Tensor Forces and the Ground-State Structure of Nuclei

R. Schiavilla, R. B. Wiringa, Steven C. Pieper, and J. Carlson
Phys. Rev. Lett. 98, 132501 – Published 27 March 2007

Abstract

Two-nucleon momentum distributions are calculated for the ground states of nuclei with mass number A8, using variational Monte Carlo wave functions derived from a realistic Hamiltonian with two- and three-nucleon potentials. The momentum distribution of np pairs is found to be much larger than that of pp pairs for values of the relative momentum in the range (300600)MeV/c and vanishing total momentum. This order of magnitude difference is seen in all nuclei considered and has a universal character originating from the tensor components present in any realistic nucleon-nucleon potential. The correlations induced by the tensor force strongly influence the structure of np pairs, which are predominantly in deuteronlike states, while they are ineffective for pp pairs, which are mostly in S01 states. These features should be easily observable in two-nucleon knockout processes, such as A(e,enp) and A(e,epp).

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  • Received 10 November 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.132501

©2007 American Physical Society

Authors & Affiliations

R. Schiavilla1,2, R. B. Wiringa3, Steven C. Pieper3, and J. Carlson4

  • 1Jefferson Laboratory, Newport News, Virginia 23606, USA
  • 2Department of Physics, Old Dominion University, Norfolk, Virginia 23529, USA
  • 3Physics Division, Argonne National Laboratory, Argonne, Illinois 61801, USA
  • 4Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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Issue

Vol. 98, Iss. 13 — 30 March 2007

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