Nuclear pairing from chiral pion-nucleon dynamics

2004/11/10 by N. Kaiser, T. Nikšić, T. Niksic +1
Physics and Astronomy · #Cutoff #Dynamics (music) #Mixing (physics) #Nuclear physics research studies #Order (exchange) #Pairing #Pulsars and Gravitational Waves Research #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1140/epja/i2005-10122-3

published as Eur.Phys.J. A25 (2005) 257-261 · 9 pages, 3 eps figures, submitted to PRC

arxiv created 2004/11/10 · openalex publication_date 2005/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We use a recently improved version of the chiral nucleon-nucleon potential at next-to-next-to-leading order to calculate the ¹S₀ pairing gap in isospin-symmetric nuclear matter. The pairing potential consists of the long-range one- and two-pion exchange terms and two short-distance NN-contact couplings. We find that the inclusion of the two-pion exchange at next-to-next-to-leading order reduces substantially the cut-off dependence of the ¹S₀ pairing gap determined by solving a regularised BCS equation. Our results are close to those obtained with the universal low-momentum nucleon-nucleon potential V_{\rm low-k} or the phenomenological Gogny D1S force.

Citations

• Improving the convergence of the chiral expansion for nuclear forces - II: Low phases and the deuteron
• Self-consistent mean-field models for nuclear structure
• Screening of nuclear pairing in nuclear and neutron matter

Cited by

• Dependence of the BCS 1S0 superfluid pairing gap on nuclear interactions