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Korover, I.; Pybus, J.R.; Hauenstein, F.; Duer, M.; Hen, O.; Weinstein, L.B.; Higinbotham, D.W.; Adhikari, S.; Atac, H.; Barion, L.; Battaglieri, M.; Beck, A.; Bianconi, A.; Biselli, A.S.; Boiarinov, S.; Briscoe, W.J.; Brooks, W.K.; Bulumulla, D.; Burkert, V.D.; Carman, D.S.; Celentano, A.; Clark, L.; Cole, P.L.; Contalbrigo, M.; Cruz-Torres, R.; De Vita, R.; Defurne, M.; Deur, A.; Diehl, S.; Djalali, C.; Dupre, R.; Ehrhart, M.; El Alaoui, A.; El Fassi, L.; Elouadrhiri, L.; Eugenio, P.; Filippi, A.; Forest, T.; Gavalian, G.; Gothe, R.W.; Griffioen, K.A.; Hafidi, K.; Hakobyan, H.; Hattawy, M.; Holtrop, M.; Ilieva, Y.; Jenkins, D.; Jo, H.S.; Joosten, S.; Khachatryan, M.; Khanal, A.; Khandaker, M.; Kim, A.; Kim, C.W.; Klein, F.J.; Kubarovsky, V.; Lanza, L.; Leali, M.; Lenisa, P.; Lucherini, V.; Marchand, D.; Markov, N.; Mascagna, V.; McKinnon, B.; Mirazita, M.; Munoz Camacho, C.; Mustapha, B.; Nadel-Turonski, P.; Neupane, K.; Niculescu, G.; Ostrovidov, A.I.; Pappalardo, L.L.; Paremuzyan, R.; Price, J.W.; Protopopescu, D.; Raue, B.A.; Ripani, M.; Rizzo, A.; Rosner, G.; Sabatié, F.; Salgado, C.; Schumacher, R.A.; Segarra, E.P.; Sharabian, Y.G.; Shrestha, U.; Sokhan, D.; Stepanyan, S.; Strakovsky, I.I.; Strauch, S.; Tan, J.A.; Ungaro, M.; Venturelli, L.; Voskanyan, H.; Wang, T.; Wei, X.; Wood, M.H.; Zachariou, N.; Zhang, J.; Zhao, Z.W.; Zheng, X.
Physics letters. B, 09/2021, Letnik: 820Journal Article
High-momentum configurations of nucleon pairs at short-distance are probed using measurements of the 12C(e,e′p) and 12C(e,e′pN) reactions (where N is either n or p), at high-Q2 and xB>1.1. The data span a missing-momentum range of 300–1000 MeV/c and are predominantly sensitive to the transition region of the strong nuclear interaction from a Tensor to Scalar interaction. The data are well reproduced by theoretical calculations using the Generalized Contact Formalism with both chiral and phenomenological nucleon-nucleon (NN) interaction models. This agreement suggests that the measured high missing-momentum protons up to 1000 MeV/c predominantly belong to short-ranged correlated (SRC) pairs. The measured 12C(e,e′pN) / 12C(e,e′p) and 12C(e,e′pp) / 12C(e,e′pn) cross-section ratios are consistent with a decrease in the fraction of proton-neutron SRC pairs and increase in the fraction of proton-proton SRC pairs with increasing missing momentum. This confirms the transition from an isospin-dependent tensor NN interaction at ∼400 MeV/c to an isospin-independent scalar interaction at high-momentum around ∼800 MeV/c as predicted by theoretical calculation.
