Direct Observation of Proton-Neutron Short-Range Correlation Dominance in Heavy Nuclei
- Duer, M.
- Schmidt, A.
- Pybus, J. R.
- Segarra, E. P.
- Hrnjic, A.
- Denniston, A. W.
- Weiss, R.
- Hen, O.
- Piasetzky, E.
- Weinstein, L. B.
- Barnea, N.
- Korover, I.
- Cohen, E. O.
- Hakobyan, H.
- Adhikari, S.
- Angelini, G.
- Battaglieri, M.
- Beck, A.
- Bedlinskiy, I.
- Biselli, A. S.
- Boiarinov, S.
- Brooks, W.
- Burkert, V. D.
- Cao, F.
- Carman, D. S.
- Celentano, A.
- Chetry, T.
- Ciullo, G.
- Clark, L.
- Cole, P. L.
- Contalbrigo, M.
- Cortes, O.
- Crede, V.
- Cruz Torres, R.
- D'Angelo, A.
- Dashyan, N.
- De Sanctis, E.
- De Vita, R.
- Deur, A.
- Diehl, S.
- Djalali, C.
- Dupre, R.
- Duran, B.
- Egiyan, H.
- El Alaoui, A.
- El Fassi, L.
- Eugenio, P.
- Filippi, A.
- Forest, T. A.
- Gilfoyle, G. P.
- Giovanetti, K. L.
- Girod, F. X.
- Golovatch, E.
- Gothe, R. W.
- Griffioen, K. A.
- Guo, L.
- Hafidi, K.
- Hanretty, C.
- Harrison, N.
- Hattawy, M.
- Hauenstein, F.
- Hayward, T. B.
- Heddle, D.
- Hicks, K.
- Holtrop, M.
- Ilieva, Y.
- Ireland, D. G.
- Ishkhanov, B. S.
- Isupov, E. L.
- Jo, H. S.
- Joo, K.
- Kabir, M. L.
- Keller, D.
- Khachatryan, M.
- Khanal, A.
- Khandaker, M.
- Kim, W.
- Klein, F. J.
- Kubarovsky, V.
- Kuhn, S. E.
- Lanza, L.
- Laskaris, G.
- Lenisa, P.
- Livingston, K.
- Macgregor, I. J. D.
- Marchand, D.
- Markov, N.
- Mckinnon, B.
- Mey-Tal Beck, S.
- Mirazita, M.
- Mokeev, V.
- Montgomery, R. A.
- Movsisyan, A.
- Munoz Camacho, C.
- Mustapha, B.
- Nadel-Turonski, P.
- Niccolai, S.
- Niculescu, G.
- Osipenko, M.
- Ostrovidov, A. I.
- Paolone, M.
- Paremuzyan, R.
- Park, K.
- Pasyuk, E.
- Patsyuk, M.
- Phelps, W.
- Pogorelko, O.
- Prok, Y.
- Protopopescu, D.
- Ripani, M.
- Rizzo, A.
- Rosner, G.
- Rossi, P.
- Sabatie, F.
- Schmookler, B. A.
- Schumacher, R. A.
- Sharabian, Y.
- Skorodumina, I.
- Sokhan, D.
- Sparveris, N.
- Stepanyan, S.
- Strauch, S.
- Taiuti, M.
- Tan, J. A.
- Tyler, N.
- Ungaro, M.
- Voskanyan, H.
- Voutier, E.
- Wang, R.
- Wei, X.
- Wood, M. H.
- Zachariou, N.
- Zhang, J.
- Zhao, Z. W.
- Zheng, X.
DOIAbstract
We measured the triple coincidence A(e,e′np) and A(e,e′pp) reactions on carbon, aluminum, iron, and lead targets at Q2>1.5 (GeV/c)2, xB>1.1 and missing momentum >400 MeV/c. This was the first direct measurement of both proton-proton (pp) and neutron-proton (np) short-range correlated (SRC) pair knockout from heavy asymmetric nuclei. For all measured nuclei, the average proton-proton (pp) to neutron-proton (np) reduced cross-section ratio is about 6%, in agreement with previous indirect measurements. Correcting for single-charge exchange effects decreased the SRC pairs ratio to ∼3%, which is lower than previous results. Comparisons to theoretical generalized contact formalism (GCF) cross-section calculations show good agreement usin...
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