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2. Revealing the short-range structure of the mirror nuclei

Author

S, Li, R, Cruz-Torres, N, Santiesteban, Z H, Ye, D, Abrams, S, Alsalmi, D, Androic, K, Aniol, J, Arrington, T, Averett, C Ayerbe, Gayoso, J, Bane, S, Barcus, J, Barrow, A, Beck, V, Bellini, H, Bhatt, D, Bhetuwal, D, Biswas, D, Bulumulla, A, Camsonne, J, Castellanos, J, Chen, J-P, Chen, D, Chrisman, M E, Christy, C, Clarke, S, Covrig, K, Craycraft, D, Day, D, Dutta, E, Fuchey, C, Gal, F, Garibaldi, T N, Gautam, T, Gogami, J, Gomez, P, Guèye, A, Habarakada, T J, Hague, J O, Hansen, F, Hauenstein, W, Henry, D W, Higinbotham, R J, Holt, C, Hyde, T, Itabashi, M, Kaneta, A, Karki, A T, Katramatou, C E, Keppel, M, Khachatryan, V, Khachatryan, P M, King, I, Korover, L, Kurbany, T, Kutz, N, Lashley-Colthirst, W B, Li, H, Liu, N, Liyanage, E, Long, J, Mammei, P, Markowitz, R E, McClellan, F, Meddi, D, Meekins, S Mey-Tal, Beck, R, Michaels, M, Mihovilovič, A, Moyer, S, Nagao, V, Nelyubin, D, Nguyen, M, Nycz, M, Olson, L, Ou, V, Owen, C, Palatchi, B, Pandey, A, Papadopoulou, S, Park, S, Paul, T, Petkovic, R, Pomatsalyuk, S, Premathilake, V, Punjabi, R D, Ransome, P E, Reimer, J, Reinhold, S, Riordan, J, Roche, V M, Rodriguez, A, Schmidt, B, Schmookler, E P, Segarra, A, Shahinyan, K, Slifer, P, Solvignon, S, Širca, T, Su, R, Suleiman, H, Szumila-Vance, L, Tang, Y, Tian, W, Tireman, F, Tortorici, Y, Toyama, K, Uehara, G M, Urciuoli, D, Votaw, J, Williamson, B, Wojtsekhowski, S, Wood, J, Zhang, and X, Zheng

Abstract

When protons and neutrons (nucleons) are bound into atomic nuclei, they are close enough to feel significant attraction, or repulsion, from the strong, short-distance part of the nucleon-nucleon interaction. These strong interactions lead to hard collisions between nucleons, generating pairs of highly energetic nucleons referred to as short-range correlations (SRCs). SRCs are an important but relatively poorly understood part of nuclear structure

Published
2021

3. Deep Exclusive Electroproduction of π0 at High Q2 in the Quark Valence Regime

Author

N. H. Saylor, D. Bulumulla, Wouter Deconinck, E. Pooser, L. Ye, B. Crowe, Weidong Li, B. P. Quinn, Y. Huang, Douglas Higinbotham, E. Fuchey, C. Ayerbe Gayoso, Y. Zhao, S. A. Wood, M. K. Jones, Darko Androić, Jie Liu, A. J. Sarty, Z. Ye, K. Hamilton, E. McClellan, M. E. Christy, A. Liyanage, J. Bane, F. Georges, O. F. Obretch, C. Gal, S. F. Ali, Bogdan Wojtsekhowski, P. M. King, C. Palatchi, F. Hauenstein, J. Roche, T. Averett, P. E. Reimer, J. P. Chen, G. M. Urciuoli, Franco Meddi, M. H. Shabestari, C. Fanelli, K. A. Aniol, R. I. Pomatsalyuk, B. Aljawrneh, Shams Rahman, C. E. Hyde, R. Beminiwattha, X. Yan, Andrew Puckett, E. Voutier, E. Cisbani, S. J. Nazeer, Chunhui Chen, C. Desnault, M. Carmignotto, O. Glamazdin, J. Castellano, Z. Ahmed, L. Ou, F. De Persio, Olfred Hansen, S. Allison, J. R. M. Annand, Simon Širca, T. Gautam, D. Nguyen, B. Sawatzky, G. M. Huber, S. Danagoulian, J. C. Cornejo, Tanja Horn, C. M. Jen, F. Tortorici, T. Su, S. Alsalmi, Yicheng Wang, G. Hamad, B. Duran, Kalyan Allada, Maxime Defurne, R. Michaels, Hongjun Liu, D. Gaskell, Juliette Mammei, David Hamilton, Pete Markowitz, L. A. Thorne, E. J. Brash, V. M. Gray, C. Munoz Camacho, D. Adikaram, T. W. Danley, Y. Tian, K. Park, Ping Zhu, L. S. Myers, M. N. H. Rashad, Rolf Ent, R. A. Montgomery, D. Biswas, S. Malace, W. Henry, A. Sun, M. Dlamini, H. Atac, N. Israel, R. Trotta, X. Bai, V. Bellini, N. Ton, R. Spies, Alexandre Camsonne, A. Stefanko, C. Gu, K. Bartlett, K. Jin, B. A. Clary, Kondo Gnanvo, M. Nycz, T. Holmstrom, P.-J. Lin, Shanfeng Li, C. Yero, T. Hague, Taya Chetry, Jie Zhang, J. Bericic, J. Campbell, A. Mkrtchyan, Nikos Sparveris, K. Mesik, I. Sapkota, Vladimir Nelyubin, A. Shahinyan, N. Compton, D. Di, Eliahu Cohen, S. Sooriyaarachchilage, Cynthia Keppel, H. S. Ko, A. Kabir, V. A. Punjabi, D. G. Meekins, S. Barcus, V. Khachatryan, G. B. Franklin, P. Nadel-Turonski, N. Nuruzzaman, Chao Peng, G. R. Smith, H. F. Ibrahim, B. Karki, M. Duer, H. Albataineh, A. Subedi, S. Park, B. Schmookler, B. Pandey, Vincent Sulkosky, J. A. Magee, B. Waidyawansa, and S. Covrig Dusa

Subjects
Quark, Physics, Particle physics, 010308 nuclear & particles physics, Momentum transfer, General Physics and Astronomy, Sigma, Virtual particle, Parton, 01 natural sciences, Helicity, Pion, 0103 physical sciences, High Energy Physics::Experiment, Nuclear Experiment, 010306 general physics, Nucleon
Abstract

We report measurements of the exclusive neutral pion electroproduction cross section off protons at large values of $x_B$ (0.36, 0.48 and 0.60) and $Q^2$ (3.1 to 8.4 GeV$^2$) obtained from Jefferson Lab Hall A experiment E12-06-014. The corresponding structure functions $d\sigma_L/dt+\epsilon d\sigma_T/dt$, $d\sigma_{TT}/dt$, $d\sigma_{LT}/dt$ and $d\sigma_{LT'}/dt$ are extracted as a function of the proton momentum transfer $t-t_{min}$. The results suggest the amplitude for transversely polarized virtual photons continues to dominate the cross-section throughout this kinematic range. The data are well described by calculations based on transversity Generalized Parton Distributions coupled to a helicity flip Distribution Amplitude of the pion, thus providing a unique way to probe the structure of the nucleon.

Published
2021
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4. Accurate Determination of the Neutron Skin Thickness of Pb208 through Parity-Violation in Electron Scattering

Author

S. Rahman, H. Albataineh, B. Yale, K. S. Kumar, S. Seeds, A. Deshpande, C. Ayerbe Gayoso, A. Yoon, Q. Campagna, G. M. Urciuoli, G. Leverick, R. Mammei, Bogdan Wojtsekhowski, D. S. Armstrong, Paul Souder, Siyu Jian, C. Palatchi, S. Johnston, C. Jantzi, H. Bhatt, P. E. Reimer, B. Karki, Dipangkar Dutta, T. Ye, D. King, D. McNulty, M. Knauss, L. G. Tang, J. C. Cornejo, T. Gautam, S. Katugampola, P. M. King, R. W. Radloff, H. Liu, J. O. Hansen, J. Pan, D. C. Jones, Michael Pitt, S. Riordan, E. W. Wertz, S. Park, R. Michaels, Y. Tian, C. Metts, M. N. H. Rashad, P. Datta, S. Premathilake, S. Malace, W. Zhang, S. Covrig Dusa, Y. Roblin, I. Halilovic, K. A. Aniol, T. Averett, S. Barcus, C. Feldman, N. Liyange, B. Pandey, A. Zec, E. Fuchey, Charles Horowitz, Jay Benesch, Michaela Thiel, Kent Paschke, A. Narayan, C. Ghosh, D. Adhikari, Brendan Reed, B. P. Quinn, Jiawen Zhang, F. Hauenstein, Cynthia Keppel, M. Petrusky, Darko Androić, G. D. Cates, D. G. Meekins, R. Richards, V. Bellini, N. Lashley-Colthirst, A. Rathnayake, M. M. Mondal, X. Zheng, Michael Gericke, M. McCaughan, Andrew Puckett, Juliette Mammei, A. Camsonne, A. Shahinyan, B. Blaikie, C. Clarke, D. Gaskell, Y. Chen, Jim Napolitano, V. Owen, C. Gal, D. Nikolaev, D. Bhetuwal, R. S. Beminiwattha, W. Henry, T. Kutz, and D. Bhatta Pathak

Subjects
Elastic scattering, Physics, Equation of state (cosmology), media_common.quotation_subject, Form factor (quantum field theory), General Physics and Astronomy, 01 natural sciences, Asymmetry, 0103 physical sciences, Saturation (graph theory), Neutron, Atomic physics, 010306 general physics, Electron scattering, Energy (signal processing), media_common
Abstract

We report a precision measurement of the parity-violating asymmetry A_{PV} in the elastic scattering of longitudinally polarized electrons from ^{208}Pb. We measure A_{PV}=550±16(stat)±8(syst) parts per billion, leading to an extraction of the neutral weak form factor F_{W}(Q^{2}=0.00616 GeV^{2})=0.368±0.013. Combined with our previous measurement, the extracted neutron skin thickness is R_{n}-R_{p}=0.283±0.071 fm. The result also yields the first significant direct measurement of the interior weak density of ^{208}Pb: ρ_{W}^{0}=-0.0796±0.0036(exp)±0.0013(theo) fm^{-3} leading to the interior baryon density ρ_{b}^{0}=0.1480±0.0036(exp)±0.0013(theo) fm^{-3}. The measurement accurately constrains the density dependence of the symmetry energy of nuclear matter near saturation density, with implications for the size and composition of neutron stars.

Published
2021
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5. Study of the Λ/Σ0 electroproduction in the low-Q2 region at JLab

Author

K. Okuyama, K. Itabashi, S. Nagao, S. N. Nakamura, K. N. Suzuki, T. Gogami, B. Pandey, L. Tang, D. Abrams, T. Akiyama, D. Androic, K. Aniol, C. Ayerbe Gayoso, J. Bane, S. Barcus, J. Barrow, V. Bellini, H. Bhatt, D. Bhetuwal, D. Biswas, A. Camsonne, J. Castellanos, J-P. Chen, J. Chen, S. Covrig, D. Chrisman, R. Cruz-Torres, R. Das, E. Fuchey, K. Gnanvo, F. Garibaldi, T. Gautam, J. Gomez, P. Gueye, T. J. Hague, O. Hansen, W. Henry, F. Hauenstein, D. W. Higinbotham, C. E. Hyde, M. Kaneta, C. Keppel, T. Kutz, N. Lashley-Colthirst, S. Li, H. Liu, J. Mammei, P. Markowitz, R. E. McClellan, F. Meddi, D. Meekins, R. Michaels, M. Mihovilovic, A. Moyer, D. Nguyen, M. Nycz, V. Owen, C. Palatchi, S. Park, T. Petkovic, S. Premathilake, P. E. Reimer, J. Reinhold, S. Riordan, V. Rodriguez, C. Samanta, S. N. Santiesteban, B. Sawatzky, S. Širca, K. Slifer, T. Su, Y. Tian, Y. Toyama, K. Uehara, G. M. Urciuoli, D. Votaw, J. Williamson, B. Wojtsekhowski, S. A. Wood, B. Yale, Z. Ye, J. Zhang, and X. Zheng

Abstract

We performed an experiment using tritium and hydrogen cryogenic gas targets at Thomas Jefferson National Accelerator Facility (JLab) in 2018 (E12-17-003)[1, 2]. In this article, we discuss the Λ/Σ0 hyperon electroproduction from hydrogen target. Elementary Λ/Σ0 hyperon production processes are important not only for an absolute mass scale calibration in our experiment, but also for the study of the electroproduction mechanisms themselves. In this article, we reported the results of the differential cross section for the p(e, e’K+)Λ/Σ0 reaction at Q2 ∼ 0.5 (GeV/c)2.

Published
2022
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6. Cross-section measurement of virtual photoproduction of iso-triplet three-body hypernucleus, Λnn

Author

T. Gogami, K. N. Suzuki, B. Pandey, K. Itabashi, S. Nagao, K. Okuyama, S. N. Nakamura, L. Tang, D. Abrams, T. Akiyama, D. Androic, K. Aniol, C. Ayerbe Gayoso, J. Bane, S. Barcus, J. Barrow, V. Bellini, H. Bhatt, D. Bhetuwal, D. Biswas, A. Camsonne, J. Castellanos, J-P. Chen, J. Chen, S. Covrig, D. Chrisman, R. Cruz-Torres, R. Das, E. Fuchey, K. Gnanvo, F. Garibaldi, T. Gautam, J. Gomez, P. Gueye, T. J. Hague, O. Hansen, W. Henry, F. Hauenstein, D. W. Higinbotham, C. E. Hyde, M. Kaneta, C. Keppel, T. Kutz, N. Lashley-Colthirst, S. Li, H. Liu, J. Mammei, P. Markowitz, R. E. McClellan, F. Meddi, D. Meekins, R. Michaels, M. Mihovilovic, A. Moyer, D. Nguyen, M. Nycz, V. Owen, C. Palatchi, S. Park, T. Petkovic, S. Premathilake, P. E. Reimer, J. Reinhold, S. Riordan, V. Rodriguez, C. Samanta, S. N. Santiesteban, B. Sawatzky, S. Širca, K. Slifer, T. Su, Y. Tian, Y. Toyama, K. Uehara, G. M. Urciuoli, D. Votaw, J. Williamson, B. Wojtsekhowski, S. A. Wood, B. Yale, Z. Ye, J. Zhang, and X. Zheng

Abstract

Missing-mass spectroscopy with the 3H(e, e′K+) reaction was carried out at Jefferson Lab’s (JLab) Hall A in Oct–Nov, 2018. The differential cross section for the 3H(γ∗, K+)Λnn was deduced at ω = Ee − Ee′ = 2.102 GeV and at the forward K+-scattering angle (0° ≤ θγ∗K ≤ 5°) in the laboratory frame. Given typical predicted energies and decay widths, which are (BΛ, Γ) = (−0.25, 0.8) and (−0.55, 4.7) MeV, the cross sections were found to be 11.2 ± 4.8(stat.)+4.1−2.1(sys.) and 18.1 ± 6.8(stat.)+4.2−2.9(sys.) nb/sr, respectively. The obtained result would impose a constraint for interaction models particularly between Λ and neutron by comparing to theoretical calculations.

Published
2022
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7. Study of Λn FSI with Λ quasi-free productions on the 3H(e, e′K+)X reaction at JLab

Author

K. Itabashi, K.N. Suzuki, B. Pandey, K. Okuyama, T. Gogami, S. Nagao, S.N. Nakamura, L. Tang, D. Abrams, T. Akiyama, D. Androic, K. Aniol, C. Ayerbe Gayoso, J. Bane, S. Barcus, J. Barrow, V. Bellini, H. Bhatt, D. Bhetuwal, D. Biswas, A. Camsonne, J. Castellanos, J-P. Chen, J. Chen, S. Covrig, D. Chrisman, R. Cruz-Torres, R. Das, E. Fuchey, K. Gnanvo, F. Garibaldi, T. Gautam, J. Gomez, P. Gueye, T.J. Hague, O. Hansen, W. Henry, F. Hauenstein, D.W. Higinbotham, C.E. Hyde, M. Kaneta, C. Keppel, T. Kutz, N. Lashley-Colthirst, S. Li, H. Liu, J. Mammei, P. Markowitz, R. E. McClellan, F. Meddi, D. Meekins, R. Michaels, M. Mihovilovic, A. Moyer, D. Nguyen, M. Nycz, V. Owen, C. Palatchi, S. Park, T. Petkovic, S. Premathilake, P.E. Reimer, J. Reinhold, S. Riordan, V. Rodriguez, C. Samanta, S.N. Santiesteban, B. Sawatzky, S. Širca, K. Slifer, T. Su, Y. Tian, Y. Toyama, K. Uehara, G.M. Urciuoli, D. Votaw, J. Williamson, B. Wojtsekhowski, S.A. Wood, B. Yale, Z. Ye, J. Zhang, and X. Zheng

Abstract

An nnΛ is a neutral baryon system with no charge. The study of the pure Λ-neutron system such as nnΛ gives us information on the Λn interaction. The nnΛ search experiment (E12-17-003) was performed at JLab Hall A in 2018. In this article, the Λn FSI was investigated by a shape analysis of the 3H(e, e′K+)X missing mass spectrum, and a preliminary result for the Λn FSI study is given.

Published
2022
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8. First Measurement of the $Q^2$ Dependence of the Beam-Normal Single Spin Asymmetry for Elastic Scattering off Carbon

Author

P. Herrmann, Concettina Sfienti, S. Širca, K. Aulenbacher, M. Dehn, B. S. Schlimme, Ivica Friščić, F. E. Maas, J. Müller, J. Beričič, D. Bosnar, S. Štajner, M. Hoek, B. Spruck, U. Müller, Michaela Thiel, Kent Paschke, H. Fonvieille, A. Weber, S. Baunack, S. Kegel, M. O. Distler, J. Pochodzalla, T. Kolar, M. Mihovilovic, V. Tioukine, H. J. Kreidel, Y. Kohl, C. Palatchi, Mikhail Gorchtein, Anselm Esser, A. Tyukin, L. Correa, Patrick Achenbach, M. Schoth, Harald Merkel, S. Heidrich, F. Schulz, F. Nillius, Laboratoire de Physique de Clermont (LPC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne [2017-2020] (UCA [2017-2020])-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)

Subjects
carbon: target, electron: polarized beam, media_common.quotation_subject, General Physics and Astronomy, Electron, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], momentum transfer dependence, 01 natural sciences, Asymmetry, Mainz Linac, 0103 physical sciences, gallium: arsenic, polarization: transverse, elektronsko raspršenje, 010306 general physics, Nuclear Experiment, Spin-½, media_common, Physics, Elastic scattering, form factor: ratio, form factor: charge, exchange: two-photon, 010308 nuclear & particles physics, nucleus: target, izmjena dva fotona, electron nucleus: elastic scattering, Charge (physics), amplitude analysis, NATURAL SCIENCES. Physics, PRIRODNE ZNANOSTI. Fizika, spin: asymmetry: measured, Elektronsko raspršenje, izmjena dva fotona, Amplitude, Cover (topology), High Energy Physics::Experiment, Atomic physics, radiation: laser, Beam (structure), photoelectron, experimental results
Abstract

We report on the first Q^{2}-dependent measurement of the beam-normal single spin asymmetry A_{n} in the elastic scattering of 570 MeV vertically polarized electrons off ^{12}C. We cover the Q^{2} range between 0.02 and 0.05 GeV^{2}/c^{2} and determine A_{n} at four different Q^{2} values. The experimental results are compared to a theoretical calculation that relates A_{n} to the imaginary part of the two-photon exchange amplitude. The result emphasizes that the Q^{2} behavior of A_{n} given by the ratio of the Compton to charge form factors cannot be treated independently of the target nucleus.

Published
2018
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10. R4 PSYCHOLOGICAL DISTRESS

Author

C. Palatchi

Subjects
Distress, Reproductive Medicine, Obstetrics and Gynecology, Psychological distress, Psychology, Developmental Biology, Clinical psychology
Published
2010
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