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Your search keyword '"Marco Giovanni Maria Destefanis"' showing total 22 results
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22 results on '"Marco Giovanni Maria Destefanis"'

1. Measurement of the Ωc0 lifetime at Belle II

Author

Shubhangi Krishan Maurya, Swagato Banerjee, Thomas E Browder, Rajesh Kumar MAITI, Jyotirmoi Borah, Saurabh Sandilya, Hiroaki Aihara, Andrzej Bożek, Shawn Dubey, Lu Cao, Alberto Martini, Dmitri Liventsev, Markus Tobias Prim, Ichiro Adachi, Eduard De La Cruz Burelo, Christoph Schwanda, Robin Leboucher, Jan Strube, Angelo Di Canto, Laura Zani, Armine Rostomyan, MIN-ZU WANG, Michel Enrique Hernández Villanueva, Daniel Ferlewicz, Carlos Marinas, Bruce Yabsley, Fernando Abudinén, Giuseppe Finocchiaro, Emilie Bertholet, Longke Li, Arthur Eugen Bolz, ZACHARY LIPTAK, Diego Tonelli, Norayr Akopov, Paolo Branchini, Leo Piilonen, Ewan Hill, Ezio Torassa, Stephan Paul, Sam Cunliffe, Thanh Dong, Latika Aggarwal, Mario Merola, Jake Bennett, Peter Kodyš, Justine Serrano, Ivan Heredia de la Cruz, Marcello Campajola, Livio Lanceri, Michel Bertemes, Masako Iwasaki, Nguyen Anh Ky, Manca Mrvar, Isamu Nakamura, Riccardo Manfredi, J B Singh, Vipin Gaur, Andreas Warburton, Robert Kowalewski, Hossain Ahmed, Kevin Varvell, Paul Jackson, Marco Giovanni Maria Destefanis, Mirco Dorigo, Torben Ferber, Gianluca Inguglia, Chang-Zheng Yuan, Giulio Dujany, Akimasa Ishikawa, Michael Roney, Giacomo De Pietro, Henrik Junkerkalefeld, Alberto Aloisio, Seongbae Yang, Chaoyi Lyu, David Asner, Ludovico Massaccesi, Chia-Ling Hsu, Priyanka Cheema, Sebastiano Raiz, Kiyoshi Tanida, and Elena Solovieva

Published
2023
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2. Radon detector development using a PIN photodiode

Author

Lorenzo Visca, Antonio Amoroso, Roberta Calabria, Giorgio Cotto, Aldo Crosetto, Marco Giovanni Maria Destefanis, Elisabetta Alessandra Durisi, Francesco Mallamace, Pier Paolo Trapani, and Lorenzo Zamprotta

Subjects
silicon photodiode, alpha spectroscopy, continuous radon monitor, radon device intercomparison, radon network
Abstract

An active device for radon detection in air has been developed in the frame of a project carried out by the Physics Department of the University of Torino with the aim to create a monitoring network of radon concentration in the University workplaces. The device uses a commercial planar photodiode, sensitive to alpha particles, and a dedicated electronic chain integrated in an approx. 30 mm by 50 mm printed circuit board (PCB), designed in order to minimize the power consumption. The device can be used not only as alpha particles counter (using the digital output) but also for alpha spectroscopy, connecting the analog signal output from the shaper amplifier to a Multichannel Analyzer (MCA). In this paper, the first prototype of the detector will be presented with the preliminary experimental results. The spectroscopic performances of the device were tested, integrating the sensor in a commercial aluminum box and acquiring the alpha particle spectrum from a calibration source and from rock samples used as radon sources. The radon sensitivity of the detector, in terms of (Counts per hour)/(Bq m−3), was assessed by the comparison with a calibrated commercial radon detector (RAD7 Durridge Inc.). In conclusion, the final prototype will be presented. It is characterized by a new 3d printed plastic case in black PA12 for light shielding, covered by a conductive paint in order to minimize the electromagnetic noise.

Published
2023

3. Amplitude analysis and branching-fraction measurement of Ds+→KS0K−π+π+

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Riccardo Farinelli, Riccardo Aliberti, Lia Lavezzi, Jens Sören Lange, Onur Bugra Kolcu, Alfons Khoukaz, Marco Giovanni Maria Destefanis, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Giulio Mezzadri, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Nuclear physics, Physics, Amplitude, 010308 nuclear & particles physics, Branching fraction, 0103 physical sciences, Detector, 010306 general physics, Collision, 01 natural sciences
Abstract

Using 6.32 fb−1 of e+e− collision data collected by the BESIII detector at the center-of-mass energies between 4.178 and 4.226 GeV, an amplitude analysis of the D+s → K0SK−π+π+ decays is performed ...

Published
2021
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4. Determination of the Λc+ spin via the reaction e+e−→ΛcΛ¯c

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Yunxuan Song, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Qiang Zhao, Riccardo Farinelli, Riccardo Aliberti, Lia Lavezzi, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Onur Bugra Kolcu, Alfons Khoukaz, Yuxiang Zhao, Marco Giovanni Maria Destefanis, Weimin Song, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Peirong Li, Xiang Liu, Giulio Mezzadri, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Atomic physics, 010306 general physics, 01 natural sciences, Spin-½
Abstract

We report on a comparison of two possible Λ+c spin hypotheses, J=½ and 3/2, via the process e+e− → Λ+c¯Λ−c, using the angular distributions of Λ+c decays into pK0S, Λπ+, Σ0π+, and Σ+π0. The data we ...

Published
2021
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5. Search for the semileptonic decay D0(+)→b1(1235)−(0)e+νe

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Yunxuan Song, Alessio Mangoni, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Qiang Zhao, Riccardo Farinelli, Riccardo Aliberti, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Onur Bugra Kolcu, Alfons Khoukaz, Yuxiang Zhao, Marco Giovanni Maria Destefanis, Weimin Song, Vindhyawasini Prasad, Banzragch Tsednee, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Peirong Li, Xiang Liu, Giulio Mezzadri, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Semileptonic decay, Physics, Particle physics, Annihilation, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, 01 natural sciences, law.invention, law, 0103 physical sciences, High Energy Physics::Experiment, 010306 general physics, Collider, Energy (signal processing)
Abstract

Using 2.93 fb−1 of e+e− annihilation data collected at a center-of-mass energy √s=3.773 GeV with the BESIII detector operating at the BEPCII collider, we search for the semileptonic D0(+) decays ...

Published
2020
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6. Improved model-independent determination of the strong-phase difference between D0 and D¯0→KS,L0K+K− decays

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Yunxuan Song, Alessio Mangoni, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Qiang Zhao, Riccardo Farinelli, Anatoliy Guskov, Riccardo Aliberti, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Onur Bugra Kolcu, Alfons Khoukaz, Yuxiang Zhao, Marco Giovanni Maria Destefanis, Weimin Song, Krishnakumar Ravindran, Banzragch Tsednee, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Peirong Li, Xiang Liu, Giulio Mezzadri, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Phase difference, Physics, Particle physics, Meson, 010308 nuclear & particles physics, Bar (music), High Energy Physics::Phenomenology, 0103 physical sciences, High Energy Physics::Experiment, Charm (quantum number), Nuclear Experiment, 010306 general physics, 01 natural sciences
Abstract

We present a measurement of the strong-phase difference between D-0 and (D) over bar (0) -> (KS,LK+K-)-K-0 decays, performed through a study of quantum-entangled pairs of charm mesons. The measu ...

Published
2020
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7. Inclusive charged and neutral particle multiplicity distributions in χcJ and J/ψ decays

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Alessio Mangoni, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Riccardo Farinelli, Anatoliy Guskov, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Onur Bugra Kolcu, Alfons Khoukaz, Marco Giovanni Maria Destefanis, Vindhyawasini Prasad, Banzragch Tsednee, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Xiang Liu, Giulio Mezzadri, Alberto Bortone, Tord Johansson, Fabio Cossio, and Karin Schoenning

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Astrophysics::High Energy Astrophysical Phenomena, 0103 physical sciences, High Energy Physics::Experiment, Multiplicity (chemistry), 010306 general physics, Neutral particle, 01 natural sciences
Abstract

Using a sample of 106 million psi(3686) decays, psi(3686) -> gamma chi(cJ) (J = 0, 1, 2) and psi(3686) -> gamma chi(cJ), chi(cJ) -> gamma J/psi (J = 1, 2) events are utilized to study incl ...

Published
2020
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8. Observation of the Y(4220) and Y(4390) in the process e+e−→ηJ/ψ

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Yunxuan Song, Alessio Mangoni, Hajime Muramatsu, Xin Shi, Michela Greco, Alexey Zhemchugov, Qiang Zhao, Riccardo Farinelli, Anatoliy Guskov, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Onur Bugra Kolcu, Alfons Khoukaz, Yuxiang Zhao, Marco Giovanni Maria Destefanis, Weimin Song, Banzragch Tsednee, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Peirong Li, Xiang Liu, Giulio Mezzadri, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Analytical chemistry, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, 01 natural sciences
Abstract

The cross sections of the process e(+)e(-) -> eta J/psi lip at center-of-mass energies (root s) between 3.81 and 4.60 GeV are measured with high precision by using data samples collected with th ...

Published
2020
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9. Study of the process e+e−→π0π0J/ψ and neutral charmoniumlike state Zc(3900)0

Author

Stefano Spataro, Peilian Li, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Riccardo Farinelli, Anatoliy Guskov, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Onur Bugra Kolcu, Alfons Khoukaz, Marco Giovanni Maria Destefanis, Banzragch Tsednee, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Xiang Liu, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Pi, Analytical chemistry, State (functional analysis), 010306 general physics, 7. Clean energy, 01 natural sciences, 3. Good health
Abstract

Cross sections of the process e(+)e(-) -> pi(0)pi(0)J/psi at center-of-mass energies between 3.808 and 4.600 GeV are measured with high precision by using 12.4 fb(-1) of data samples collected w ...

Published
2020
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10. Measurement of the Born cross sections for e+e−→Ds+Ds1(2460)−+c.c. and e+e−→Ds*+Ds1(2460)−+c.c

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Alessio Mangoni, Hongbang Liu, Hajime Muramatsu, Xin Shi, Michela Greco, Alexey Zhemchugov, Riccardo Farinelli, Anatoliy Guskov, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Onur Bugra Kolcu, Nils Huesken, Alfons Khoukaz, Marco Giovanni Maria Destefanis, Banzragch Tsednee, Kamal Saoucha, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Xiang Liu, Giulio Mezzadri, Alberto Bortone, Fabio Cossio, and Karin Schoenning

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, Analytical chemistry, 010306 general physics, 01 natural sciences
Abstract

The processes e(+)e(-) -> D-s(+) D-s1 (2460)(-) + c.c. and e(+) e(-) -> D-s*(+) D-s1 (2460)(-)+ c.c. are studied for the first time using data samples collected with the BESIII detector at th ...

Published
2020
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11. Model-independent determination of the relative strong-phase difference between D0 and D¯0→KS,L0π+π− and its impact on the measurement of the CKM angle γ/ϕ3

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Alessio Mangoni, Hajime Muramatsu, Michela Greco, Alexey Zhemchugov, Riccardo Farinelli, Yifang Wang, Lei Li, Lia Lavezzi, Jens Sören Lange, Onur Bugra Kolcu, Nils Huesken, Alfons Khoukaz, Marco Giovanni Maria Destefanis, Banzragch Tsednee, Patrik Adlarson, Mikhail Achasov, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Xiang Liu, Giulio Mezzadri, Fabio Cossio, and Karin Schoenning

Subjects
Phase difference, Physics, Particle physics, Meson, 010308 nuclear & particles physics, Bar (music), High Energy Physics::Phenomenology, 01 natural sciences, 0103 physical sciences, Pi, High Energy Physics::Experiment, Variety (universal algebra), 010306 general physics, Computer Science::Databases
Abstract

Crucial inputs for a variety of CP-violation studies can be determined through the analysis of pairs of quantum-entangled neutral D mesons, which are produced in the decay of the psi(3770) resonanc ...

Published
2020
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12. Measurement of J/ψ→Ξ(1530)−Ξ¯+ and evidence for the radiative decay Ξ(1530)−→γΞ−

Author

Stefano Spataro, Antonio Amoroso, Ilaria BALOSSINO, Meike Kuessner, Alessio Mangoni, Hongbang Liu, Hajime Muramatsu, Xin Shi, Michela Greco, Alexey Zhemchugov, Riccardo Farinelli, Anatoliy Guskov, Yifang Wang, Lia Lavezzi, Jens Sören Lange, Onur Bugra Kolcu, Nils Huesken, Alfons Khoukaz, Marco Giovanni Maria Destefanis, Vindhyawasini Prasad, Banzragch Tsednee, Patrik Adlarson, Johan Messchendorp, Ralf Kliemt, Hongrong Qi, Giulio Mezzadri, Fabio Cossio, and Karin Schoenning

Subjects
Physics, Nuclear physics, 010308 nuclear & particles physics, Electron–positron annihilation, 0103 physical sciences, Radiative decay, 010306 general physics, 01 natural sciences, Bar (unit)
Abstract

The SU(3)-flavor violating decay J/psi -> Xi(1530)(-) (Xi) over bar (+) + c.c. is studied using (1310.6 +/- 7.0) x 10(6) J/psi events collected with the BESIII detector at BEPCII, and the branch ...

Published
2020
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13. Observation ofhcRadiative Decayhc→γη′and Evidence forhc→γη

Author

SERKANT ALİ ÇETİN, Ronald Poling, Andrzej Kupsc, Hongbang Liu, Dayong Wang, Hajime Muramatsu, ALPEREN YÜNCÜ, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Xiang Zhou, Riccardo Farinelli, Xiaonan Li, Jake Bennett, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Meng Wang, Marco Giovanni Maria Destefanis, Weimin Song, Chang-Zheng Yuan, Johan Messchendorp, Ralf Kliemt, Frank Maas, Peirong Li, Xiang Liu, Tord Johansson, Mingyi Dong, and Hong-Hao Zhang

Subjects
Physics, 010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, 010306 general physics, 01 natural sciences
Published
2016
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14. Observation ofe+e−→ωχc1,2nears=4.42and 4.6 GeV

Author

SERKANT ALİ ÇETİN, Ronald Poling, Andrzej Kupsc, Hongbang Liu, Dayong Wang, Hajime Muramatsu, ALPEREN YÜNCÜ, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Xiang Zhou, Riccardo Farinelli, Xiaonan Li, Fu-Hu Liu, Jake Bennett, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Meng Wang, Marco Giovanni Maria Destefanis, Valentina Santoro, Weimin Song, Chang-Zheng Yuan, Johan Messchendorp, Ralf Kliemt, Frank Maas, Peirong Li, Xiang Liu, Tord Johansson, Mingyi Dong, and Hong-Hao Zhang

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

Based on data samples collected with the BESIII detector operating at the BEPCII storage ring at center-of-mass energies root s > 4.4 GeV, the processes e(+)e(-) -> omega chi(c1,2) are observed for the first time. With an integrated luminosity of 1074 pb(-1) near root s = 4.42 GeV, a significant omega chi(c2) signal is found, and the cross section is measured to be (20.9 +/- 3.2 +/- 2.5) pb. With 567 pb(-1) near root s = 4.6 GeV, a clear omega chi(c2) signal is seen, and the cross section is measured to be (9.5 +/- 2.1 +/- 1.3) pb, while evidence is found for an omega chi(c2) signal. The first errors are statistical, and the second are systematic. Due to low luminosity or low cross section at other energies, no significant signals are observed. In the omega chi(c2) cross section, an enhancement is seen around root s = 4.42 GeV. Fitting the cross section with a coherent sum of the psi(4415) Breit-Wigner function and a phase-space term, the branching fraction B(psi(4415) -> omega chi(c2)) is obtained to be of the order of 10(-3).

Published
2016
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15. Confirmation of a charged charmoniumlike stateZc(3885)∓ine+e−→π±(DD¯*)∓with doubleDtag

Author

Ronald Poling, Antonio Amoroso, Gianluigi Cibinetto, Andrzej Kupsc, Hongbang Liu, Hajime Muramatsu, ALPEREN YÜNCÜ, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Xiaonan Li, Fu-Hu Liu, Jake Bennett, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Liaoyuan Dong, Bin Wang, Francesca De Mori, Marco Giovanni Maria Destefanis, Valentina Santoro, Weimin Song, Chang-Zheng Yuan, Johan Messchendorp, Ralf Kliemt, Frank Maas, Peirong Li, Xiang Liu, Tord Johansson, Mingyi Dong, Sinan Kuday, and Hong-Hao Zhang

Subjects
Physics, Nuclear and High Energy Physics, Meson, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Analytical chemistry, State (functional analysis), 01 natural sciences, Nuclear physics, Isospin, 0103 physical sciences, D meson, Pi, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Bar (unit)
Abstract

We present a study of the process e(+)e(-) -> pi(+/-) (D (D) over bar*)(-/+) using data samples of 1092 pb(-1) at root s = 4.23 GeV and 826 pb(-1) at root s = 4.26 GeV collected with the BESIII detector at the BEPCII storage ring. With full reconstruction of the D meson pair and the bachelor pi(+) in the final state, we confirm the existence of the charged structure Z(c) (3885)(-/+) in the (D (D) over bar*)(-/+) system in the two isospin processes e(+)e(-) -> pi(+DD)-D-0*(-) and e(+)e(-) -> pi+D-D*(0). By performing a simultaneous fit, the statistical significance of Zc(3885)(-/+) signal is determined to be greater than 10 sigma, and its pole mass and width are measured to be M-pole = (3881.7 +/- 1.6(stat) +/- 1.6(syst)) MeV/c(2) and Gamma(pole) = (26.6 +/- 2.0(stat) +/- 2.1(syst)) MeV, respectively. The Born cross section times the (D (D) over bar*)(-/+) branching fraction (sigma(e(+)e(-) -> pi(+/-)Z(c)(3885)(-/+)) x Br(Z(c)(3885)(-/+) -> (D (D) over bar*)(-/+) )) is measured to be (141.6 +/- 7.9(stat) +/- 12.3(syst)) pb at root s = 4.23 GeV and (108.4 +/- 6.9(stat) +/- 8.8(syst)) pb at root s = 4.26 GeV. The polar angular distribution of the pi(+) - Z(c)(3885)(-/+) system is consistent with the expectation of a quantum number assignment of J(P) = 1(+) for Z(c)(3885)(-/+).

Published
2015
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16. Amplitude analysis of theπ0π0system produced in radiativeJ/ψdecays

Author

Ronald Poling, Antonio Amoroso, Gianluigi Cibinetto, Andrzej Kupsc, Peng Guo, Hongbang Liu, Dayong Wang, Hajime Muramatsu, ALPEREN YÜNCÜ, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Nickolai Muchnoi, Xiaonan Li, Fu-Hu Liu, Jake Bennett, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Liaoyuan Dong, Francesca De Mori, Marco Giovanni Maria Destefanis, Weimin Song, Xiaolin Kang, Johan Messchendorp, Ralf Kliemt, Peirong Li, Xiang Liu, Tord Johansson, Mingyi Dong, and Sinan Kuday

Subjects
Quantum chromodynamics, Physics, Nuclear and High Energy Physics, Particle physics, 010308 nuclear & particles physics, Branching fraction, Electron–positron annihilation, Partial wave analysis, 01 natural sciences, Nuclear physics, Amplitude, 0103 physical sciences, Piecewise, Radiative transfer, High Energy Physics::Experiment, 010306 general physics, Scalar meson
Abstract

An amplitude analysis of the pi(0)pi(0) system produced in radiative J/psi decays is presented. In particular, a piecewise function that describes the dynamics of the pi(0)pi(0) system is determined as a function of M pi(0)pi(0) from an analysis of the (1.311 +/- 0.011) x 10(9) J/psi decays collected by the BESIII detector. The goal of this analysis is to provide a description of the scalar and tensor components of the pi(0)pi(0) system while making minimal assumptions about the properties or number of poles in the amplitude. Such a model-independent description allows one to integrate these results with other related results from complementary reactions in the development of phenomenological models, which can then be used to directly fit experimental data to obtain parameters of interest. The branching fraction of J/psi -> pi(0)pi(0) is determined to be (1.15 +/- 0.05) x 10(-3), where the uncertainty is systematic only and the statistical uncertainty is negligible.

Published
2015
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18. Observation of theψ(1 D23)State ine+e−→π+π−γχc1at BESIII

Author

Jifeng Hu, Ronald Poling, Antonio Amoroso, Gianluigi Cibinetto, Andrzej Kupsc, Zhiqing Liu, Hongbang Liu, Laura Zotti, Dayong Wang, Hajime Muramatsu, ALPEREN YÜNCÜ, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Nickolai Muchnoi, Xiaonan Li, Fu-Hu Liu, Jake Bennett, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Simone Pacetti, Liaoyuan Dong, Francesca De Mori, Ivan Nikolaev, Marco Giovanni Maria Destefanis, Valentina Santoro, Weimin Song, Chang-Zheng Yuan, Johan Messchendorp, Ralf Kliemt, Frank Maas, Peirong Li, Xiang Liu, Tord Johansson, and Mingyi Dong

Subjects
010308 nuclear & particles physics, 0103 physical sciences, General Physics and Astronomy, 010306 general physics, 01 natural sciences
Published
2015
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19. Searches for isospin-violating transitionsχc0,2→π0ηc

Author

Jifeng Hu, Ronald Poling, Antonio Amoroso, Gianluigi Cibinetto, Andrzej Kupsc, Hongbang Liu, Dayong Wang, Hajime Muramatsu, ALPEREN YÜNCÜ, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Nickolai Muchnoi, Xiaonan Li, Fu-Hu Liu, Jake Bennett, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Simone Pacetti, Liaoyuan Dong, Francesca De Mori, Ivan Nikolaev, Marco Giovanni Maria Destefanis, Valentina Santoro, Weimin Song, Chang-Zheng Yuan, Johan Messchendorp, Ralf Kliemt, Frank Maas, Peirong Li, Tord Johansson, Mingyi Dong, and Hong-Hao Zhang

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

We present the first upper-limit measurement of the branching fractions of the isospin-violating transitions chi(c0,2) -> pi(0)eta(c). The measurements are performed using 106 x 10(6) psi(3686) events accumulated with the BESIII detector at the BEPCII e(+)e(-) collider at a center-of-mass energy corresponding to the psi(3686) mass. We obtained upper limits on the branching fractions at a 90% confidence level of B(chi(c0) -> pi(0)eta(c)) pi(0)eta(c)) < 3.2 x 10(-3).

Published
2015
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20. Study of the near-thresholdωϕmass enhancement in doubly OZI-suppressedJ/ψ→γωϕdecays

Author

Stefano Spataro, Jifeng Hu, Ronald Poling, Hongbang Liu, Dayong Wang, Hajime Muramatsu, Michela Greco, Ulrich Wiedner, Fenfen An, Alexey Zhemchugov, Qiang Zhao, Nickolai Muchnoi, Xiaonan Li, Fu-Hu Liu, Jake Bennett, Xun Chen, Onur Albayrak, Roy A. Briere, Orhan CAKIR, Yifang Wang, Jens Sören Lange, Simone Pacetti, Liaoyuan Dong, Xiao-Rui Lyu, Ivan Nikolaev, Meng Wang, Marco Giovanni Maria Destefanis, Chang-Zheng Yuan, Johan Messchendorp, Frank Maas, Xiang Liu, Mingyi Dong, Hong-Hao Zhang, and Marco Maggiora

Subjects
Mass enhancement, Physics, Nuclear and High Energy Physics, Amplitude, Branching fraction, Electron–positron annihilation, Partial wave analysis, Pi, Analytical chemistry, Resonance, High Energy Physics::Experiment, Nuclear Experiment, Omega
Abstract

A 2:25 x 10(8) J/psi event sample accumulated with the BESIII detector is used to study the doubly Okubo-Zweig-Iizuka-suppressed decay modes J/psi -> gamma omega phi, omega -> pi(+)pi(-)pi(0), phi -> K+K-. A strong deviation (> 30 sigma) from three-body J/psi -> gamma omega phi phase space is observed near the omega phi mass threshold that is consistent with a previous observation reported by the BESII experiment. A partial wave analysis with a tensor covariant amplitude that assumes that the enhancement is due to the presence of a resonance, the X(1810), is performed and confirms that the spin-parity of the X(1810) is 0(++). The mass and width of the X(1810) are determined to be M = 1795 +/- 7(stat)(-5)(+13) (syst) +/- 19(mod) MeV/c(2) and Gamma = 95 +/- 10(stat)(-34)(+21)(syst) +/- 75(mod) MeV/c(2), respectively, and the product branching fraction is measured to be B(J/psi -> gamma X(1810)) x B(X(1810) -> omega phi) = (2.00 +/- 0.08(stat)(-1.00)(+0.45)(syst) +/- 1.30(mod)) x 10(-4). These results are consistent within errors with those of the BESII experiment. DOI: 10.1103/PhysRevD.87.032008

Published
2013
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22. Study of elementary reactions with the HADES dielectron spectrometer

Author

Agakichiev, G., Agodi, C., Balanda, A., Bellia, G., Belver, D., Belyaev, A., Blanco, A., Boehmer, M., Boyard, J. L., Braun-Munzinger, P., Cabanelas, P., Castro, E., Christ, T., Marco Giovanni Maria Destefanis, Diaz, J., Dohrmann, F., Dybczak, A., Fabbietti, L., Fateev, O., Finocchiaro, P., Fonte, P., Friese, J., Froelich, I., Galatyuk, T., Garzon, J. A., Gernhauser, R., Gil, A., Gilardi, C., Golubeva, M., Gonzalez-Diaz, D., Grosse, E., Guber, F., Heilmann, M., Hennino, T., Holzmann, R., Ierusalimov, A., Iori, I., Ivashkin, A., Jurkovic, M., Kampfer, B., Kanaki, K., Karavicheva, T., Kirschner, D., Koenig, I., Koenig, W., Kolb, B. W., Kotte, R., Kozuch, A., Krasa, A., Krizek, F., Krucken, R., Kuhn, W., Kugler, A., Kurepin, A., Lamas-Valverde, J., Lang, S., Lange, J. S., Lapidus, K., Lopes, L., Lorenz, M., Liu, T., Maier, L., Mangiarotti, A., Mar, J., Markert, J., Metag, V., Michalska, B., Michel, J., Mishra, D., Moriniere, E., Mousa, J., Muntz, C., Naumann, L., Novotny, R., Otwinowski, J., Pachmayer, Y. C., Palka, M., Parpottas, Y., Pechenov, V., Pechenova, O., Perez Cavalcanti, T., Pietraszko, J., Przygoda, W., Reshetin, A., Rustamov, A., Sadovsky, A., Salabura, P., Schmah, A., Simon, R., Sobolev, Yu G., Spataro, S., Spruck, B., Strobele, H., Stroth, J., Sturm, C., Sudol, M., Tarantola, A., Teilab, K., Tlustý, P., Traxler, M., Trebacz, R., Tsertos, H., Veretenkin, I., Wagner, V., Weber, M., Wisniowski, M., Wustenfeld, J., Yurevich, S., Zanevsky, Y. V., Zhou, P., and Zumbruch, P.

Abstract

Results obtained with the HADES dielectron spectrometer at GSI are discussed, with emphasis on dilepton production in elementary reactions.

Published
2010

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