Chiral effective field theory calculations of neutrino processes in dense matter
Abstract
We calculate neutrino processes involving two nucleons at subnuclear densities using chiral effective field theory. Shorter-range noncentral forces reduce the neutrino rates significantly compared with the one-pion exchange approximation currently used in supernova simulations. For densities rho < 10^{14} g cm^{-3}, we find that neutrino rates are well constrained by nuclear interactions and nucleon-nucleon scattering data. As an application, we calculate the mean-square energy transfer in scattering of a neutrino from nucleons and find that collision processes and spin-dependent mean-field effects dominate over the energy transfer due to nucleon recoil.
Keywords
Cite
@article{arxiv.0812.0102,
title = {Chiral effective field theory calculations of neutrino processes in dense matter},
author = {S. Bacca and K. Hally and C. J. Pethick and A. Schwenk},
journal= {arXiv preprint arXiv:0812.0102},
year = {2009}
}
Comments
5 pages, 3 figures; NORDITA-2008-57; minor changes and additions, added results for the energy transfer in neutrino scattering, to appear as Rapid. Comm. in Phys. Rev. C