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Title: Pairing in bulk nuclear matter beyond BCS

The influence of short-range correlations on the spectral distribution of neutrons is incorporated in the solution of the gap equation for the {sup 3}P{sub 2}−{sup 3}F{sub 2} coupled channel in pure neutron matter. This effect is studied for different realistic interactions including one based on chiral perturbation theory. The gap in this channel vanishes at all relevant densities due to the treatment of these correlations. We also consider the effect of long-range correlations by including polarization terms in addition to the bare interaction which allow the neutrons to exchange density and spin fluctuations governed by the strength of Landau parameters allowed to have reasonable values consistent with the available literature. Preliminary results indicate that reasonable values of these parameters do not generate a gap in the {sup 3}P{sub 2}−{sup 3}F{sub 2} coupled channel either for all three realistic interactions although the pairing interaction becomes slightly more attractive.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics, Washington University, St. Louis, Missouri 63130 (United States)
  2. Department of Physics, Washington University, St. Louis, Missouri 63130, USA and Department of Physics and Astronomy, University of California, Los Angeles, CA 90095 (United States)
  3. Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)
  4. Departament d'Estructura i Constituents de la Matèria, Universitat de Barcelona, E-08028 Barcelona (Spain)
Publication Date:
OSTI Identifier:
22307994
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1619; Journal Issue: 1; Conference: 4. conference on nuclei and mesoscopic physics 2014, East Lansing, MI (United States), 5-9 May 2014; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHIRALITY; CORRELATIONS; COUPLED CHANNEL THEORY; ENERGY GAP; FLUCTUATIONS; MATHEMATICAL SOLUTIONS; NEUTRONS; NUCLEAR MATTER; NUCLEAR STRUCTURE; PAIRING INTERACTIONS; PERTURBATION THEORY; POLARIZATION; SPIN