Zheng, Cong-Feng Qiao, L. Yang, Muhammad Irshad, J. H. Zou, G. Felici, P. X. Shen, Z. L. Dou, S. J. Zhao, Z. Wu, J. B. Liu, Zhang Li, X. H. Mo, L. S. Wang, L. M. Gu, M. N. Achasov, X. N. Ma, T. Y. Qi, Ke Wang, S. S. Sun, Y. J. Sun, Yifan Yang, N. Yu. Muchnoi, X. S. Kang, L. P. Zhou, Magnus Wolke, Y. P. Lu, A. Q. Guo, C. W. Wang, Y. F. Liang, M. Himmelreich, Y. H. Zhang, D. P. Jin, C. Dong, S. Sosio, Lingxuan Zhang, L. L. Wang, H. Cai, Zhiqing Zhang, W. M. Song, F. A. Harris, W. L. Chang, S. L. Olsen, H. J. Li, V. Rodin, X. P. Qin, Jacek Biernat, Y. M. Ma, Q. J. Xu, Z. P. Mao, Y. X. Xia, X. H. Li, R. E. Mitchell, I. B. Nikolaev, Q. L. Xiu, Xiao-Rui Lyu, Joachim Pettersson, J. H. Yin, Z. P. Zhang, H. Leithoff, R. Poling, Z. Y. Wang, Teresa Lenz, J. C. Chen, Xuanhong Lou, F. H. Heinsius, Xingchao Dai, Fenfen An, Viktor Thorén, B. L. Wang, Y. T. Tan, Nasser Kalantar-Nayestanaki, M. Shao, Y. T. Gu, Fang Liu, Q. Q. Song, X. P. Xu, X. B. Ji, U. Wiedner, I. Denysenko, Z. H. Qin, B. Wang, W. Gradl, Zongyuan Wang, W. Imoehl, M. Fritsch, C. Morales Morales, X. H. Liu, X. Tang, N. Qin, P. Patteri, Yue Pan, T. C. Zhao, Y. P. Guo, X. F. Wang, J. Fang, B. Y. Zhang, J. P. Dai, M. Albrecht, M. Rolo, R. Kappert, Serkant Ali Cetin, Zhiqing Liu, A. Sarantsev, Matthew Glenn Kurth, D. H. Wei, P. R. Li, M. Kavatsyuk, J. S. Lange, Y. G. Gao, Q. M. Ma, J. Min, J. Q. Zhang, L. Koch, A. Mustafa, F. Cossio, I. Uman, A. Khoukaz, K. J. Zhu, G. Wilkinson, Q. Ouyang, T. Johansson, J. F. Chang, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, W. S. Cheng, Yao Zhang, G. Li, Ch. Rosner, Bibo Ke, H. B. Liu, X. Q. Hao, W. D. Li, S. Nakhoul, R. Baldini Ferroli, W. B. Yan, B. T. Tsednee, Y. F. Wang, Z. G. Wang, S. S. Fang, H. Y. Zhang, Y. Yuan, Y. S. Zhu, J. Bloms, O. B. Kolcu, Yunlong Zhang, C. D. Fu, D. Bettoni, S. Pacetti, B. Kopf, Krisztian Peters, S. Malde, P. Larin, M. Z. Wang, X. Cai, G. F. Chen, J. Y. Zhang, Y. B. Liu, G. F. Xu, Z. J. Xiao, N. Huesken, K. L. He, L. Lavezzi, S. W. Han, C. Q. Feng, J. L. Zhang, Yu Zhang, H. Liang, Z. Y. Deng, Q. Liu, H. L. Jiang, Jianping Zheng, Tristan Weber, Ke Li, S. Jin, X. N. Li, H. W. Wen, B. X. Zhang, S. X. Du, K. Y. Liu, Y. K. Heng, Haiping Peng, M. Destefanis, L. L. Ma, L. Gong, R. Kliemt, A. Mangoni, A. Guskov, G. Y. Tang, Jimin Zhao, L. G. Xia, A. Amoroso, P. L. Li, Jie Yu, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, Y. Fu, F. H. Liu, Nicolas Berger, A. Dbeyssi, T. J. Min, J. W. Zhang, G. Cibinetto, C. F. Redmer, F. Feldbauer, Angelo Rivetti, Y. H. Yan, X. Y. Song, J. W. Zhao, Ke Liu, J. J. Xu, Feng Liu, Y. C. Zhu, Z. Q. Yang, J. Libby, J. S. Huang, M. Ablikim, X. Y. Jiang, Yaquan Fang, M. Greco, Shou-hua Zhu, T. Held, C. X. Liu, K. Schoenning, Q. Y. Li, B. S. Zou, Z. X. Meng, X. A. Xiong, A. A. Zafar, K. H. Rashid, I. Balossino Balossino, Y. T. Liang, S. J. Chen, L. H. Wu, Jun-Yi Zhang, M. Savrie, Yi Jin, Zujian Wang, J. W. Li, R. M. Wang, Y. J. Xiao, J. F. Sun, C. Sowa, Y. B. Zhao, W. Shan, S. Marcello, J. Dong, Y. Zeng, Y. J. Lin, Zhe Sun, S. Lusso, S. Nisar, C. J. Tang, Y. Hu, J. D. Lu, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, J. J. Song, L. Sun, X. T. Huang, G. Rong, M. M. Ma, M. Kuemmel, S. Ahmed, Y. X. Yang, M. Kuessner, Q. Zhao, Y. Z. Sun, X. F. Cui, I. K. Keshk, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, C. X. Lin, Z. Jiao, D. H. Zhang, Alexander Leon Gilman, M. Rump, Gang Zhao, G. A. Chelkov, G. S. Huang, W. J. Zhu, Y. H. Xie, X. D. Shi, Dan Wang, S. Gu, J. Y. Liu, M. Maggiora, Ling Zhao, Lei Zhao, S. L. Yang, Z. L. Hou, G. R. Liao, C. Z. Yuan, N. Cao, Q. Gao, Y. N. Gao, Y. Zhang, Feng Yan, P. Kiese, Yuan Hou, R. A. Briere, J. Z. Fan, A. Calcaterra, Z. G. Zhao, L. Z. Liao, X. S. Jiang, Yu Bai, H. H. Zhang, Z. J. Sun, S. Maldaner, R. Farinelli, R. X. Yang, H. H. Wang, Wei Xu, H. B. Li, C. L. Luo, A. Pitka, Q. Zhou, P. Adlarson, C. C. Zhang, B. Zhong, L. B. Guo, H. L. Ma, D. M. Li, M.G. Alekseev, Z. Gao, A. N. Zhu, S. L. Niu, Tao Zhang, H. Muramatsu, M. Pelizaeus, Y. F. Long, Xu Shan, J. C. Li, J. Zhuang, M. X. Luo, D. V. Dedovich, Xu Zhou, Yi Zhang, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, T. Hussain, X. Y. Ma, W. X. Gong, C. H. Li, X. H. Sun, Xiaozhong Huang, Andrzej Kupsc, and M. L. Chen

Subjects
Physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Pi, Analytical chemistry, Intermediate state, Born approximation, 010306 general physics, 01 natural sciences, X(3872), Bar (unit)
Abstract

Several intermediate states of the reaction channels e(+)e(-) -> pi(+)pi(-) D-0(D) over bar (0) and e(+)e(-) -> pi(+)pi-D+D- are studied using the data samples collected with the BESIII detec ...

Published
2019
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41. Measurements of the branching fractions of ηc→K+K−π0 , KS0K±π∓ , 2(π+π−π0) , and pp¯

Author

Bibo Ke, W. B. Yan, I. B. Nikolaev, J. H. Yin, S. Pacetti, S. B. Liu, M. Shao, Y. T. Gu, Y. Nefedov, Xiao-Rui Lyu, J. Q. Zhang, F. De Mori, Ke Li, M. Richter, R. Kliemt, Q. Q. Song, X D Shi, A. Mangoni, A. Guskov, Y. J. Mao, Tao Luo, B. X. Yu, Z. Ning, Shulei Zhang, F. Y. Li, H. S. Chen, Alperen Yuncu, H. L. Dai, J. Libby, Jie Yu, H. X. Yang, I. Garzia, Yaquan Fang, M. Greco, Y. P. Guo, Shou-hua Zhu, Serkant Ali Cetin, A. Sarantsev, Ke Wang, D. H. Wei, P. R. Li, J. S. Lange, H. J. Lu, J. G. Lu, Fang Liu, F. Li, Magnus Wolke, X. K. Zhou, X. F. Wang, T. J. Min, K. J. Zhu, B. Garillon, Huihui Liu, R. Poling, F. H. Heinsius, Fenfen An, J. Bloms, F. E. Maas, F. C. Ma, B. L. Wang, T. C. Zhao, U. Wiedner, I. Denysenko, Q. M. Ma, A. Mustafa, G. Cibinetto, K. Schoenning, Q. Y. Li, T. Hu, L. Koch, A. Khoukaz, R. Baldini Ferroli, Krisztian Peters, M. Z. Wang, B. S. Zou, D. Y. Liu, J. G. Messchendorp, J. B. Jiao, Zongyuan Wang, X. N. Li, B. Y. Zhang, Haiping Peng, Y. F. Liang, D. P. Jin, M. Albrecht, X. L. Li, X. H. Mo, L. S. Wang, Y. Yuan, Y. S. Zhu, W. S. Cheng, O. Bakina, Yu Zhang, M. H. Ye, Yao Zhang, G. Li, G. Y. Tang, X. L. Ji, W. D. Li, J. F. Qiu, M. Papenbrock, B. T. Tsednee, W. G. Li, A. G. Denig, Q. Liu, Tristan Weber, M. Y. Dong, L. L. Wang, H. Cai, L. Fava, Y. K. Sun, Xiaoyu Zhou, L. L. Ma, Q. Ouyang, C. D. Fu, X. N. Ma, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, C. Q. Feng, S. S. Fang, L. Gong, L. G. Xia, Z. Y. Deng, Jie Zhao, S. Spataro, A. Amoroso, M. Ripka, D. X. Lin, F. Nerling, Alexey Zhemchugov, H. M. Hu, H. Liang, Y. Fu, P. X. Shen, Z. Y. Zhang, Y. H. Xie, J. H. Zou, N. Qin, Z. A. Liu, Y. B. Liu, Q. P. Ji, A. Dbeyssi, Y. H. Yan, Z. Wu, Lei Li, H. M. Liu, S. S. Sun, F. H. Liu, J. W. Zhao, Nicolas Berger, Y. Ding, V. Prasad, B. J. Liu, M. Maggiora, Ling Zhao, P. L. Wang, J. F. Hu, Yunlong Zhang, S. J. Zhao, H. L. Liu, Yang Zhang, Y. G. Xie, J. W. Zhang, D. Bettoni, X. L. Luo, Angelo Rivetti, B. Wang, Lei Zhao, Y. C. Zhu, P. W. Luo, S. Qian, Q. An, Jialun Ping, G. F. Cao, L. Y. Dong, Zhiqing Zhang, Xiaozhong Huang, J. L. Zhang, K. Zhang, Z. L. Hou, R. E. Mitchell, M. Fritsch, X. Y. Zhang, Z. L. Dou, N. Hsken, K. Begzsuren, X. L. Wang, Q. J. Xu, Y. Ban, P. Weidenkaff, A. Q. Guo, C. W. Wang, W. P. Wang, F. Bianchi, H. L. Jiang, J. C. Chen, Xuanhong Lou, M. Kavatsyuk, J. B. Liu, Jianping Zheng, Ke Liu, Q. A. Malik, Y. J. Sun, Yifan Yang, G. Mezzadri, Nasser Kalantar-Nayestanaki, Meng Wang, Muhammad Irshad, X. Q. Hao, Zhiqing Liu, W. C. Yan, T. Held, W. Kühn, Z. Y. You, S. P. Wen, X. P. Xu, X. B. Ji, Y. P. Lu, S. Nakhoul, C. Morales Morales, C. Z. Yuan, Yue Pan, X. S. Qin, X. R. Zhou, Z. G. Wang, Andrzej Kupsc, Cheng Li, P. Patteri, L. M. Gu, M. N. Achasov, L. P. Zhou, T. Johansson, S. X. Du, J. F. Chang, K. Y. Liu, Z. A. Zhu, Z. H. Qin, B. X. Zhang, H. Y. Zhang, F. A. Harris, W. L. Chang, Huanhuan Liu, G. Felici, Z. P. Zhang, Y. M. Ma, H. Leithoff, Z. P. Mao, Y. F. Wang, P. Larin, T. Khan, O. B. Kolcu, X. Cai, L. Lavezzi, G. F. Chen, M. Destefanis, Z. Q. Yang, J. Fang, J. Y. Zhang, A. Calcaterra, Z. G. Zhao, M. L. Chen, C. P. Shen, M. Kuessner, L. J. Wu, F. Feldbauer, H. J. Li, X. Tang, L. Z. Liao, Ch. Rosner, Z. L. Huang, Feng Liu, F. F. Sui, Y. J. Mo, M. H. Gu, X. H. Li, M. Ablikim, Y. K. Heng, R. Kiuchi, X. Y. Jiang, M. Rolo, Q. L. Xiu, H. Y. Sheng, G. A. Chelkov, I. R. Boyko, J. S. Huang, C. X. Yu, F. Cossio, Liqing Xu, X. Y. Shen, T. Y. Qi, Yu Bai, H. H. Zhang, I. Uman, B. Zheng, R. G. Ping, X. L. Gao, Z. J. Xiao, C. X. Liu, C. Dong, Z. J. Sun, Y. X. Xia, S. Sosio, Lingxuan Zhang, Joachim Pettersson, S. Maldaner, Y. G. Gao, J. C. Li, W. Imoehl, X. H. Liu, J. Zhuang, G. F. Xu, J. P. Dai, S. Jin, M. X. Luo, D. V. Dedovich, Xu Zhou, X. Y. Song, Y. H. Zheng, Cong-Feng Qiao, K. Goetzen, N. Yu. Muchnoi, X. S. Kang, H. B. Li, Y. H. Zhang, S. L. Olsen, M. Qi, Z. Y. Wang, C. L. Luo, Q. Zhou, H. J. Yang, C. C. Zhang, B. Zhong, L. B. Guo, M.G. Alekseev, A. N. Zhu, Tao Zhang, M. Bertani, L. Yang, Xu Shan, Y. T. Tan, W. Gradl, J. Min, H. B. Liu, J. Y. Liu, B. Kopf, K. L. He, Q. Gao, Y. N. Gao, Y. Zhang, Feng Yan, J. Z. Fan, S. W. Han, S. Ahmed, Y. X. Yang, Q. Zhao, Jimin Zhao, Y. Z. Sun, P. L. Li, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, C. F. Redmer, R. Farinelli, Jun-Yi Zhang, H. L. Ma, D. M. Li, H. Muramatsu, M. Pelizaeus, D. W. Bennett, Zujian Wang, M. M. Ma, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, D. H. Zhang, C. Sowa, Y. B. Zhao, W. Shan, J. Dong, S. Nisar, C. J. Tang, Y. Hu, P. Kiese, J. F. Sun, Z. X. Meng, S. Marcello, Y. Zeng, X. A. Xiong, Zhe Sun, S. Lusso, A. A. Zafar, R. A. Briere, Y. B. Chen, K. H. Rashid, Xiaofeng Zhu, J. Z. Zhang, J. J. Song, Y. T. Liang, L. Sun, S. J. Chen, J. D. Lu, X. S. Jiang, S. L. Yang, X. T. Huang, G. Rong, G. R. Liao, L. H. Wu, M. Savrie, Yi Jin, J. W. Li, R. M. Wang, Y. J. Xiao, M. Kuemmel, Matthew Glenn Kurth, G. S. Huang, X. D. Shi, R. X. Yang, H. H. Wang, Wei Xu, Dan Wang, A. Pitka, Z. Gao, S. L. Niu, X. Q. Li, Y. F. Long, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, T. Hussain, X. Y. Ma, W. X. Gong, C. H. Li, and X. H. Sun

Subjects
Physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Pi, Analytical chemistry, Multiplicity (chemistry), 010306 general physics, Branching (polymer chemistry), 01 natural sciences, Bar (unit)
Abstract

Using data samples collected with the BESIII detector at center-of-mass energies s=4.23, 4.26, 4.36, and 4.42 GeV, we measure the branching fractions of ηc→K+K-π0, KS0K±π∓, 2(π+π-π0), and pp¯, via the process e+e-→π+π-hc, hc→γηc. The corresponding results are (1.15±0.12±0.10)%, (2.60±0.21±0.20)%, (15.2±1.8±1.7)%, and (0.120±0.026±0.015)%, respectively. Here the first uncertainties are statistical, and the second ones systematic. Additionally, the charged track multiplicity of ηc decays is measured for the first time.

Published
2019
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42. Observation and study of the decay J/ψ→ϕηη′

Author

X. L. Ji, Jun-Yi Zhang, Huanhuan Liu, Y. F. Wang, Z. Y. Zhang, G. Felici, D. Y. Liu, J. B. Jiao, T. Hussain, X. Y. Ma, Y. G. Xie, W. X. Gong, D. W. Bennett, Zujian Wang, Bibo Ke, W. B. Yan, F. De Mori, Z. L. Dou, X. Y. Zhou, T. Y. Qi, H. J. Li, G. R. Liao, C. H. Li, X. H. Sun, Y. Ding, M. Kuessner, Q. L. Xiu, J. Y. Liu, Q. Gao, Y. N. Gao, B. J. Liu, Y. Zhang, S. Pacetti, Feng Yan, R. Farinelli, Ke Li, X. K. Chu, Y. X. Xia, X. K. Zhou, M. H. Ye, X. F. Wang, Q. M. Ma, A. Mustafa, H. L. Ma, D. M. Li, H. Muramatsu, J. F. Sun, S. Marcello, Y. Zeng, Zhe Sun, S. Lusso, W. Kühn, Z. Y. You, Z. A. Zhu, M. Y. Dong, M. Pelizaeus, S. Ahmed, Y. X. Yang, Kang Li, H. J. Lu, J. G. Lu, Q. Zhao, Y. Z. Sun, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, Gang Zhao, H. R. Qi, G. A. Chelkov, Xiao-Rui Lyu, M. Richter, Z. Ning, X. Y. Niu, Y. Yuan, Y. S. Zhu, Z. Gao, S. L. Niu, X. Q. Li, Y. F. Long, Zongyuan Wang, L. Y. Dong, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, J. H. Zou, S. S. Sun, Y. P. Guo, F. E. Maas, T. Hu, F. Li, X. Tang, J. J. Song, L. Sun, Serkant Ali Cetin, Yu Zhang, M. M. Ma, S. B. Liu, F. C. Ma, C. P. Shen, L. J. Wu, X. L. Li, O. Bakina, Y. H. Xie, Y. G. Gao, J. Pellegrino, X. Q. Hao, R. E. Mitchell, Yi Zhang, Y. Nefedov, M. Rolo, K. Y. Liu, W. S. Cheng, Yao Zhang, G. Li, M. Bertani, S. Qian, Q. An, Jialun Ping, Q. Liu, Tristan Weber, M. G. Zhao, Y. H. Yang, M. Kuemmel, Matthew Glenn Kurth, Y. J. Mo, S. Q. Qu, Q. Ouyang, Lingxuan Zhang, Z. B. Li, Fang Liu, K. Zhang, X. Y. Zhang, P. X. Shen, M. Maggiora, Ling Zhao, Z. Wu, S. S. Fang, W. Ikegami Andersson, Zhiqing Liu, Z. Haddadi, P. Larin, U. Wiedner, I. Denysenko, L. L. Ma, R. P. Guo, J. Zhu, L. Gong, J. F. Qiu, J. B. Liu, L. Yang, M. Papenbrock, P. Kiese, L. Fava, I. Tapan, Y. B. Liu, Lei Zhao, Z. L. Hou, T. Johansson, J. F. Chang, Zhiqing Zhang, X. H. Mo, B. Y. Zhang, P. L. Wang, F. Nerling, R. A. Briere, L. G. Xia, A. Amoroso, Y. H. Yan, C. D. Fu, C. Q. Feng, X. R. Chen, L. S. Wang, G. S. Huang, Z. A. Liu, Y. J. Sun, Yifan Yang, E. Boger, V. Prasad, X. L. Luo, Q. P. Ji, F. Cossio, I. R. Boyko, K. J. Zhu, Y. P. Lu, Yang Zhang, J. Chai, J. W. Zhao, O. B. Kolcu, X. S. Jiang, L. L. Wang, X. Cai, L. Lavezzi, K. Begzsuren, Dan Wang, A. Dbeyssi, G. Y. Tang, H. Cai, Y. C. Zhu, W. P. Wang, Liqing Xu, X. Y. Shen, S. J. Zhao, F. Bianchi, Y. Ban, P. Weidenkaff, I. B. Nikolaev, C. Z. Yuan, Y. H. Zheng, R. X. Yang, Cong-Feng Qiao, S. P. Wen, Z. Y. Deng, M. Ripka, J. H. Yin, A. Pitka, M. Kornicer, Angelo Rivetti, Jie Zhao, D. X. Lin, X. S. Qin, Alexey Zhemchugov, H. M. Hu, M. Shao, Y. T. Gu, F. H. Liu, G. X. Sun, J. V. Bennett, Li Yan, A. Julin, O. Cakir, Meng Wang, Muhammad Irshad, Yunlong Zhang, Z. Jiao, D. H. Zhang, H. L. Liu, T. Held, D. Bettoni, Nicolas Berger, N. Yu. Muchnoi, X. S. Kang, J. W. Zhang, E. Fioravanti, Y. H. Zhang, X. R. Zhou, Cheng Li, J. L. Zhang, F. A. Harris, Q. J. Xu, J. Q. Zhang, Y. T. Tan, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, C. Sowa, Y. B. Zhao, Jianping Zheng, J. Z. Bai, S. L. Olsen, S. Zhu, W. Shan, Z. P. Zhang, H. Leithoff, J. Dong, W. Gradl, J. C. Chen, T. Khan, M. H. Gu, R. Kiuchi, Xuanhong Lou, Z. Y. Wang, M. Albrecht, W. D. Li, Nasser Kalantar-Nayestanaki, D. Y. Wang, B. T. Tsednee, M. Qi, S. X. Du, C. Morales Morales, S. Nisar, X. H. Liu, C. J. Tang, Y. Hu, H. Y. Sheng, C. X. Yu, J. P. Dai, H. J. Yang, Yue Pan, M. Destefanis, X. L. Gao, B. Zheng, R. G. Ping, F. Feldbauer, D. Xiao, Z. L. Huang, Z. G. Wang, X. P. Xu, X. B. Ji, M. Tiemens, H. Y. Zhang, Feng Liu, M. Ablikim, X. Y. Jiang, H. Liang, C. Dong, S. Sosio, G. F. Chen, P. Patteri, J. Y. Zhang, X. N. Ma, Joachim Pettersson, A. Q. Guo, Z. Y. Peng, J. Min, R. Kliemt, A. Mangoni, A. Guskov, Jie Yu, H. B. Liu, Y. K. Heng, W. M. Song, B. Kopf, B. Wang, K. L. He, S. W. Han, M. Fritsch, M. Kavatsyuk, Jimin Zhao, Z. H. Qin, P. L. Li, X D Shi, C. F. Redmer, G. Cibinetto, Y. J. Mao, H. X. Yang, I. Garzia, B. X. Zhang, B. Garillon, Huihui Liu, Magnus Wolke, Y. F. Liang, J. G. Messchendorp, L. Koch, A. Khoukaz, Qiunan Xu, D. P. Jin, W. G. Li, A. G. Denig, Y. K. Sun, Xiaoyu Zhou, S. Spataro, H. M. Liu, Dayong Wang, N. Qin, J. F. Hu, G. F. Cao, I. Uman, R. Baldini Ferroli, Z. J. Xiao, Ke Liu, P. L. Chen, Xiaozhong Huang, X. L. Wang, Andrzej Kupsc, Krisztian Peters, M. L. Chen, J. Libby, Yaquan Fang, M. Greco, M. Z. Wang, Shou-hua Zhu, X. N. Li, Haiping Peng, K. Schoenning, Q. Y. Li, B. S. Zou, Ke Wang, Q. A. Malik, G. Mezzadri, W. C. Yan, X. Q. He, M. N. Achasov, L. P. Zhou, R. Poling, P. F. Duan, F. H. Heinsius, Y. M. Ma, Z. P. Mao, Fenfen An, J. Fang, Ch. Rosner, B. L. Wang, T. C. Zhao, Tao Luo, B. X. Yu, F. Y. Li, H. S. Chen, Alperen Yuncu, Jin Li, H. L. Dai, G. F. Xu, S. Jin, X. Y. Song, K. Goetzen, L. D. Liu, J. J. Xu, Z. Q. Yang, H. B. Li, C. L. Luo, J. S. Huang, C. X. Liu, Q. Zhou, C. C. Zhang, B. Zhong, Lei Li, M.G. Alekseev, A. N. Zhu, Tao Zhang, T. Ma, Xu Shan, J. C. Li, J. Zhuang, M. X. Luo, D. V. Dedovich, Xu Zhou, A. Calcaterra, Z. G. Zhao, S. Fegan, L. Z. Liao, Yu Bai, H. H. Zhang, Z. J. Sun, S. Maldaner, L. H. Wu, M. Savrie, Yi Jin, J. W. Li, Y. J. Xiao, Z. X. Meng, X. A. Xiong, A. A. Zafar, K. H. Rashid, Y. T. Liang, S. J. Chen, K. J. Li, X. T. Huang, and G. Rong

Subjects
Nuclear physics, Physics, Angular distribution, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Detector, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Parity (mathematics), 01 natural sciences
Abstract

We report the observation and study of the decay J/psi -> phi eta eta' phi eta eta' using 1.3 x 10(9) J/psi events collected with the BESIII detector. Its branching fraction, including all possi ...

Published
2019
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43. Study of the decays Ds+→KS0K+ and KL0K+

Author

Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, F. H. Liu, Nicolas Berger, J. W. Zhang, L. J. Wu, Y. J. Mo, Bibo Ke, W. B. Yan, M. Kuemmel, Matthew Glenn Kurth, X. Q. Hao, P. L. Wang, S. Nakhoul, Meng Wang, Xiang-Gan Liu, X. L. Ji, P. Larin, Q. P. Ji, Muhammad Irshad, M. Kuessner, S. Pacetti, X. N. Ma, T. Y. Qi, X. F. Cui, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, Y. H. Zheng, M. Himmelreich, G. Wilkinson, W. S. Cheng, Yao Zhang, I. R. Boyko, Y. X. Xia, T. Yu, X. K. Zhou, G. Li, N. Huesken, H. J. Lu, J. G. Lu, F. F. Sui, M. H. Gu, R. Kiuchi, Ke Li, H. Y. Sheng, F. A. Harris, W. L. Chang, Cong-Feng Qiao, N. Yu. Muchnoi, Liqing Xu, X. Y. Shen, Y. Ding, L. H. Wu, M. Fritsch, J. Libby, C. D. Fu, C. Q. Feng, Z. Y. Deng, H. Leithoff, X. S. Kang, Z. Y. Zhang, S. Ahmed, Y. X. Yang, Y. G. Gao, R. Kappert, F. E. Maas, C. X. Yu, T. Hu, E. M. Gersabeck, S. Qian, W. J. Zhu, G. F. Xu, X. L. Luo, I. Balossino, Y. H. Zhang, F. Li, F. C. Ma, B. J. Liu, Z. G. Wang, T. Y. Xing, D. Y. Chen, Fang Liu, W. Kühn, S. L. Olsen, Yi Jin, J. W. Li, H. Y. Zhang, M. Kavatsyuk, Q. An, Jialun Ping, K. Zhang, X. Y. Zhang, X. D. Shi, R. M. Wang, Dan Wang, Xingguo Li, G. A. Chelkov, S. Jin, O. Bakina, S. Gu, U. Wiedner, I. Denysenko, Z. Y. Wang, Z. Y. You, Z. A. Zhu, T. Liu, J. F. Qiu, M. Papenbrock, B. Zheng, R. G. Ping, Y. J. Xiao, Y. G. Xie, X. L. Wang, K. Begzsuren, Li Zhou, W. P. Wang, J. B. Liu, R. Kliemt, F. Bianchi, L. Fava, Y. J. Sun, Yifan Yang, A. Mangoni, A. Guskov, Jie Yu, G. F. Chen, P. Kiese, Yuan Hou, P. X. Shen, Z. Wu, Q. Zhao, Y. Z. Sun, J. F. Sun, Y. H. Xie, F. Nerling, M. Maggiora, Ling Zhao, C. P. Shen, B. Y. Zhang, J. Y. Zhang, X. H. Mo, L. S. Wang, Z. L. Dou, Y. P. Lu, M. H. Ye, B. X. Zhang, T. J. Min, K. J. Zhu, G. Cibinetto, D. Y. Liu, L. Y. Liu, Zhiqing Zhang, S. Marcello, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, Y. Zeng, Y. J. Lin, Yang Zhang, Zhe Sun, S. Lusso, H. W. Wen, W. Imoehl, M. Y. Dong, Lei Zhao, R. A. Briere, Z. L. Hou, Xiao-Rui Lyu, Y. Schelhaas, P. W. Luo, G. S. Huang, Zhang Li, L. L. Wang, H. Cai, X. H. Liu, Zongyuan Wang, Y. K. Heng, J. D. Lu, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Jacek Biernat, Lingxuan Zhang, J. H. Zou, Q. Q. Song, V. Rodin, C. Z. Yuan, N. Cao, S. J. Zhao, X. P. Xu, X. B. Ji, J. P. Dai, M. Albrecht, J. J. Song, X. S. Jiang, R. Farinelli, L. Sun, X. T. Huang, S. S. Sun, G. Rong, X. P. Qin, P. Patteri, W. D. Li, Z. X. Meng, X. A. Xiong, Y. P. Guo, Q. Ouyang, H. L. Ma, L. Y. Dong, T. Lenz, A. A. Zafar, D. M. Li, H. Muramatsu, Q. J. Xu, S. S. Fang, J. Bloms, R. E. Mitchell, B. T. Tsednee, Serkant Ali Cetin, J. C. Chen, Xuanhong Lou, Z. A. Liu, V. Prasad, J. Q. Zhang, Y. B. Liu, S. L. Yang, Viktor Thorén, M. Pelizaeus, Nasser Kalantar-Nayestanaki, K. H. Rashid, R. X. Yang, Wei Xu, Huanhuan Liu, Y. Fu, A. Pitka, P. Adlarson, C. Morales Morales, G. Felici, G. R. Liao, J. B. Jiao, I. B. Nikolaev, Yue Pan, B. Q. Wang, Y. Ban, P. Weidenkaff, S. P. Wen, J. H. Yin, M. Shao, Y. T. Gu, Y. H. Yan, J. Y. Liu, Y. T. Liang, X. S. Qin, X. R. Zhou, J. W. Zhao, H. J. Li, S. J. Chen, X. H. Li, Q. L. Xiu, Y. C. Zhu, Z. Gao, Cheng Li, F. Feldbauer, Feng Liu, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Xingchao Dai, M. Ablikim, X. Y. Jiang, T. Held, S. L. Niu, Q. Gao, Y. F. Long, Y. N. Gao, K. Ravindran, Mario Greco, Y. Zhang, Feng Yan, J. Z. Fan, M. Richter, Z. Ning, S. Y. Xiao, Yi Zhang, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, Y. F. Wang, Zhiqing Liu, T. Johansson, J. F. Chang, T. Hussain, O. B. Kolcu, X. Cai, L. Lavezzi, X. Y. Ma, W. X. Gong, C. Sowa, Y. B. Zhao, W. Shan, J. Dong, C. H. Li, X. H. Sun, Q. Liu, Tristan Weber, S. Nisar, C. J. Tang, Y. Hu, L. L. Ma, L. Gong, Xujin Yuan, L. G. Xia, A. Amoroso, S. B. Liu, Y. Nefedov, A. Dbeyssi, M. M. Ma, Angelo Rivetti, F. De Mori, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, D. H. Zhang, Jun-Yi Zhang, X. F. Wang, Q. M. Ma, A. Mustafa, Z. P. Zhang, Y. Yuan, Y. S. Zhu, Zujian Wang, Yu Zhang, X. Tang, M. Rolo, F. Cossio, X. L. Gao, C. Dong, S. Sosio, J. Min, H. B. Liu, B. Kopf, K. L. He, Joachim Pettersson, S. W. Han, M. Z. Wang, Jimin Zhao, P. L. Li, C. F. Redmer, M. Bertani, L. Yang, Y. T. Tan, Yunlong Zhang, W. Gradl, M. Qi, D. Bettoni, H. J. Yang, J. L. Zhang, Yaquan Fang, Shou-hua Zhu, H. L. Jiang, K. Schoenning, Q. Y. Li, B. S. Zou, Jianping Zheng, H. Liang, S. X. Du, K. Y. Liu, Ke Liu, Q. A. Malik, G. Mezzadri, W. C. Yan, Tao Luo, L. M. Gu, M. N. Achasov, L. P. Zhou, M. Destefanis, Y. M. Ma, Z. P. Mao, J. Fang, B. X. Yu, Xiaozhong Huang, Ch. Rosner, Andrzej Kupsc, M. L. Chen, Shulei Zhang, F. Y. Li, H. S. Chen, Alperen Yuncu, H. L. Dai, Magnus Wolke, Y. F. Liang, D. P. Jin, N. Qin, I. Uman, L. Koch, A. Khoukaz, Z. J. Xiao, W. G. Li, A. G. Denig, Y. K. Sun, R. Baldini Ferroli, Xiaoyu Zhou, S. Spataro, Lei Li, H. M. Liu, J. F. Hu, Krisztian Peters, G. F. Cao, X. Y. Song, S. Malde, A. Q. Guo, C. W. Wang, J. J. Xu, Z. Q. Yang, X. N. Li, J. S. Huang, Z. H. Qin, Haiping Peng, C. X. Liu, Ke Wang, X D Shi, Y. J. Mao, H. X. Yang, I. Garzia, R. Poling, F. H. Heinsius, Fenfen An, B. L. Wang, B. Garillon, T. C. Zhao, Huihui Liu, J. G. Messchendorp, K. Goetzen, A. Calcaterra, Z. G. Zhao, L. Z. Liao, Yu Bai, H. H. Zhang, Z. J. Sun, S. Maldaner, H. B. Li, C. L. Luo, Q. Zhou, C. C. Zhang, B. Zhong, L. B. Guo, M.G. Alekseev, A. N. Zhu, Tao Zhang, Xu Shan, J. C. Li, J. Zhuang, M. X. Luo, D. V. Dedovich, Xu Zhou, and G. Y. Tang

Subjects
Physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Analytical chemistry, CP violation, 010306 general physics, 01 natural sciences
Abstract

Using an e+e- annihilation data sample corresponding to an integrated luminosity of 3.19 fb-1 and collected at a center-of-mass energy s=4.178 GeV with the BESIII detector, we measure the absolute branching fractions B(Ds+→KS0K+)=(1.425±0.038stat.±0.031syst.)% and B(Ds+→KL0K+)=(1.485±0.039stat.±0.046syst.)%. The branching fraction of Ds+→KS0K+ is compatible with the world average and that of Ds+→KL0K+ is measured for the first time. We present the first measurement of the KS0-KL0 asymmetry in the decays Ds+→KS,L0K+, and R(Ds+→KS,L0K+)=B(Ds+→KS0K+)-B(Ds+→KL0K+)B(Ds+→KS0K+)+B(Ds+→KL0K+)=(-2.1±1.9stat.±1.6syst.)%. In addition, we measure the direct CP asymmetries ACP(Ds±→KS0K±)=(0.6±2.8stat.±0.6syst.)% and ACP(Ds±→KL0K±)=(-1.1±2.6stat.±0.6syst.)%.

Published
2019
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44. Cross section measurements of e+e−→ωχc0 from s=4.178 to 4.278 GeV

Author

B. X. Yu, F. De Mori, Y. H. Zheng, Cong-Feng Qiao, S. Qian, Q. An, Jialun Ping, N. Yu. Muchnoi, K. Zhang, X. S. Kang, Shulei Zhang, X. Y. Zhang, X. L. Wang, Y. H. Zhang, J. B. Liu, F. Y. Li, H. S. Chen, Alperen Yuncu, Zongyuan Wang, F. Li, S. L. Olsen, F. C. Ma, Y. J. Sun, Yifan Yang, Z. Q. Yang, Y. P. Lu, Z. Y. Wang, Teresa Lenz, H. L. Dai, X. F. Wang, Xujin Yuan, S. B. Liu, Y. Nefedov, Q. M. Ma, J. S. Huang, C. X. Liu, Z. X. Meng, S. L. Yang, G. Y. Tang, A. Calcaterra, Z. G. Zhao, Q. Ouyang, X. A. Xiong, S. S. Fang, A. Mustafa, L. Z. Liao, G. R. Liao, Xiao-Rui Lyu, A. A. Zafar, Jie Zhao, D. X. Lin, X. N. Ma, S. Ahmed, Alexey Zhemchugov, H. M. Hu, T. Liu, J. F. Qiu, X. H. Mo, L. S. Wang, D. Y. Liu, J. B. Jiao, M. H. Ye, Y. B. Liu, Y. Yuan, Y. S. Zhu, Yu Bai, H. H. Zhang, Yu Zhang, Y. X. Yang, Ke Wang, M. Papenbrock, W. Imoehl, Z. Gao, X. H. Liu, S. L. Niu, Q. Liu, F. H. Liu, Nicolas Berger, K. H. Rashid, L. Fava, B. Wang, M. Albrecht, Z. J. Sun, L. L. Wang, F. Nerling, Tristan Weber, S. Maldaner, J. W. Zhang, M. Kuemmel, Matthew Glenn Kurth, C. Sowa, Y. B. Zhao, Huanhuan Liu, G. Felici, J. P. Dai, X. F. Cui, K. Goetzen, R. Poling, L. L. Ma, L. Gong, Y. T. Liang, F. H. Heinsius, Q. Zhao, Y. Z. Sun, Yang Zhang, M. Fritsch, M. Kavatsyuk, H. Cai, X. Q. Li, Jacek Biernat, I. B. Nikolaev, J. H. Yin, M. Shao, Y. T. Gu, W. Shan, M. Bertani, B. X. Zhang, J. C. Li, W. D. Li, L. G. Xia, A. Amoroso, A. Dbeyssi, B. T. Tsednee, J. Zhuang, M. X. Luo, S. J. Chen, M. Kuessner, J. Dong, G. S. Huang, W. J. Zhu, X. D. Shi, Dan Wang, Fenfen An, H. J. Li, R. Kappert, B. L. Wang, T. C. Zhao, I. K. Keshk, C. X. Lin, D. V. Dedovich, X. H. Li, Alexander Leon Gilman, S. Gu, Xu Zhou, Xiaozhong Huang, M. Richter, Q. L. Xiu, Y. F. Long, M. Rump, Gang Zhao, L. Yang, H. Liang, Q. P. Ji, J. Bloms, Angelo Rivetti, Xingchao Dai, E. M. Gersabeck, G. F. Xu, Y. Fu, L. Koch, A. Khoukaz, Z. Ning, S. Y. Xiao, Q. Q. Song, J. F. Sun, Andrzej Kupsc, G. A. Chelkov, S. Nisar, Fang Liu, J. Q. Zhang, S. Jin, X D Shi, A. Sarantsev, X. L. Luo, J. D. Lu, R. Baldini Ferroli, Y. H. Yan, D. H. Wei, P. R. Li, J. S. Lange, R. Farinelli, X. K. Zhou, P. L. Wang, S. Marcello, Y. Zeng, Y. J. Lin, C. J. Tang, Y. Hu, J. W. Zhao, Yi Zhang, Zhe Sun, S. Lusso, Y. J. Mao, H. X. Yang, Krisztian Peters, S. Malde, M. Z. Wang, M. L. Chen, I. Garzia, X. T. Huang, Meng Wang, Muhammad Irshad, K. Begzsuren, Y. C. Zhu, W. P. Wang, Y. H. Xie, F. Bianchi, U. Wiedner, Y. P. Guo, H. B. Li, H. L. Ma, H. J. Lu, J. G. Lu, X. L. Ji, G. Rong, Y. T. Tan, X. Y. Song, W. Gradl, Y. B. Chen, X. N. Li, D. M. Li, C. L. Luo, Xiaofeng Zhu, J. Z. Zhang, Q. Zhou, I. Denysenko, J. J. Song, L. Sun, H. Muramatsu, M. Maggiora, Ling Zhao, F. E. Maas, T. Hu, Haiping Peng, S. Q. Qu, Z. B. Li, Serkant Ali Cetin, M. M. Ma, F. A. Harris, W. L. Chang, M. Qi, C. C. Zhang, B. Zhong, L. B. Guo, Z. Y. Zhang, H. J. Yang, M. Pelizaeus, T. Held, Lei Li, M.G. Alekseev, X. L. Li, O. Bakina, L. Y. Liu, B. Garillon, Huihui Liu, Ke Liu, Z. P. Zhang, H. Leithoff, Lei Zhao, Z. L. Hou, Zhiqing Liu, W. Ikegami Andersson, L. H. Wu, A. N. Zhu, J. Y. Liu, Tao Zhang, L. Y. Dong, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, M. Savrie, Yi Jin, D. H. Zhang, T. Johansson, J. Libby, F. Feldbauer, P. X. Shen, Feng Liu, J. W. Li, Jun-Yi Zhang, Magnus Wolke, R. M. Wang, Y. J. Xiao, J. F. Chang, Xu Shan, Y. F. Liang, D. P. Jin, Z. Wu, J. G. Messchendorp, Yaquan Fang, M. Greco, Shou-hua Zhu, M. Ablikim, P. Kiese, X. Y. Jiang, Q. Gao, Y. N. Gao, Yuan Hou, Y. F. Wang, Zujian Wang, Y. G. Xie, O. B. Kolcu, Y. Zhang, Zhiqing Zhang, Li Zhou, Feng Yan, C. Z. Yuan, N. Cao, X. Cai, J. Z. Fan, L. Lavezzi, N. Qin, J. Min, H. B. Liu, R. A. Briere, Z. L. Dou, B. Y. Zhang, B. Kopf, A. Q. Guo, C. W. Wang, I. Uman, K. L. He, K. Schoenning, Q. Y. Li, B. S. Zou, S. W. Han, Jimin Zhao, P. L. Li, X. S. Jiang, Q. A. Malik, G. Mezzadri, W. C. Yan, C. F. Redmer, Z. J. Xiao, L. M. Gu, M. N. Achasov, L. P. Zhou, Y. M. Ma, Z. P. Mao, R. X. Yang, H. H. Wang, J. Fang, Wei Xu, A. Pitka, P. Adlarson, Ch. Rosner, T. Hussain, X. Y. Ma, W. X. Gong, C. H. Li, X. H. Sun, Z. H. Qin, W. G. Li, A. G. Denig, Y. K. Sun, Xiaoyu Zhou, S. Spataro, H. M. Liu, J. F. Hu, G. F. Cao, M. Y. Dong, J. H. Zou, S. S. Sun, R. E. Mitchell, Bibo Ke, W. B. Yan, S. Pacetti, N. Huesken, Ke Li, Z. G. Wang, H. Y. Zhang, X. Q. Hao, G. F. Chen, S. Nakhoul, J. Y. Zhang, P. Larin, H. W. Wen, T. Y. Qi, Y. X. Xia, R. Kliemt, Y. K. Heng, S. J. Zhao, B. J. Liu, Y. G. Gao, Q. J. Xu, A. Mangoni, J. C. Chen, Xuanhong Lou, Viktor Thorén, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, A. Guskov, I. Balossino, Jie Yu, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, T. J. Min, K. J. Zhu, G. Cibinetto, L. J. Wu, Y. J. Mo, Xiang-Gan Liu, I. R. Boyko, Liqing Xu, X. Y. Shen, G. Wilkinson, Y. Ding, T. Y. Xing, D. Y. Chen, W. Kühn, W. S. Cheng, Yao Zhang, Z. Y. You, Z. A. Zhu, G. Li, C. P. Shen, C. D. Fu, C. Q. Feng, Z. Y. Deng, P. W. Luo, Zhang Li, V. Rodin, X. P. Xu, X. B. Ji, P. Patteri, Z. A. Liu, V. Prasad, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, X. R. Zhou, Cheng Li, Lingxuan Zhang, X. P. Qin, F. F. Sui, M. H. Gu, R. Kiuchi, H. Y. Sheng, C. X. Yu, B. Zheng, R. G. Ping, X. L. Gao, C. Dong, S. Sosio, Joachim Pettersson, Yunlong Zhang, D. Bettoni, J. L. Zhang, H. L. Jiang, Jianping Zheng, S. X. Du, K. Y. Liu, M. Destefanis, X. Tang, M. Rolo, F. Cossio, and Tao Luo

Subjects
Physics, Nuclear physics, Cross section (physics), Angular distribution, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Detector, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, 01 natural sciences, Storage ring
Abstract

The cross section of the process e+e-→ωχc0 is measured at center-of-mass energies from s=4.178 to 4.278 GeV using a data sample of 7 fb-1 collected with the BESIII detector operating at the BEPCII storage ring. The dependence of the cross section on s shows a resonant structure with mass of (4218.5±1.6(stat)±4.0(syst)) MeV/c2 and width of (28.2±3.9(stat)±1.6(syst)) MeV, respectively. This observation confirms and improves upon the result of a previous study. The angular distribution of the e+e-→ωχc0 process is extracted for the first time.

Published
2019
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45. Observation of the W -annihilation decay Ds+→ωπ+ and evidence for Ds+→ωK+

Author

Yaquan Fang, Shou-hua Zhu, Y. H. Zheng, Cong-Feng Qiao, Q. Liu, Tristan Weber, L. L. Ma, L. Gong, N. Yu. Muchnoi, X. S. Kang, M. Richter, K. Schoenning, Q. Y. Li, B. S. Zou, L. G. Xia, A. Amoroso, Y. H. Zhang, Z. Ning, F. De Mori, A. Dbeyssi, X. Y. Zhou, T. Y. Qi, X. F. Wang, Q. M. Ma, A. Mustafa, Y. Yuan, Y. S. Zhu, Yu Zhang, M. Kornicer, Angelo Rivetti, X D Shi, A. Julin, P. Kiese, X. L. Ji, S. L. Olsen, Z. Y. Wang, M. Kuessner, Ke Wang, I. Uman, Y. X. Xia, Y. J. Mao, S. L. Yang, R. A. Briere, H. X. Yang, I. Garzia, G. S. Huang, M. Bertani, Z. Haddadi, Z. Y. Zhang, X. K. Zhou, G. R. Liao, X. S. Jiang, Z. J. Xiao, J. C. Li, R. Poling, P. F. Duan, F. H. Heinsius, J. Zhuang, H. Liang, S. B. Liu, Gianfranco Morello, L. Yang, P. L. Chen, Fenfen An, Yunlong Zhang, H. L. Liu, G. A. Chelkov, Q. P. Ji, B. Q. Wang, D. Bettoni, Y. Ding, J. L. Zhang, B. L. Wang, Z. X. Meng, M. X. Luo, Y. G. Xie, D. V. Dedovich, Xu Zhou, B. J. Liu, B. Garillon, Huihui Liu, Y. Nefedov, A. Pitka, T. C. Zhao, X. H. Liu, J. G. Messchendorp, K. Goetzen, Jianping Zheng, S. Zhu, X. A. Xiong, O. Cakir, Y. G. Gao, W. S. Cheng, Yao Zhang, G. Li, G. Y. Tang, Zhiqing Liu, Z. Gao, L. Koch, A. Khoukaz, J. P. Dai, H. B. Li, M. M. Ma, Qiunan Xu, Y. H. Xie, Xiaozhong Huang, W. Kühn, S. L. Niu, Z. L. Dou, S. X. Du, A. A. Zafar, K. Y. Liu, Z. Y. You, Manuel Lara, X. Q. Li, Y. F. Long, K. Ravindran, C. L. Luo, X. Xia, Q. Zhou, Jie Zhao, C. C. Zhang, D. X. Lin, T. Johansson, J. F. Chang, Alexey Zhemchugov, H. M. Hu, C. D. Fu, B. Zhong, L. B. Guo, R. Baldini Ferroli, C. Q. Feng, J. Pellegrino, Xiao-Rui Lyu, M. Maggiora, Ling Zhao, M. Destefanis, A. Q. Guo, C. W. Wang, Z. A. Zhu, Ke Liu, Y. T. Tan, Lei Li, Z. Y. Deng, M. Ripka, M.G. Alekseev, F. H. Liu, J. Q. Zhang, Krisztian Peters, W. Gradl, A. N. Zhu, Tao Zhang, X. Tang, Q. A. Malik, G. Mezzadri, W. C. Yan, Z. A. Liu, M. Kuemmel, Matthew Glenn Kurth, Bibo Ke, Y. F. Wang, Nicolas Berger, M. Z. Wang, O. B. Kolcu, M. G. Zhao, Y. H. Yang, W. B. Yan, V. Prasad, J. W. Zhang, L. M. Gu, M. N. Achasov, X. X. Ma, R. P. Guo, J. Zhu, L. P. Zhou, X. Cai, K. H. Rashid, Y. M. Ma, W. M. Song, Lei Zhao, Xu Shan, H. J. Lu, T. Holtmann, Andrzej Kupsc, D. Y. Wang, L. Lavezzi, A. Calcaterra, Z. G. Zhao, S. Fegan, J. G. Lu, Xingguo Li, M. Rolo, J. Min, Z. L. Hou, C. P. Shen, L. J. Wu, L. Z. Liao, Yu Bai, H. H. Zhang, Y. Ban, P. Weidenkaff, Z. J. Sun, S. Maldaner, F. E. Maas, T. Hu, Z. G. Wang, J. Chai, G. S. Varner, H. Y. Zhang, G. F. Chen, O. Bakina, H. B. Liu, B. Kopf, Y. T. Liang, S. J. Chen, Y. J. Mo, G. X. Sun, J. V. Bennett, Li Yan, Z. Jiao, D. H. Zhang, F. Cossio, Z. B. Li, W. Ikegami Andersson, C. Z. Yuan, X. P. Xu, X. B. Ji, M. Tiemens, P. Patteri, C. Sowa, Y. B. Zhao, K. J. Zhu, D. Y. Liu, J. B. Jiao, P. L. Wang, X. Q. Hao, S. Nakhoul, R. Kliemt, W. Shan, Dan Wang, S. Gu, X. N. Li, M. L. Chen, Haiping Peng, Tao Luo, Z. H. Qin, S. Pacetti, A. Mangoni, Meng Wang, Muhammad Irshad, S. P. Wen, A. Guskov, J. Y. Zhang, Jie Yu, W. G. Li, A. G. Denig, J. Y. Liu, X. S. Qin, P. Larin, J. F. Sun, K. L. He, S. W. Han, J. Dong, X. R. Zhou, P. X. Shen, Y. K. Sun, T. Hussain, X. Y. Ma, W. X. Gong, B. X. Yu, Xiaoyu Zhou, Ke Li, T. J. Min, Z. Wu, X. L. Gao, Zhi Zeng, Q. Gao, Y. N. Gao, Y. K. Heng, Jimin Zhao, G. F. Xu, S. Nisar, F. A. Harris, G. Cibinetto, S. Jin, S. Spataro, W. L. Chang, S. Marcello, Y. Zhang, P. L. Li, Y. Zeng, I. R. Boyko, S. J. Zhao, C. J. Tang, Y. Hu, Zhiqing Zhang, Fang Liu, Zhe Sun, Cheng Li, C. H. Li, X. H. Sun, Y. P. Lu, C. Dong, Shulei Zhang, F. Y. Li, S. Lusso, Liqing Xu, C. F. Redmer, S. Sosio, X. Y. Shen, H. Leithoff, L. H. Wu, H. M. Liu, U. Wiedner, I. Denysenko, Feng Yan, Q. J. Xu, H. S. Chen, Alperen Yuncu, J. Z. Fan, F. Li, M. Qi, M. Savrie, J. F. Hu, H. J. Yang, J. C. Chen, Xuanhong Lou, D. Xiao, Magnus Wolke, F. C. Ma, Y. B. Chen, S. Leiber, H. L. Dai, Nasser Kalantar-Nayestanaki, G. F. Cao, Y. F. Liang, Xiaofeng Zhu, J. Z. Zhang, Joachim Pettersson, Yi Jin, J. J. Song, B. Y. Zhang, C. Morales Morales, L. Sun, Yue Pan, D. P. Jin, J. W. Li, Jun-Yi Zhang, N. Qin, Y. J. Xiao, Z. P. Zhang, X. Y. Song, J. F. Qiu, M. Papenbrock, M. Y. Dong, X. N. Ma, L. Fava, D. W. Bennett, Zujian Wang, F. Nerling, A. Zallo, J. J. Xu, Yang Zhang, J. H. Zou, Z. Q. Yang, S. S. Sun, J. D. Lu, C. Schnier, Y. Q. Wang, X. T. Huang, G. Rong, R. Farinelli, R. E. Mitchell, M. Fritsch, J. S. Huang, M. Kavatsyuk, C. X. Liu, Lingxuan Zhang, S. Qian, Q. An, Jialun Ping, H. L. Ma, D. M. Li, K. Zhang, M. H. Gu, R. Kiuchi, X. Y. Zhang, H. Y. Sheng, H. Muramatsu, B. X. Zhang, C. X. Yu, T. Khan, J. B. Liu, B. Zheng, R. G. Ping, M. Pelizaeus, Y. J. Sun, Yifan Yang, E. Boger, S. Ahmed, Y. X. Yang, F. Feldbauer, Feng Liu, Q. Zhao, Y. Z. Sun, Z. P. Mao, C. X. Lin, M. Ablikim, X. Y. Jiang, J. Fang, Tao Li, Ch. Rosner, Alexander Leon Gilman, M. Rump, Gang Zhao, Zongyuan Wang, H. R. Qi, Y. P. Guo, Q. Ouyang, Serkant Ali Cetin, S. S. Fang, Y. B. Liu, X. L. Luo, K. Begzsuren, W. P. Wang, F. Bianchi, M. Albrecht, Huanhuan Liu, W. D. Li, B. T. Tsednee, G. Felici, Y. Fu, I. Tapan, I. B. Nikolaev, Y. H. Yan, J. W. Zhao, J. H. Yin, Y. C. Zhu, M. Shao, Y. T. Gu, H. J. Li, Q. L. Xiu, T. Held, Mario Greco, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, X. H. Mo, L. S. Wang, M. H. Ye, L. L. Wang, H. Cai, L. Y. Dong, W. J. Zheng, and J. Libby

Subjects
Physics, Annihilation, Luminosity (scattering theory), 010308 nuclear & particles physics, Electron–positron annihilation, media_common.quotation_subject, Detector, 01 natural sciences, Asymmetry, Nuclear physics, Amplitude, 0103 physical sciences, 010306 general physics, media_common
Abstract

We report the observation of W-annihilation decay Ds+→ωπ+ and evidence for Ds+→ωK+ in a data sample corresponding to an integrated luminosity of 3.19 fb-1 collected with the BESIII detector at a center-of-mass energy s=4.178 GeV. We obtain the branching fractions B(Ds+→ωπ+)=(1.77±0.32stat±0.13sys)×10-3 with a significance of 6.7σ and B(Ds+→ωK+)=(0.87±0.24stat±0.08sys)×10-3 with a significance of 4.4σ. This measurement provides critical information to determine the nonperturbative W-annihilation amplitudes and shows the potential of searching for CP asymmetry in Ds+→ωK+.

Published
2019
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46. Study of the process e+e−→pp¯ via initial state radiation at BESIII

Author

S. L. Yang, J. Min, G. R. Liao, C. Sowa, Y. B. Zhao, L. J. Wu, Yunlong Zhang, D. Bettoni, J. L. Zhang, F. Li, H. B. Liu, F. C. Ma, W. Shan, J. Dong, H. L. Jiang, Y. Fu, Jianping Zheng, Fang Liu, L. Koch, A. Khoukaz, Tao Luo, B. X. Yu, Y. J. Mo, U. Wiedner, I. Denysenko, Shulei Zhang, F. Y. Li, H. S. Chen, Alperen Yuncu, R. Baldini Ferroli, B. Kopf, H. L. Dai, Krisztian Peters, S. Malde, I. B. Nikolaev, J. H. Yin, M. Z. Wang, K. L. He, Y. H. Yan, J. W. Zhao, S. Nisar, C. J. Tang, S. W. Han, B. Y. Zhang, Y. Hu, Y. P. Lu, X. N. Li, J. F. Sun, S. X. Du, Haiping Peng, Y. C. Zhu, J. Libby, Q. Liu, Tristan Weber, L. L. Ma, L. Gong, Jimin Zhao, P. L. Li, H. J. Lu, J. G. Lu, M. Shao, Y. T. Gu, S. Marcello, Y. Zeng, Y. J. Lin, X D Shi, Ke Wang, Zhe Sun, S. Lusso, Z. G. Wang, H. Y. Zhang, Y. H. Zheng, Cong-Feng Qiao, M. M. Ma, R. Poling, C. F. Redmer, T. Liu, J. F. Qiu, M. Papenbrock, L. Fava, K. Y. Liu, M. Destefanis, F. H. Heinsius, Yaquan Fang, M. Greco, Shou-hua Zhu, L. G. Xia, A. Amoroso, Fenfen An, F. F. Sui, M. H. Gu, B. L. Wang, R. Kiuchi, Zhiqing Liu, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Bibo Ke, W. B. Yan, T. Held, T. C. Zhao, A. Dbeyssi, A. Sarantsev, Matthew Glenn Kurth, D. H. Wei, P. R. Li, J. S. Lange, M. Qi, F. E. Maas, T. Hu, H. J. Yang, Xiang-Gan Liu, Xujin Yuan, G. F. Chen, J. Y. Zhang, H. Y. Sheng, M. H. Ye, R. Kappert, F. Nerling, Z. X. Meng, X. L. Li, N. Yu. Muchnoi, K. Schoenning, Q. Y. Li, B. S. Zou, T. Johansson, O. Bakina, J. F. Chang, X. S. Kang, J. J. Song, L. Sun, Y. J. Mao, H. X. Yang, S. Pacetti, Y. F. Wang, Y. H. Zhang, X. L. Gao, C. X. Yu, S. L. Olsen, I. Garzia, S. B. Liu, Yang Zhang, X. A. Xiong, Q. A. Malik, G. Mezzadri, H. W. Wen, W. C. Yan, L. Y. Dong, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, H. B. Li, O. B. Kolcu, Angelo Rivetti, R. Farinelli, Y. Nefedov, M. Kuemmel, B. Zheng, Q. P. Ji, N. Huesken, I. R. Boyko, F. De Mori, X. Cai, L. Lavezzi, C. L. Luo, R. G. Ping, Z. Y. Wang, Teresa Lenz, Ke Li, Z. A. Liu, A. A. Zafar, P. X. Shen, Y. K. Heng, Z. Jiao, L. M. Gu, M. N. Achasov, L. P. Zhou, D. H. Zhang, Z. Wu, Q. Zhou, X. N. Ma, X. F. Cui, B. Garillon, V. Prasad, Huihui Liu, M. Richter, Y. M. Ma, W. Imoehl, Z. Ning, S. Y. Xiao, Liqing Xu, X. Y. Shen, X. H. Liu, M. Y. Dong, Y. Ban, P. Weidenkaff, G. F. Xu, H. L. Ma, D. M. Li, Z. P. Mao, H. Muramatsu, S. P. Wen, Zhiqing Zhang, S. Jin, C. C. Zhang, B. Zhong, L. B. Guo, P. L. Wang, X. S. Qin, G. S. Huang, X. R. Zhou, Meng Wang, Muhammad Irshad, W. J. Zhu, X. D. Shi, Lei Li, M.G. Alekseev, J. Fang, J. P. Dai, Cheng Li, X. K. Zhou, B. Wang, J. H. Zou, J. G. Messchendorp, T. Hussain, X. Y. Ma, M. Pelizaeus, M. Albrecht, X. F. Wang, S. S. Sun, I. Uman, M. Fritsch, Jun-Yi Zhang, K. H. Rashid, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, W. X. Gong, Dan Wang, S. Gu, W. D. Li, A. N. Zhu, Q. M. Ma, Zongyuan Wang, A. Mustafa, Tao Zhang, M. Kavatsyuk, Ch. Rosner, M. Bertani, L. Yang, S. Ahmed, Y. X. Yang, S. Qian, Q. An, Jialun Ping, X. H. Mo, L. S. Wang, K. Zhang, Xiao-Rui Lyu, Y. Ding, Xu Shan, H. Liang, I. Balossino Balossino, X. Y. Zhang, Y. T. Liang, X. Y. Song, B. T. Tsednee, J. Q. Zhang, Zujian Wang, B. X. Zhang, S. J. Zhao, B. J. Liu, F. A. Harris, W. L. Chang, Z. P. Zhang, H. Leithoff, A. Q. Guo, C. H. Li, X. H. Sun, Y. Yuan, Y. S. Zhu, C. W. Wang, Yu Zhang, A. Calcaterra, Z. G. Zhao, Lingxuan Zhang, L. L. Wang, H. Cai, Jacek Biernat, X. L. Wang, L. Z. Liao, Q. Zhao, J. B. Liu, Y. Z. Sun, I. K. Keshk, S. J. Chen, Y. T. Tan, R. E. Mitchell, Z. Gao, S. L. Niu, F. Feldbauer, W. Gradl, Y. J. Sun, Yifan Yang, Q. J. Xu, J. J. Xu, Z. Q. Yang, T. Y. Xing, D. Y. Chen, Feng Liu, X. P. Qin, Yu Bai, Ke Liu, H. H. Zhang, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, W. Kühn, Z. J. Sun, Z. J. Xiao, J. C. Chen, Y. F. Long, Xuanhong Lou, M. Ablikim, Viktor Thorén, Nasser Kalantar-Nayestanaki, X. Y. Jiang, J. Y. Liu, S. Maldaner, Q. Ouyang, C. Morales Morales, J. C. Li, S. S. Fang, Yue Pan, J. S. Huang, Yi Zhang, J. Zhuang, Z. Y. You, Z. A. Zhu, Q. Gao, Y. N. Gao, M. X. Luo, Y. Zhang, C. X. Liu, Feng Yan, D. V. Dedovich, J. Z. Fan, Xu Zhou, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, P. Kiese, Yuan Hou, J. Bloms, C. P. Shen, K. Goetzen, R. A. Briere, Y. B. Liu, E. M. Gersabeck, X. S. Jiang, X. L. Luo, J. D. Lu, Z. H. Qin, R. X. Yang, H. H. Wang, Wei Xu, Q. Q. Song, A. Pitka, P. Adlarson, Xiaozhong Huang, W. G. Li, A. G. Denig, X. L. Ji, X. T. Huang, Y. K. Sun, Xiaoyu Zhou, G. Rong, S. Spataro, Y. P. Guo, K. Begzsuren, W. P. Wang, H. M. Liu, Andrzej Kupsc, Z. Y. Zhang, Serkant Ali Cetin, J. F. Hu, F. Bianchi, M. L. Chen, L. H. Wu, G. F. Cao, D. Y. Liu, J. B. Jiao, Y. G. Xie, M. Savrie, Yi Jin, J. W. Li, Li Zhou, R. M. Wang, Magnus Wolke, Y. F. Liang, L. Y. Liu, Y. J. Xiao, D. P. Jin, Huanhuan Liu, G. Felici, N. Qin, Z. L. Dou, H. J. Li, X. H. Li, Q. L. Xiu, Xingchao Dai, C. Dong, S. Sosio, Joachim Pettersson, X. Tang, M. Rolo, F. Cossio, K. J. Zhu, Y. H. Xie, M. Maggiora, Ling Zhao, Lei Zhao, Z. L. Hou, X. Q. Hao, S. Nakhoul, R. Kliemt, C. Z. Yuan, N. Cao, P. Larin, A. Mangoni, A. Guskov, G. Y. Tang, Jie Yu, Jie Zhao, D. X. Lin, Alexey Zhemchugov, H. M. Hu, M. Kuessner, F. H. Liu, Nicolas Berger, J. W. Zhang, T. J. Min, G. A. Chelkov, T. Y. Qi, M. Himmelreich, G. Cibinetto, Y. X. Xia, P. W. Luo, Zhang Li, Y. G. Gao, V. Rodin, X. P. Xu, X. B. Ji, P. Patteri, G. Wilkinson, W. S. Cheng, Yao Zhang, G. Li, C. D. Fu, C. Q. Feng, and Z. Y. Deng

Subjects
Physics, Luminosity (scattering theory), Proton, 010308 nuclear & particles physics, Electron–positron annihilation, Form factor (quantum field theory), 01 natural sciences, law.invention, Nuclear physics, law, 0103 physical sciences, Invariant mass, Center of mass, Born approximation, 010306 general physics, Collider
Abstract

The Born cross section for the process e+e-→pp¯ is measured using the initial state radiation technique with an undetected photon. This analysis is based on datasets corresponding to an integrated luminosity of 7.5 fb-1, collected with the BESIII detector at the BEPCII collider at center of mass energies between 3.773 and 4.600 GeV. The Born cross section for the process e+e-→pp¯ and the proton effective form factor are determined in the pp¯ invariant mass range between 2.0 and 3.8 GeV/c2 divided into 30 intervals. The proton form factor ratio (|GE|/|GM|) is measured in 3 intervals of the pp¯ invariant mass between 2.0 and 3.0 GeV/c2.

Published
2019
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47. Search for baryon and lepton number violation in J/ψ→Λc+e−+c.c

Author

Y. J. Mo, Z. X. Meng, X. A. Xiong, C. Sowa, Y. B. Zhao, W. Shan, A. A. Zafar, J. Dong, X. Q. Hao, Qiang Zhao, S. Nisar, C. J. Tang, K. H. Rashid, Y. Hu, Y. H. Zheng, R. Farinelli, Y. P. Lu, Y. T. Liang, A. Calcaterra, Z. G. Zhao, S. Fegan, Xichao Ruan, S. J. Chen, K. J. Li, Q. P. Ji, I. R. Boyko, P. Larin, Cong-Feng Qiao, H. L. Ma, P. L. Wang, D. M. Li, X. L. Luo, M. H. Gu, Liqing Xu, X. Y. Shen, N. Yu. Muchnoi, Yu Bai, X. S. Kang, Y. H. Zhang, H. H. Zhang, D. Xiao, H. Muramatsu, H. Y. Sheng, S. L. Olsen, W. P. Wang, Y. Ding, F. Bianchi, Z. J. Sun, Z. H. Wang, P. Musiol, Z. Y. Wang, C. Schnier, Y. Q. Wang, X. T. Huang, G. Rong, M. Pelizaeus, F. De Mori, C. X. Yu, L. Koch, A. Khoukaz, D. Y. Liu, B. J. Liu, J. F. Sun, X. Y. Zhou, B. Zheng, R. G. Ping, L. H. Wu, T. Holtmann, J. C. Li, M. Savrie, Zongyuan Wang, M. M. Ma, Yi Jin, Bibo Ke, W. Kühn, W. B. Yan, Z. Y. You, Z. A. Zhu, X. H. Mo, L. S. Wang, M. H. Ye, R. Baldini Ferroli, S. Marcello, Y. Zeng, X. K. Chu, Y. J. Xiao, J. Y. Liu, J. Zhuang, M. X. Luo, Q. Ouyang, Krisztian Peters, M. Z. Wang, Q. A. Malik, G. Mezzadri, W. C. Yan, X. H. Liu, Zhe Sun, S. Pacetti, J. P. Dai, X. F. Wang, L. L. Wang, H. Cai, G. Y. Tang, X. Q. He, P. Kiese, D. V. Dedovich, Z. Y. Qu, Q. M. Ma, S. S. Fang, Y. B. Liu, Q. Gao, J. Chai, Y. H. Xie, J. Pellegrino, X. N. Li, C. P. Shen, Y. N. Gao, A. Mustafa, G. X. Sun, J. V. Bennett, Li Yan, Peilian Liu, Z. Jiao, Haiping Peng, Manuel Lara, D. H. Zhang, Y. X. Zhou, Jie Zhao, D. X. Lin, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Alexey Zhemchugov, H. M. Hu, X. Y. Niu, I. Tapan, S. B. Liu, Y. H. Yan, I. Uman, Y. Nefedov, R. A. Briere, Jun-Yi Zhang, Huanhuan Liu, G. Felici, Lingxuan Zhang, X. N. Ma, Z. P. Zhang, Y. Yuan, Y. S. Zhu, M. Maggiora, Ling Zhao, Lei Zhao, S. Ahmed, Y. X. Yang, Ke Li, Z. L. Hou, J. J. Song, Meng Wang, B. X. Yu, Zhi Zeng, L. Y. Dong, D. W. Bennett, Zujian Wang, F. H. Liu, Nicolas Berger, J. W. Zhang, L. Sun, Yunlong Zhang, Yu Zhang, Q. Liu, Tristan Weber, Kang Li, W. J. Zheng, R. Kliemt, H. J. Li, H. B. Li, Fang Liu, M. N. Achasov, A. Zallo, L. P. Zhou, C. L. Luo, X. Xia, M. Fritsch, Q. L. Xiu, Z. A. Liu, G. S. Huang, X. S. Jiang, C. C. Zhang, D. Bettoni, J. L. Zhang, B. Zhong, L. B. Guo, M. Kavatsyuk, F. A. Harris, S. Q. Zhang, Jie Yu, L. L. Ma, L. Gong, L. G. Xia, A. Amoroso, Y. M. Ma, Zhiqing Liu, F. Y. Li, H. S. Chen, Alperen Yuncu, Z. P. Mao, Y. X. Xia, V. Prasad, I. B. Nikolaev, X. K. Zhou, U. Wiedner, I. Denysenko, J. H. Yin, J. W. Zhao, Y. C. Zhu, H. L. Dai, Lei Li, Y. Z. Sun, Z. J. Xiao, P. L. Chen, H. Leithoff, F. Li, Y. Ban, P. Weidenkaff, B. X. Zhang, M. Shao, Y. T. Gu, A. Dbeyssi, Xiao-Rui Lyu, C. Z. Yuan, Jianping Zheng, A. Pitka, S. Zhu, T. Ma, F. C. Ma, T. J. Min, K. J. Zhu, G. Cibinetto, M. Kuhlmann, T. Johansson, J. F. Chang, Y. G. Gao, S. P. Wen, M. Kornicer, G. R. Liao, X. S. Qin, B. Y. Zhang, X. R. Zhou, J. Fang, Tao Li, Yao Wang, O. Cakir, Gang Zhao, E. Fioravanti, Cheng Li, J. F. Qiu, M. Papenbrock, A. Julin, B. Q. Wang, S. X. Du, M. G. Zhao, Y. H. Yang, R. P. Guo, J. Zhu, G. S. Varner, Ke Wang, K. Y. Liu, L. Fava, X. L. Kang, A. Sarantsev, D. H. Wei, P. R. Li, Y. F. Wang, T. Khan, O. B. Kolcu, F. Nerling, X. Fang, J. S. Lange, X. Cai, J. Q. Li, H. Xiao, F. Feldbauer, J. Z. Bai, Z. L. Huang, Yang Zhang, Feng Liu, M. Destefanis, M. Ablikim, X. Y. Jiang, Ch. Rosner, R. Poling, M. Kuessner, L. Lavezzi, P. F. Duan, F. H. Heinsius, Gianfranco Morello, T. Held, M. Kuemmel, Fenfen An, C. Hu, B. L. Wang, X. Tang, Magnus Wolke, X. L. Ji, T. C. Zhao, T. Hussain, M. Y. Dong, G. A. Chelkov, M. Rolo, Y. F. Liang, D. P. Jin, Z. Y. Zhang, X. Y. Ma, W. X. Gong, Dan Wang, Y. G. Xie, S. Gu, J. M. Bian, Z. L. Dou, S. J. Zhao, M. Richter, Z. Ning, H. Liang, X. P. Xu, X. B. Ji, M. Tiemens, M. Albrecht, W. D. Li, X. L. Gao, C. Dong, S. Sosio, B. T. Tsednee, Dayong Wang, N. Qin, P. Patteri, Joachim Pettersson, J. H. Zou, C. H. Li, Xiaozhong Huang, Q. J. Xu, X. H. Sun, S. S. Sun, J. C. Chen, Xuanhong Lou, Yao Zhang, Z. Gao, G. Li, S. L. Niu, Ke Liu, S. Leiber, Nasser Kalantar-Nayestanaki, X. Q. Li, Y. F. Long, C. D. Fu, C. Morales Morales, Yue Pan, R. E. Mitchell, Z. G. Wang, C. Q. Feng, X. R. Chen, Yaquan Fang, M. Greco, H. Y. Zhang, Shou-hua Zhu, Andrzej Kupsc, Z. Y. Deng, M. Ripka, Z. B. Li, M. L. Chen, W. Ikegami Andersson, G. F. Chen, Xingguo Li, J. Y. Zhang, K. Schoenning, Q. Y. Li, B. S. Zou, Y. K. Heng, G. F. Xu, S. Jin, X. Y. Song, K. Goetzen, L. D. Liu, J. J. Xu, J. S. Huang, C. X. Liu, A. Q. Guo, J. B. Jiao, W. M. Song, S. Qian, Q. An, Jialun Ping, K. Zhang, X. Y. Zhang, J. B. Liu, Y. J. Sun, Yifan Yang, E. Boger, H. R. Qi, Y. P. Guo, Serkant Ali Cetin, Z. H. Qin, W. G. Li, A. G. Denig, Y. K. Sun, S. Spataro, M. Qi, H. J. Yang, H. M. Liu, G. F. Cao, Y. J. Mao, H. X. Yang, I. Garzia, Huihui Liu, J. P. Liu, J. G. Messchendorp, Qiunan Xu, J. Min, H. B. Liu, B. Kopf, K. L. He, C. Leng, S. W. Han, Jimin Zhao, P. L. Li, C. F. Redmer, M. Bertani, Z. Haddadi, L. Yang, J. Q. Zhang, W. Gradl, D. Y. Wang, H. J. Lu, J. G. Lu, F. E. Maas, T. Hu, O. Bakina, P. X. Shen, Z. Wu, Zhiqing Zhang, and L. J. Wu

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron, 01 natural sciences, Lepton number, law.invention, Baryon, Positron, law, 0103 physical sciences, 010306 general physics, Collider
Abstract

Using 1.31×109 J/ψ events collected by the BESIII detector at the Beijing Electron Positron Collider, we search for the process J/ψ→Λc+e-+c.c. for the first time. In this process, both baryon and lepton number conservation is violated. No signal is found and the upper limit on the branching fraction B(J/ψ→Λc+e-+c.c.) is set to be 6.9×10-8 at the 90% confidence level.

Published
2019
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48. Precision measurements of the e+e−→KS0K±π∓ Born cross sections at center-of-mass energies between 3.8 and 4.6 GeV

Author

S. Ahmed, Y. X. Yang, Kang Li, J. F. Qiu, M. Papenbrock, Xichao Ruan, Ke Wang, L. Fava, Y. H. Zheng, Cong-Feng Qiao, N. Yu. Muchnoi, M. H. Gu, H. Y. Sheng, M. Bertani, Z. Haddadi, L. Yang, R. Poling, P. F. Duan, F. H. Heinsius, Gianfranco Morello, Fenfen An, B. L. Wang, Y. Z. Sun, F. Nerling, X. Q. Hao, S. Nakhoul, F. De Mori, M. H. Ye, C. X. Yu, T. C. Zhao, Q. A. Malik, G. Mezzadri, W. C. Yan, Yang Zhang, H. B. Li, X. S. Kang, Y. H. Zhang, S. L. Olsen, M. Kuessner, L. D. Liu, S. B. Liu, L. Koch, A. Khoukaz, B. X. Yu, M. Kuemmel, P. Larin, C. L. Luo, Zhi Zeng, F. Y. Li, X. Y. Zhou, H. S. Chen, Alperen Yuncu, X. Xia, B. Zheng, H. L. Dai, R. Baldini Ferroli, Gang Zhao, L. Y. Dong, R. G. Ping, Zhiqing Liu, M. G. Zhao, Y. H. Yang, Z. Y. Wang, Krisztian Peters, M. Z. Wang, T. Khan, Y. Nefedov, X. N. Li, Z. P. Zhang, Y. T. Tan, R. P. Guo, M. N. Achasov, J. Zhu, L. P. Zhou, Haiping Peng, Y. M. Ma, S. Qian, Q. An, Jialun Ping, C. C. Zhang, B. Zhong, L. B. Guo, Lei Li, Y. Ding, W. Gradl, G. A. Chelkov, Huanhuan Liu, D. Y. Wang, D. W. Bennett, Zujian Wang, B. J. Liu, Z. A. Liu, G. Y. Tang, Z. P. Mao, J. Fang, Tao Li, W. J. Zheng, T. Johansson, J. F. Chang, J. Min, J. J. Xu, K. Zhang, X. L. Ji, X. Y. Zhang, H. B. Liu, J. B. Liu, F. Feldbauer, Manuel Lara, O. B. Kolcu, T. Ma, W. G. Li, X. F. Wang, Jie Zhao, D. X. Lin, V. Prasad, Z. X. Meng, B. Kopf, Dan Wang, Xu Shan, X. H. Liu, R. Farinelli, A. G. Denig, Y. Ban, Y. J. Sun, Yifan Yang, W. Kühn, J. C. Li, E. Boger, P. Weidenkaff, Ch. Rosner, S. Gu, J. P. Dai, J. Libby, Yaquan Fang, Alexey Zhemchugov, H. M. Hu, Y. H. Xie, J. Pellegrino, X. A. Xiong, F. H. Liu, X. Cai, L. Lavezzi, K. L. He, J. S. Huang, C. X. Liu, S. W. Han, G. Felici, S. P. Wen, M. Maggiora, Ling Zhao, R. Kliemt, I. B. Nikolaev, Lei Zhao, Z. L. Hou, G. R. Liao, Z. Y. Zhang, Z. Y. You, Z. A. Zhu, J. M. Zhang, Jimin Zhao, P. L. Li, J. Zhuang, H. L. Ma, M. X. Luo, D. M. Li, B. Q. Wang, Shou-hua Zhu, D. V. Dedovich, H. Muramatsu, M. Pelizaeus, Y. K. Sun, S. Spataro, M. Richter, Z. Ning, C. F. Redmer, K. Schoenning, Q. Y. Li, B. S. Zou, X. S. Qin, X. R. Zhou, Y. P. Lu, Cheng Li, Y. G. Xie, C. P. Shen, Q. M. Ma, J. F. Sun, Nicolas Berger, J. W. Zhang, S. Marcello, C. Sowa, Y. B. Zhao, J. H. Yin, M. Shao, Y. T. Gu, J. Q. Zhang, H. J. Lu, P. L. Wang, C. Z. Yuan, T. Holtmann, L. J. Wu, J. G. Lu, A. Mustafa, X. Y. Niu, Meng Wang, A. A. Zafar, E. Fioravanti, X. K. Chu, M. Qi, Y. Zeng, Zhe Sun, S. Lusso, H. Liang, H. J. Yang, J. Y. Liu, Q. P. Ji, M. Kuhlmann, Z. L. Dou, W. Shan, J. Dong, Y. J. Mo, X. K. Zhou, H. M. Liu, F. E. Maas, Z. L. Huang, K. H. Rashid, T. Hu, Feng Liu, M. Ablikim, X. Y. Jiang, Y. Yuan, Y. S. Zhu, T. Y. Qi, A. Calcaterra, Z. G. Zhao, S. Fegan, Yu Zhang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, G. F. Xu, H. J. Li, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Qiang Zhao, S. Nisar, S. Jin, J. J. Song, Q. L. Xiu, A. Guskov, O. Bakina, L. Sun, J. F. Hu, Xiao-Rui Lyu, F. A. Harris, C. J. Tang, Y. Hu, Yu Bai, H. H. Zhang, Y. X. Xia, Lingxuan Zhang, Ke Liu, P. X. Shen, Z. J. Sun, H. Leithoff, Y. T. Liang, Q. Gao, D. Xiao, Z. Gao, Z. Wu, H. R. Qi, X. Y. Song, Q. Liu, G. S. Varner, Y. N. Gao, I. R. Boyko, T. J. Min, K. J. Zhu, S. J. Chen, Y. Zhang, X. H. Mo, L. S. Wang, S. L. Niu, G. F. Cao, M. M. Ma, Y. X. Zhou, Y. G. Gao, Liqing Xu, K. Goetzen, Zhiqing Zhang, G. Cibinetto, X. Y. Shen, K. J. Li, Tristan Weber, Yao Wang, L. L. Ma, J. Z. Fan, L. Gong, Y. P. Guo, L. L. Wang, H. Cai, J. Chai, X. Q. Li, G. X. Sun, J. V. Bennett, Li Yan, X. N. Ma, Z. Jiao, D. H. Zhang, A. Zallo, X. L. Luo, L. G. Xia, A. Amoroso, X. P. Xu, X. B. Ji, M. Tiemens, M. Fritsch, P. Patteri, C. Schnier, Y. Q. Wang, M. Kavatsyuk, X. T. Huang, G. Rong, Y. F. Long, M. Alekseev, Yao Zhang, G. Li, W. P. Wang, B. X. Zhang, Serkant Ali Cetin, F. Bianchi, L. H. Wu, C. D. Fu, M. Savrie, A. Q. Guo, Yi Jin, A. Dbeyssi, C. Q. Feng, X. R. Chen, Y. J. Xiao, D. Y. Liu, J. B. Jiao, M. Kornicer, Zongyuan Wang, A. Julin, Q. Ouyang, S. S. Fang, W. M. Song, Y. B. Liu, K. Y. Liu, Z. H. Qin, Z. B. Li, W. Ikegami Andersson, Y. F. Wang, X D Shi, Y. J. Mao, H. X. Yang, T. Hussain, X. Y. Ma, I. Garzia, W. X. Gong, B. Garillon, Huihui Liu, J. G. Messchendorp, Qiunan Xu, C. H. Li, X. H. Sun, P. Kiese, R. A. Briere, G. S. Huang, X. S. Jiang, A. Pitka, O. Cakir, M. Y. Dong, I. Tapan, Y. H. Yan, J. W. Zhao, J. H. Zou, S. S. Sun, Y. C. Zhu, T. Held, Mario Greco, R. E. Mitchell, Bibo Ke, M. Albrecht, W. B. Yan, W. D. Li, B. T. Tsednee, S. Pacetti, Ke Li, Fang Liu, U. Wiedner, I. Denysenko, Xiaozhong Huang, B. Y. Zhang, Andrzej Kupsc, M. L. Chen, Magnus Wolke, Y. F. Liang, D. P. Jin, Dayong Wang, N. Qin, I. Uman, Z. J. Xiao, P. L. Chen, Yunlong Zhang, D. Bettoni, J. L. Zhang, Jianping Zheng, S. Zhu, S. X. Du, M. Destefanis, X. L. Gao, C. Dong, S. Sosio, S. J. Zhao, Joachim Pettersson, Q. J. Xu, X. Tang, J. C. Chen, Xuanhong Lou, M. Rolo, S. Leiber, Nasser Kalantar-Nayestanaki, C. Morales Morales, Yue Pan, F. Cossio, Z. G. Wang, H. Y. Zhang, G. F. Chen, J. Y. Zhang, Y. K. Heng, Z. Y. Deng, M. Ripka, Xingguo Li, F. Li, and F. C. Ma

Subjects
Nuclear physics, Physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Detector, Pi, Measure (physics), Center of mass, Born approximation, 010306 general physics, 01 natural sciences, Storage ring
Abstract

Using data samples collected by the BESIII detector operating at the BEPCII storage ring, we measure the e+e- → K0SK±π∓ Born cross sections at center-of-mass energies between 3.8 and 4.6 GeV, corre ...

Published
2019
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49. Measurement of the branching fraction of J/ψ→ωη′π+π− and search for J/ψ→ωX(1835) , X(1835)→η′π+π− decay

Author

L. M. Gu, M. N. Achasov, L. P. Zhou, Y. M. Ma, Z. P. Mao, J. Fang, Ch. Rosner, J. Libby, Yaquan Fang, M. Greco, Shou-hua Zhu, H. Liang, Q. P. Ji, Ke Liu, K. Schoenning, Q. Y. Li, B. S. Zou, Xiao-Rui Lyu, W. Imoehl, M. M. Ma, X. H. Liu, J. P. Dai, J. Bloms, J. Chai, G. X. Sun, J. V. Bennett, Li Yan, X. L. Ji, Z. Jiao, D. H. Zhang, C. Sowa, Y. B. Zhao, W. Shan, Y. H. Zheng, Z. Y. Zhang, H. J. Lu, J. G. Lu, J. Dong, Ke Wang, Cong-Feng Qiao, N. Yu. Muchnoi, X. S. Kang, S. Nisar, Y. H. Zhang, C. J. Tang, Y. Hu, F. E. Maas, S. L. Olsen, A. Q. Guo, C. W. Wang, Y. P. Lu, T. Hu, Magnus Wolke, Z. Y. Wang, Teresa Lenz, R. Poling, Y. G. Xie, Y. F. Liang, X. L. Li, O. Bakina, D. P. Jin, F. H. Heinsius, Li Zhou, M. Kuessner, Fenfen An, Zhiqing Liu, Z. H. Qin, J. Min, Y. Ding, M. Albrecht, N. Qin, B. L. Wang, H. B. Liu, Z. L. Dou, X D Shi, Jun-Yi Zhang, Xiaozhong Huang, Y. J. Mao, B. J. Liu, B. Kopf, Xujin Yuan, P. X. Shen, H. X. Yang, W. D. Li, B. T. Tsednee, T. Y. Xing, T. C. Zhao, I. Garzia, T. Johansson, J. F. Chang, K. L. He, Z. Wu, S. B. Liu, S. W. Han, Zujian Wang, X. L. Wang, M. Z. Wang, Y. Nefedov, Jimin Zhao, X. Tang, P. L. Li, B. Garillon, Huihui Liu, Y. Fu, G. A. Chelkov, J. D. Lu, W. Kühn, Zhiqing Zhang, Y. F. Wang, C. F. Redmer, Andrzej Kupsc, Tao Luo, Y. H. Yan, J. W. Zhao, M. Qi, X. T. Huang, M. Rolo, J. G. Messchendorp, H. J. Yang, Y. H. Xie, R. Kappert, M. Y. Dong, Y. C. Zhu, G. Rong, Z. Y. You, Z. A. Zhu, O. B. Kolcu, M. L. Chen, B. X. Yu, X. Cai, M. Maggiora, Ling Zhao, F. Cossio, T. Held, L. Lavezzi, W. G. Li, K. J. Zhu, A. G. Denig, Y. K. Sun, Shulei Zhang, F. Y. Li, Xiaoyu Zhou, L. H. Wu, G. F. Xu, Lei Zhao, Z. L. Hou, S. Spataro, H. S. Chen, Alperen Yuncu, M. Savrie, C. P. Shen, I. Uman, Yi Jin, J. Q. Zhang, H. L. Dai, S. Jin, J. W. Li, Lei Li, M. Bertani, L. Koch, H. M. Liu, A. Khoukaz, L. J. Wu, R. M. Wang, J. F. Hu, L. Yang, Yunlong Zhang, J. H. Zou, Y. J. Xiao, R. Baldini Ferroli, G. F. Cao, M. Richter, Z. X. Meng, X. A. Xiong, D. Bettoni, Krisztian Peters, J. L. Zhang, Z. J. Xiao, Z. Ning, S. Y. Xiao, Y. J. Mo, C. Z. Yuan, N. Cao, A. A. Zafar, S. S. Sun, H. L. Jiang, Y. T. Tan, W. Gradl, Jianping Zheng, X. N. Li, Haiping Peng, K. H. Rashid, S. X. Du, K. Y. Liu, Y. T. Liang, X. K. Zhou, M. Destefanis, X. L. Gao, S. J. Zhao, T. Y. Qi, S. J. Chen, X. Y. Song, Xiang-Gan Liu, C. Dong, R. E. Mitchell, S. Sosio, Joachim Pettersson, Q. J. Xu, Fang Liu, I. R. Boyko, J. C. Chen, Xuanhong Lou, Viktor Thorén, Y. X. Xia, Nasser Kalantar-Nayestanaki, U. Wiedner, I. Denysenko, Q. Liu, K. Goetzen, Tristan Weber, Liqing Xu, C. Morales Morales, L. L. Ma, L. Gong, L. G. Xia, Yue Pan, A. Amoroso, A. Dbeyssi, Angelo Rivetti, Z. G. Wang, H. Y. Zhang, F. De Mori, X. Y. Shen, X. F. Wang, G. F. Chen, Q. M. Ma, A. Mustafa, J. Y. Zhang, Y. Yuan, Y. S. Zhu, Yu Zhang, H. W. Wen, B. Y. Zhang, Y. K. Heng, Y. G. Gao, M. G. Zhao, Y. H. Yang, X. X. Ma, R. P. Guo, J. Zhu, J. J. Xu, Z. Q. Yang, J. S. Huang, C. X. Liu, X. Q. Hao, S. Nakhoul, Bibo Ke, W. B. Yan, P. Larin, J. F. Sun, S. Pacetti, N. Huesken, S. Marcello, Y. Zeng, Y. J. Lin, Zhe Sun, G. Y. Tang, Ke Li, T. Hussain, S. Lusso, X. Y. Ma, F. Li, Jie Zhao, D. X. Lin, W. X. Gong, Alexey Zhemchugov, H. M. Hu, F. H. Liu, F. C. Ma, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, Nicolas Berger, J. J. Song, J. W. Zhang, C. H. Li, X. H. Sun, L. Sun, P. Kiese, Yuan Hou, R. A. Briere, T. Liu, J. F. Qiu, M. Papenbrock, X. S. Jiang, L. Fava, R. X. Yang, H. H. Wang, Wei Xu, A. Pitka, P. Adlarson, F. Nerling, Z. Gao, P. W. Luo, Yang Zhang, S. L. Niu, X. Q. Li, Y. F. Long, M. Kuemmel, Matthew Glenn Kurth, Lingxuan Zhang, Chen, Yi Zhang, P. L. Wang, Meng Wang, X. F. Cui, Muhammad Irshad, S. Q. Qu, Z. B. Li, W. Ikegami Andersson, F. A. Harris, W. L. Chang, V. Rodin, Z. P. Zhang, H. Leithoff, X. P. Qin, X. P. Xu, X. B. Ji, D. Y. Liu, Z. A. Liu, G. S. Huang, P. Patteri, J. B. Jiao, W. J. Zhu, V. Prasad, R. Kliemt, X. D. Shi, Dan Wang, A. Mangoni, Y. Ban, P. Weidenkaff, A. Guskov, Jie Yu, J. C. Li, S. P. Wen, S. L. Yang, X. S. Qin, T. J. Min, G. R. Liao, X. R. Zhou, J. Zhuang, S. Qian, Q. An, Jialun Ping, G. Cibinetto, M. X. Luo, Cheng Li, K. Zhang, D. V. Dedovich, X. Y. Zhang, Xu Zhou, W. S. Cheng, J. B. Liu, Yao Zhang, G. Li, F. F. Sui, M. H. Gu, Y. J. Sun, Yifan Yang, R. Kiuchi, H. Y. Sheng, C. D. Fu, C. Q. Feng, A. Calcaterra, Z. G. Zhao, Z. Y. Deng, M. Ripka, C. X. Yu, L. Z. Liao, Q. Q. Song, Yu Bai, H. H. Zhang, B. Zheng, R. G. Ping, Y. P. Guo, Z. J. Sun, Serkant Ali Cetin, S. Maldaner, H. B. Li, C. L. Luo, Q. Zhou, C. C. Zhang, B. Zhong, L. B. Guo, M.G. Alekseev, A. N. Zhu, Tao Zhang, Xu Shan, M. H. Ye, T. Khan, F. Feldbauer, L. Y. Dong, Z. L. Huang, Feng Liu, M. Ablikim, X. Y. Jiang, X. N. Ma, B. Wang, M. Fritsch, M. Kavatsyuk, Zongyuan Wang, B. X. Zhang, I. B. Nikolaev, J. H. Yin, M. Shao, Y. T. Gu, Q. Ouyang, S. S. Fang, A. Sarantsev, D. H. Wei, P. R. Li, J. S. Lange, Y. B. Liu, X. H. Mo, L. S. Wang, X. L. Luo, L. L. Wang, H. Cai, Jacek Biernat, K. Begzsuren, W. P. Wang, F. Bianchi, Huanhuan Liu, G. Felici, H. J. Li, X. H. Li, Q. L. Xiu, Xingchao Dai, S. Ahmed, Y. X. Yang, Q. Zhao, Y. Z. Sun, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, M. Rump, Gang Zhao, J. Y. Liu, Q. Gao, Y. N. Gao, Y. Zhang, Feng Yan, J. Z. Fan, R. Farinelli, H. L. Ma, D. M. Li, H. Muramatsu, M. Pelizaeus, Q. A. Malik, G. Mezzadri, and W. C. Yan

Subjects
Physics, Nuclear physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, 0103 physical sciences, Pi, High Energy Physics::Experiment, 010306 general physics, 01 natural sciences, Omega
Abstract

Using a sample of 1.31 x 10(9) J/psi events collected by the BESIII detector at BEPCII during 2009 and 2012, we study the J/psi -> omega eta'pi(+)pi(-) thorn p-hadronic process. For the first ti ...

Published
2019
Full Text
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50. Observation ofχcJ→4KS0

Author

D. Y. Liu, J. B. Jiao, Z. X. Meng, X. A. Xiong, C. Dong, S. Sosio, J. Y. Liu, H. H. Liu, Wu L. H., A. A. Zafar, Y. H. Xie, J. Pellegrino, F. E. Maas, T. Hu, Y. Yang, J. Zhuang, M. X. Luo, D. V. Dedovich, C. Sowa, Y. B. Zhao, F. Li, Li J. C., W. Shan, K. H. Rashid, A. Calcaterra, Z. G. Zhao, S. Fegan, Xu Q. J., L. Z. Liao, Yu Bai, H. H. Zhang, Joachim Pettersson, Z. J. Sun, S. Maldaner, Q. Gao, Y. N. Gao, Y. Zhang, Huanhuan Liu, Feng Yan, M. Y. Dong, Y. H. Zheng, Cong-Feng Qiao, M. Maggiora, Z. L. Hou, J. Dong, Gu L. M., O. Bakina, C. L. Luo, Y. T. Liang, R. Kliemt, G. Felici, Y. H. Yan, A. Mangoni, X. Xia, Q. Zhou, I. Uman, J. W. Zhao, T. Khan, Tao Luo, C. C. Zhang, B. Zhong, L. B. Guo, A. N. Zhu, Xu G. F., X. S. Kang, Tao Zhang, Yunlong Zhang, Q. A. Malik, G. Mezzadri, W. C. Yan, J. H. Zou, Ye M. H., Xu Shan, S. Nisar, Y. H. Zhang, D. Bettoni, Z. G. Wang, Y. C. Zhu, J. L. Zhang, H. L. Jiang, S. J. Chen, C. J. Tang, Y. Hu, Y. P. Lu, A. Guskov, Qi T. Y., Jianping Zheng, F. De Mori, S. L. Olsen, J. F. Qiu, M. Papenbrock, L. Fava, Z. J. Xiao, P. L. Chen, Li X. Q., S. Zhu, M. Qi, Ji Q. P., J. F. Sun, S. B. Liu, T. J. Min, K. J. Zhu, Shulei Zhang, S. Qian, Q. An, Jialun Ping, F. Feldbauer, He K. L., Y. Nefedov, K. J. Li, X. Y. Zhou, H. Y. Zhang, S. S. Sun, Z. L. Huang, M. N. Achasov, L. P. Zhou, Z. Y. Wang, K. Zhang, Liangbin Li, X. Y. Zhang, G. Cibinetto, K. Y. Liu, H. S. Chen, Alperen Yuncu, P. X. Shen, Z. Wu, C. Z. Yuan, F. Nerling, H. J. Yang, G. F. Chen, J. Y. Zhang, D. Xiao, Z. P. Mao, M. Ablikim, Q. L. Xiu, T. Held, Mario Greco, P. W. Luo, H. L. Dai, S. Marcello, Y. Ding, X. Y. Jiang, B. J. Liu, Ma X. N., M. Destefanis, J. B. Liu, Zhiqing Zhang, R. E. Mitchell, X. H. Liu, Y. J. Sun, E. Boger, P. L. Wang, X. F. Wang, S. Jin, M. Kuessner, Y. Zeng, Zhe Sun, S. Lusso, W. Kühn, Mo Y. J., X. L. Luo, Ji X. B., X. Tang, Z. Y. You, Z. A. Zhu, A. Mustafa, Li X. L., Ke Wang, Fang Liu, J. P. Dai, J. Fang, Tao Li, X. Y. Niu, Fu C. D., J. L. Hu, Y. K. Heng, K. Begzsuren, W. P. Wang, X. T. Huang, G. A. Chelkov, Y. Yuan, Y. S. Zhu, C. P. Shen, U. Wiedner, Ma H. L., F. Bianchi, M. Rolo, I. Denysenko, Xu X. P., M. Richter, S. J. Zhao, G. Rong, R. Poling, Y. B. Chen, Xiaofeng Zhu, J. Z. Zhang, P. F. Duan, F. H. Heinsius, M. Albrecht, Yu J. S., Z. Ning, Rinaldo Baldini Ferroli, Q. Liu, Tristan Weber, Li P. L., J. J. Song, B. L. Wang, Li H. B., J. Chai, X D Shi, G. X. Sun, J. V. Bennett, Li Yan, Li P. R., Ma L. L., L. Gong, B. Y. Zhang, L. Sun, L. G. Xia, Qi H. R., B. T. Tsednee, Gu M. H., J. C. Chen, Xuanhong Lou, M. Tiemens, X. K. Zhou, Ke B. C., A. Amoroso, Q. P. Ji, S. Leiber, Wu L. J., T. C. Zhao, A. Dbeyssi, Gu Y. T., I. R. Boyko, Nasser Kalantar-Nayestanaki, F. Cossio, J. Min, Muhammad Irshad, Magnus Wolke, Z. Jiao, D. H. Zhang, M. Savrie, X. Y. Song, Liqing Xu, X. Y. Shen, C. Morales Morales, Y. J. Mao, H. X. Yang, I. Garzia, Yue Pan, Li J. W., Ma Y. M., H. B. Liu, Y. F. Liang, M. Kornicer, Angelo Rivetti, P. Patteri, Lu J. G., Li Q. Y., Yi Jin, Hu H. M., Y. P. Guo, L. D. Liu, C.-H. Rosner, B. Kopf, Ma X. Y., D. P. Jin, A. Julin, Yu B. X., J. Libby, Qu S. Q., Yu C. X., J. Q. Zhang, T. Johansson, J. F. Chang, Li D. M., L. Koch, A. Khoukaz, Y. F. Wang, Y. J. Xiao, Ma M. M., S. W. Han, O. B. Kolcu, F. A. Harris, W. L. Chang, Du S. X., Yaquan Fang, M. G. Zhao, Y. H. Yang, X. Cai, R. P. Guo, J. Zhu, L. Lavezzi, Shou-hua Zhu, Serkant Ali Cetin, Jun-Yi Zhang, W. B. Yan, M. Fritsch, Q. Ouyang, M. Alekseev, Li W. G., N. Qin, H. Leithoff, Jimin Zhao, M. Kavatsyuk, Z. Q. Yang, Li K. J., W. S. Cheng, S. S. Fang, S. Pacetti, G. Li, Li H. J., Xiaozhong Huang, S. L. Yang, C. F. Redmer, Li X. N., Z. P. Zhang, B. X. Zhang, Krisztian Peters, Y. B. Liu, M. Bertani, Z. Haddadi, L. Yang, M. Z. Wang, B. Garillon, G. R. Liao, C. Q. Feng, X. R. Chen, Andrzej Kupsc, K. Schoenning, J. S. Huang, Z. Y. Deng, Lu Y. P., D. W. Bennett, B. S. Zou, Y. T. Tan, W. Gradl, M. Ripka, Z. Liu, M. L. Chen, Haiping Peng, B. Q. Wang, C. X. Liu, Zujian Wang, D. Y. Wang, J. G. Messchendorp, He X. Q., H. Liang, M. Kuemmel, Matthew Glenn Kurth, Ma Q. M., Li W. D., K. Goetzen, L. Zhao, Dan Wang, A. Q. Guo, Z. Y. Peng, C. W. Wang, Xiao-Rui Lyu, N. Y.-U. Muchnoi, W. M. Song, X. Q. Hao, S. Nakhoul, P. Larin, An F. F., Z. H. Qin, G. Y. Tang, Z. Y. Zhang, A. G. Denig, Jie Zhao, D. X. Lin, R. Farinelli, Y. K. Sun, Alexey Zhemchugov, S. Spataro, F. H. Liu, Nicolas Berger, Li F. Y., Y. G. Xie, J. W. Zhang, H. Muramatsu, M. Pelizaeus, S. Ahmed, Y. X. Yang, H. M. Liu, Li Z. B., Z. L. Dou, Q. Zhao, Y. Z. Sun, I. K. Keshk, C. X. Lin, Alexander Leon Gilman, Gang Zhao, G. F. Cao, Y. X. Xia, Xu J. J., Ji X. L., Y. G. Gao, L. S. Wang, M. H. Ye, L. L. Wang, H. Cai, X. K. Chu, Mo X. H., L. Y. Dong, W. J. Zheng, I. B. Nikolaev, J. H. Yin, Lu H. J., M. Shao, Lingxuan Zhang, A. Sarantsev, D. H. Wei, J. S. Lange, Ma F. C., F. F. Sui, R. Kiuchi, H. Y. Sheng, B. Zheng, R. G. Ping, Z. A. Liu, V. Prasad, Y. Ban, P. Weidenkaff, S. P. Wen, X. S. Qin, X. R. Zhou, P. Kiese, R. A. Briere, G. S. Huang, X. S. Jiang, R. X. Yang, H. H. Wang, A. Pitka, Z. Gao, S. L. Niu, Y. F. Long, W. Ikegami Andersson, T. Hussain, W. X. Gong, C. H. Li, X. H. Sun, and X. L. Gao

Subjects
Physics, Particle physics
Published
2019
Full Text
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