Pairing in high-density neutron matter including short- and long-range correlations

ORAL

Abstract

To address open questions in neutron star phenomenology, pairing gaps of $^1S_0$ and $^3P_2-^3F_2$ channels in a wide range of densities has been calculated using three different interactions (AV18 CDbonn N3LO). Traditionally, the Bardeen-Cooper-Schrieffer(BCS) approach has been used to compute gaps from bare nucleon-nucleon interactions. Here, we incorporate the influence of short- and long-range correlations in the pairing gaps. Short-range correlations (SRC) are treated including the appropriate fragmentation of single-particle states, and they suppress the gaps substantially. Long-range correlations(LRC) dress the pairing interaction via density and spin modes, and provide a relatively small correction. Results are relevant and parametrized in a user friendly way for neutron-star cooling scenarios, in particular in view of the recent observational data on Cassiopeia A.

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Authors

  • Dong Ding

    • Department of Physics, Washington University, St. Louis, Missouri 63130, USA

  • Arnau Rios

    • Department of Physics, Faculty of Engineering and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom

  • Helber Dussan

    • Department of Physics, Washington University, St. Louis, Missouri 63130, USA

  • Willem Dickhoff

    • Department of Physics, Washington University, St. Louis, Missouri 63130, USA

  • Sam Witte

    • Department of Physics, Washington University, St. Louis, Missouri 63130, USA

  • Artur Polls

    • Departament d'Estructura i Constituents de la Mat{\`e}ria and Institut de Ci{\`e}nces del Cosmos, Universitat de Barcelona, Avinguda Diagonal 647, E-8