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Momentum sharing in imbalanced Fermi systems

  • O. Hen
  • , M. Sargsian
  • , L. B. Weinstein
  • , E. Piasetzky
  • , H. Hakobyan
  • , D. W. Higinbotham
  • , M. Braverman
  • , W. K. Brooks
  • , S. Gilad
  • , K. P. Adhikari
  • , J. Arrington
  • , G. Asryan
  • , H. Avakian
  • , J. Ball
  • , N. A. Baltzell
  • , M. Battaglieri
  • , A. Beck
  • , S. May-Tal Beck
  • , I. Bedlinskiy
  • , W. Bertozzi
  • A. Biselli, V. D. Burkert, T. Cao, D. S. Carman, A. Celentano, S. Chandavar, L. Colaneri, P. L. Cole, V. Crede, A. D'Angelo, R. De Vita, A. Deur, C. Djalali, D. Doughty, M. Dugger, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, L. Elouadrhiri, G. Fedotov, S. Fegan, T. Forest, B. Garillon, M. Garcon, N. Gevorgyan, Y. Ghandilyan, G. P. Gilfoyle, F. X. Girod, J. T. Goetz, R. W. Gothe, K. A. Griffioen, M. Guidal, L. Guo, K. Hafidi, C. Hanretty, M. Hattawy, K. Hicks, M. Holtrop, C. E. Hyde, Y. Ilieva, D. G. Ireland, B. I. Ishkanov, E. L. Isupov, H. Jiang, H. S. Jo, K. Joo, D. Keller, M. Khandaker, A. Kim, W. Kim, F. J. Klein, S. Koirala, I. Korover, S. E. Kuhn, V. Kubarovsky, P. Lenisa, W. I. Levine, K. Livingston, M. Lowry, H. Y. Lu, I. J.D. MacGregor, N. Markov, M. Mayer, B. McKinnon, T. Mineeva, V. Mokeev, A. Movsisyan, C. Munoz Camacho, B. Mustapha, P. Nadel-Turonski, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, L. L. Pappalardo, R. Paremuzyan, K. Park, E. Pasyuk, W. Phelps, S. Pisano, O. Pogorelko, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, A. J.R. Puckett, D. Rimal, M. Ripani, B. G. Ritchie, A. Rizzo, G. Rosner, P. Roy, P. Rossi, F. Sabatié, D. Schott, R. A. Schumacher, Y. G. Sharabian, G. D. Smith, R. Shneor, D. Sokhan, S. S. Stepanyan, S. Stepanyan, P. Stoler, S. Strauch, V. Sytnik, M. Taiuti, S. Tkachenko, M. Ungaro, A. V. Vlassov, E. Voutier, N. K. Walford, X. Wei, M. H. Wood, S. A. Wood, N. Zachariou, L. Zana, Z. W. Zhao, X. Zheng, I. Zonta
  • Tel Aviv University
  • Florida International University
  • Old Dominion University
  • Universidad Técnica Federico Santa Maria
  • A. Alikhanian Yerevan Institute of Physics
  • Thomas Jefferson National Accelerator Facility
  • Massachusetts Institute of Technology
  • Argonne National Laboratory
  • CEA Saclay
  • National Institute for Nuclear Physics
  • Nuclear Research Center-Negev
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Fairfield University
  • University of South Carolina
  • Ohio University
  • Idaho State University
  • Catholic University of America
  • Florida State University
  • University of Rome Tor Vergata
  • University of Iowa
  • Christopher Newport University
  • Arizona State University
  • Institut de Physique Nucléaire Orsay
  • Lomonosov Moscow State University
  • University of Richmond
  • College of William and Mary
  • University of Virginia
  • University of New Hampshire
  • George Washington University
  • University of Glasgow
  • University of Connecticut
  • Norfolk State University
  • Kyungpook National University
  • Carnegie Mellon University
  • James Madison University
  • University of Ferrara
  • California State University Dominguez Hills
  • University of Edinburgh
  • Rensselaer Polytechnic Institute
  • University of Genoa
  • Université Joseph Fourier Grenoble 1
  • Canisius College

Research output: Contribution to journalArticlepeer-review

279 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)614-617
Number of pages4
JournalScience
Volume346
Issue number6209
DOIs
StatePublished - 31 Oct 2014

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