Probing the Repulsive Core of the Nucleon-Nucleon Interaction via theHe4(e,e′pN)Triple-Coincidence Reaction Academic Article uri icon

  •  
  • Overview
  •  
  • Research
  •  
  • Identity
  •  
  • Additional Document Info
  •  
  • View All
  •  

abstract

  • We studied simultaneously the (4)He(e,e'p), (4)He(e,e'pp), and (4)He(e,e'pn) reactions at Q(2)=2(GeV/c)(2) and x(B)>1, for an (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 (NN) force is expected to change from predominantly tensor to repulsive. The abundance of neutron-proton pairs 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. Our data are compared with calculations of two-nucleon momentum distributions in (4)He and discussed in the context of probing the elusive repulsive component of the NN force.

authors

  • Korover, I
  • Muangma, N
  • Hen, O
  • Shneor, R
  • Sulkosky, V
  • Kelleher, A
  • Gilad, S
  • Higinbotham, DW
  • Piasetzky, E
  • Watson, JW
  • Wood, SA
  • Aguilera, P
  • Ahmed, Z
  • Albataineh, H
  • Allada, K
  • Anderson, B
  • Anez, D
  • Aniol, K
  • Annand, J
  • Armstrong, W
  • Arrington, J
  • Averett, T
  • Badman, T
  • Baghdasaryan, H
  • Bai, X
  • Beck, A
  • Beck, S
  • Bellini, V
  • Benmokhtar, F
  • Bertozzi, W
  • Bittner, J
  • Boeglin, W
  • Camsonne, A
  • Chen, C
  • Chen, J-P
  • Chirapatpimol, K
  • Cisbani, E
  • Dalton, MM
  • Daniel, A
  • Day, D
  • de Jager, CW
  • De Leo, R
  • Deconinck, W
  • Defurne, M
  • Flay, D
  • Fomin, N
  • Friend, M
  • Frullani, S
  • Fuchey, E
  • Garibaldi, F
  • Gaskell, D
  • Gilman, R
  • Glamazdin, O
  • Gu, C
  • Gueye, P
  • Hamilton, D
  • Hanretty, C
  • Hansen, J-O
  • Hashemi Shabestari, M
  • Holmstrom, T
  • Huang, M
  • Iqbal, S
  • Jin, G
  • Kalantarians, N
  • Kang, H
  • Khandaker, M
  • LeRose, J
  • Leckey, J
  • Lindgren, R
  • Long, E
  • Mammei, J
  • Margaziotis, DJ
  • Markowitz, P
  • Marti Jimenez-Arguello, A
  • Meekins, D
  • Meziani, Z
  • Michaels, R
  • Mihovilovic, M
  • Monaghan, P
  • Munoz Camacho, C
  • Norum, B
  • Nuruzzaman
  • Pan, K
  • Phillips, S
  • Pomerantz, I
  • Posik, M
  • Punjabi, V
  • Qian, X
  • Qiang, Y
  • Qiu, X
  • Rakhman, A
  • Reimer, PE
  • Riordan, S
  • Ron, G
  • Rondon-Aramayo, O
  • Saha, A
  • Schulte, E
  • Selvy, L
  • Shahinyan, A
  • Sirca, S
  • Sjoegren, J
  • Slifer, K
  • Solvignon, P
  • Sparveris, N
  • Subedi, R
  • Tireman, W
  • Wang, D
  • Weinstein, LB
  • Wojtsekhowski, B
  • Yan, W
  • Yaron, I
  • Ye, Z
  • Zhan, X
  • Zhang, J
  • Zhang, Y
  • Zhao, Benzhong
  • Zhao, Z
  • Zheng, X
  • Zhu, P
  • Zielinski, R

publication date

  • July 11, 2014