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Electroweak interactions in a relativistic Fermi gas

K. Vantournhout·N. Jachowicz·J. Ryckebusch
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Abstract

We present a relativistic model for computing the neutrino mean free path in neutron matter. Thereby, neutron matter is described as a non-interacting Fermi gas in beta-equilibrium. We present results for the neutrino mean free path for temperatures from 0 up to 50 MeV and a broad range of neutrino energies. We show that relativistic effects cause a considerable enhancement of neutrino-scattering cross-sections in neutron matter. The influence of the $Q^2$-dependence in the electroweak form factors and the inclusion of a weak magnetic term in the hadron current is discussed. The weak-magnetic term in the hadron current is at the origin of some selective spin dependence for the nucleons which are subject to neutrino interactions.

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K. Vantournhout, N. Jachowicz, J. Ryckebusch. 2006-08-16. Electroweak interactions in a relativistic Fermi gas. https://doi.org/10.1103/physrevc.74.035501

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