Probing the Repulsive Core of the Nucleon-Nucleon Interaction via the 4He(e,e'pN) Triple-Coincidence Reaction
Creators: name: Muangma, I. Korover N.
name: Hen, O.
name: Shneor, R.
name: Sulkosky, V.
name: Kelleher, A.
name: Gilad, S.
name: Higinbotham, D. W.
name: Watson, E. Piasetzky J.
name: Wood, S.
name: Rakhman, Abdurahim
name: Aguilera, P.
name: Ahmed, Z.
name: Albataineh, H.
name: Allada, K.
name: Anderson, B.
name: Anez, D.
name: Aniol, K.
name: Annand, J.
name: Armstrong, W.
name: Arrington, J.
name: Averett, T.
name: Badman, T.
name: Baghdasaryan, H.
name: Bai, X.
name: Beck, A.
name: Beck, S.
name: Bellini, V.
name: Benmokhtar, F.
name: Bertozzi, W.
name: Bittner, J.
name: Boeglin, W.
name: Camsonne, A.
name: Chen, C.
name: Chen, J. -P.
name: Chirapatpimol, K.
name: Cisbani, E.
name: Dalton, M. M.
name: Daniel, A.
name: Day, D.
name: de Jager, C. W.
name: De Leo, R.
name: Deconinck, W.
name: Defurne, M.
name: Flay, D.
name: Fomin, N.
name: Friend, M.
name: Frullani, S.
name: Fuchey, E.
name: Garibaldi, F.
name: Gaskell, D.
name: Gilman, R.
name: Glamazdin, O.
name: Gu, C.
name: Gueye, P.
name: Hamilton, D.
name: Hanretty, C.
name: Hansen, O.
name: Shabestari, M. Hashemi
name: Holmstrom, T.
name: Huang, M.
name: Iqbal, S.
name: Jin, G.
name: Kalantarians, N.
name: Kang, H.
name: Khandaker, M.
name: LeRose, J.
name: Leckey, J.
name: Lindgren, R.
name: Long, E.
name: Mammei, J.
name: Margaziotis, D. J.
name: Markowitz, P.
name: Jimenez-Arguello, A. Marti
name: Meekins, D.
name: Meziani, Z.
name: Michaels, R.
name: Mihovilovic, M.
name: Monaghan, P.
name: Camacho, C. Munoz
name: Norum, B.
name: Nuruzzaman
name: Pan, K.
name: Phillips, S.
name: Pomerantz, I.
name: Posik, M.
name: Punjabi, V.
name: Qian, X.
name: Qiang, Y.
name: Qiu, X.
name: Reimer, P. E.
name: Riordan, S.
name: Ron, G.
name: Rondon-Aramayo, O.
name: Saha, A.
name: Schulte, E.
name: Selvy, L.
name: Shahinyan, A.
name: Sirca, S.
name: Sjoegren, J.
name: Slifer, K.
name: Solvignon, P.
name: Sparveris, N.
name: Subedi, R.
name: Tireman, W.
name: Wang, D.
name: Weinstein, L. B.
name: Wojtsekhowski, B.
name: Yan, W.
name: Yaron, I.
name: Ye, Z.
name: Zhan, X.
name: Zhang, J.
name: Zhang, Y.
name: Zhao, B.
name: Zhao, Z.
name: Zheng, X.
name: Zhu, P.
name: Zielinski, R.
Publisher: name: arXiv
Year: 2014
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We studied simultaneously the 4He(e,e'p), 4He(e,e'pp), and 4He(e,e'pn) reactions at Q^2=2 [GeV/c]2 and x_B&gt;1, for a (e,e'p) missing-momentum range of 400 to 830 MeV/c. The knocked-out proton was detected in coincidence with a proton or neutron recoiling almost back to back to the missing momentum, leaving the residual A=2 system at low excitation energy. These data were used to identify two-nucleon short-range correlated pairs and to deduce their isospin structure as a function of missing momentum in a region where the nucleon-nucleon force is expected to change from predominantly tensor to repulsive. Neutron-proton pairs dominate the high-momentum tail of the nucleon momentum distributions, but their abundance is reduced as the nucleon momentum increases beyond ~500 MeV/c. The extracted fraction of proton-proton pairs is small and almost independent of the missing momentum in the range we studied. Our data are compared with ab-initio calculations of two-nucleon momentum distributions in 4He.
description: 6 pages, 2 figures