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Asymmetric Neutrino Production in Strongly Magnetized Proto-Neutron Stars

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arxiv 1405.7123 v1 pith:O53XHBV7 submitted 2014-05-28 nucl-th

Asymmetric Neutrino Production in Strongly Magnetized Proto-Neutron Stars

classification nucl-th
keywords neutrinoproductionfieldfluxmagneticprocessdirectionproto-neutron
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We calculate the neutrino production cross-section through the direct URCA process in proto-neutron star matter in the presence of a strong magnetic field. We assume isoentropic conditions and introduce a new equation of state parameter-set in the relativistic mean-field approach that can reproduce neutron stars with $M > 1.96$ M$_\odot$ as required by observations. We find that the production process increases the flux of emitted neutrinos along the direction parallel to the magnetic field and decreases the flux in the opposite direction. This means that the neutrino flux asymmetry due to the neutrino absorption and scattering processes in a magnetic field becomes larger by the inclusion of the neutrino production process.

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