Pairing Properties of Symmetric Nuclear Matter in Relativistic Mean Field Theory

TL;DR

This paper investigates pairing correlations in symmetric nuclear matter using relativistic mean field theory, introducing an effective factor to align pairing gap results with those from Gogny force calculations.

Contribution

It proposes an effective factor in RMF calculations to correct the pairing gap size, achieving consistency with Gogny force results.

Findings

Effective factor of 0.76 yields a pairing gap of 3.2 MeV.

Maximum pairing gap occurs at Fermi momentum 0.9 fm$^{-1}$.

Results align with Gogny force calculations.

Abstract

The properties of pairing correlations in symmetric nuclear matter are studied in the relativistic mean field (RMF) theory with the effective interaction PK1. Considering well-known problem that the pairing gap at Fermi surface calculated with RMF effective interactions are three times larger than that with Gogny force, an effective factor in the particle-particle channel is introduced. For the RMF calculation with PK1, an effective factor 0.76 give a maximum pairing gap 3.2 MeV at Fermi momentum 0.9 fm$^{-1}$, which are consistent with the result with Gogny force.