Vertex renormalization of weak interactions in compact stars: beyond leading order
Abstract
Neutrino emission rate from baryonic matter in neutron stars via weak neutral vector interaction is computed up to order O(vF6), where vF is the Fermi velocity in units of speed of light. The vector current polarization tensors are evaluated with full vertices which include resummed series in the particle-hole channel. The neutrino emissivity is enhanced compared to the O(vF4) order up of 10% for values vF< 0.4 characteristic to baryons in compact stars.
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