Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields

The neutrino mean free path in neutron matter under a strong magnetic field is evaluated for the inelastic scattering reaction and studied as a function of the neutron matter density in the range 0.05 ≤ ρ ≤ 0.4 fm − 3 for several temperatures up to 30 MeV and magnetic field strengths from B = 0 up t...

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Autores principales: Torres Patiño, Julio César, Bauer, Eduardo, Vidaña, Isaac
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2019
Materias:
Física
Ciencias Astronómicas
Physics
Inelastic scattering
Fermi's golden rule
Neutron
Mean free path
Atomic physics
Neutrino
Scattering
Asymmetry
Spin-½
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/124177
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-124177
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Ciencias Astronómicas
Physics
Inelastic scattering
Fermi's golden rule
Neutron
Mean free path
Atomic physics
Neutrino
Scattering
Asymmetry
Spin-½
spellingShingle Física
Ciencias Astronómicas
Physics
Inelastic scattering
Fermi's golden rule
Neutron
Mean free path
Atomic physics
Neutrino
Scattering
Asymmetry
Spin-½
Torres Patiño, Julio César
Bauer, Eduardo
Vidaña, Isaac
Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
topic_facet Física
Ciencias Astronómicas
Physics
Inelastic scattering
Fermi's golden rule
Neutron
Mean free path
Atomic physics
Neutrino
Scattering
Asymmetry
Spin-½
description The neutrino mean free path in neutron matter under a strong magnetic field is evaluated for the inelastic scattering reaction and studied as a function of the neutron matter density in the range 0.05 ≤ ρ ≤ 0.4 fm − 3 for several temperatures up to 30 MeV and magnetic field strengths from B = 0 up to B = 10 18 G . Polarized neutron matter is described within the nonrelativistic Brueckner–Hartree-Fock (BHF) approach using the Argonne V18 nucleon-nucleon potential supplemented with the Urbana IX three-nucleon force. The LNS Skyrme interaction is also used to describe polarized neutron matter in the Hartree-Fock approximation. Explicit expressions of the cross section per unit volume for the scattering of a neutrino with a spin up or spin down neutron are derived from the Fermi golden rule. Our results show that the mean free path depends strongly on the angle of the incoming neutrino, leading to an asymmetry in this quantity. This asymmetry depends on the magnetic field intensity and on the density, but it is rather independent of the temperature. For a density of 0.15 fm − 3 at a temperature T = 15 MeV , the asymmetry in the mean free path is found to be, for both models, ≈ 0.2 % and ≈ 2 % for B = 10 16 and B = 10 17 G , respectively, and ≈ 15 % ( ≈ 26 % ) for the BHF (Skyrme) model for B = 10 18 G .
format Articulo
Preprint
author Torres Patiño, Julio César
Bauer, Eduardo
Vidaña, Isaac
author_facet Torres Patiño, Julio César
Bauer, Eduardo
Vidaña, Isaac
author_sort Torres Patiño, Julio César
title Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
title_short Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
title_full Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
title_fullStr Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
title_full_unstemmed Asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
title_sort asymmetry of the neutrino mean free path in hot neutron matter under strong magnetic fields
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/124177
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AT bauereduardo asymmetryoftheneutrinomeanfreepathinhotneutronmatterunderstrongmagneticfields
AT vidanaisaac asymmetryoftheneutrinomeanfreepathinhotneutronmatterunderstrongmagneticfields
bdutipo_str Repositorios
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