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  • Momentum sharing in imbalan...
    Hen, O.; Sargsian, M.; Weinstein, L. B.; Piasetzky, E.; Hakobyan, H.; Higinbotham, D. W.; Braverman, M.; Brooks, W. K.; Gilad, S.; Adhikari, K. P.; Asryan, G.; Avakian, H.; Ball, J.; Baltzell, N. A.; Beck, A.; Beck, S. May-Tal; Bedlinskiy, I.; Bertozzi, W.; Biselli, A.; Cao, T.; Carman, D. S.; Celentano, A.; Chandavar, S.; Colaneri, L.; D’Angelo, A.; De Vita, R.; Deur, A.; Djalali, C.; Doughty, D.; Dugger, M.; Dupre, R.; Egiyan, H.; Alaoui, A. El; Fassi, L. El; Forest, T.; Garillon, B.; Garcon, M.; Gevorgyan, N.; Gilfoyle, G. P.; Girod, F. X.; Griffioen, K. A.; Guidal, M.; Hafidi, K.; Hicks, K.; Holtrop, M.; Hyde, C. E.; Ishkanov, B. I.; Isupov, E. L.; Jiang, H.; Jo, H. S.; Joo, K.; Keller, D.; Khandaker, M.; Kim, A.; Klein, F. J.; Koirala, S.; Kuhn, S. E.; Kubarovsky, V.; Livingston, K.; Lowry, M.; Lu, H. Y.; Markov, N.; Mayer, M.; McKinnon, B.; Mokeev, V.; Movsisyan, A.; Camacho, C. Munoz; Niculescu, G.; Niculescu, I.; Osipenko, M.; Paremuzyan, R.; Park, K.; Phelps, W.; Pisano, S.; Pogorelko, O.; Price, J. W.; Prok, Y.; Protopopescu, D.; Puckett, A. J. R.; Rimal, D.; Ripani, M.; Ritchie, B. G.; Rosner, G.; Roy, P.; Rossi, P.; Sabatié, F.; Shneor, R.; Sokhan, D.; Stepanyan, S.; Strauch, S.; Sytnik, V.; Taiuti, M.; Ungaro, M.; Vlassov, A. V.; Voutier, E.; Walford, N. K.; Wood, M. H.; Wood, S. A.; Zachariou, N.; Zana, L.

    Science (American Association for the Advancement of Science), 10/2014, Letnik: 346, Številka: 6209
    Journal Article

    The atomic nucleus is composed of two different kinds of fermions: protons and neutrons. If the protons and neutrons did not interact, the Pauli exclusion principle would force the majority of fermions (usually neutrons) to have a higher average momentum. Our high-energy electron-scattering measurements using 12C, 27Al, 56Fe, and 208Pb targets show that even in heavy, neutron-rich nuclei, short-range interactions between the fermions form correlated high-momentum neutron-proton pairs. Thus, in neutron-rich nuclei, protons have a greater probability than neutrons to have momentum greater than the Fermi momentum. This finding has implications ranging from nuclear few-body systems to neutron stars and may also be observable experimentally in two-spin–state, ultracold atomic gas systems.