Gap-bridging enhancement of modified Urca processes in nuclear matter

Abstract

In nuclear matter at neutron-star densities and temperatures, Cooper pairing leads to the formation of a gap in the nucleon excitation spectra resulting in exponentially strong Boltzmann suppression of many transport coefficients. Previous calculations have shown evidence that density oscillations of sufficiently large amplitude can overcome this suppression for flavor-changing $\beta$ processes, via the mechanism of "gap bridging". We address the simplifications made in that initial work, and show that gap bridging can counteract Boltzmann suppression of neutrino emissivity for the realistic case of modified Urca processes in matter with ${}^3{P}_2$ neutron pairing.

arXiv comment8 pages, 9 figures. Additional references and corrections from proof-reading implemented

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Cited by in corpus (4)

• On the importance of viscous dissipation and heat conduction in binary neutron-star mergers
• Superfluidity in nuclear systems and neutron stars
• Magnetars and Axion-like Particles: Probes with the Hard X-ray Spectrum
• Nonlinear approach to the entrainment matrix of superfluid nucleon mixture at zero temperature