Probing the repulsive core of the nucleon-nucleon interaction via the He 4 (e,e′pN) triple-coincidence reaction
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Journal ArticleDate
2014-07-09Author
Korover, IMuangma, 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, JP
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, JO
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
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http://hdl.handle.net/20.500.12613/5873
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10.1103/PhysRevLett.113.022501Abstract
We studied simultaneously the He4(e,e′p), He4(e,e′pp), and He4(e,e′pn) reactions at Q2=2(GeV/c)2 and xB>1, for an (e,e′p) missing-momentum range of 400 to 830MeV/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 ∼500MeV/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 He4 and discussed in the context of probing the elusive repulsive component of the NN force. © 2014 American Physical Society.Citation to related work
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http://dx.doi.org/10.34944/dspace/5855