Neutrino emission from spin waves in neutron spin-triplet superfluid

Abstract

The linear response of a neutron spin-triplet superfluid onto external weak axial-vector field is studied for the case of ${}^3{P}_2$ pairing with a projection of the total angular momentum $m_j=0$. The problem is considered in the BCS approximation discarding Fermi-liquid effects. The anomalous axial-vector vertices of neutron quasiparticles possess singularities at some frequencies which specify existence of undamped spin-density waves in the Cooper condensate. The spin waves are of a low excitation energy and are kinematically able to decay into neutrino pairs through neutral weak currents. We evaluate the neutrino emissivity from the spin wave decays in the bulk neutron superfluid in old neutron stars. This calculation predicts significant energy losses from within a neutron star at lowest temperatures when all other mechanisms of neutrino emission are killed by the neutron and proton superfluidity.

14 pages, 4 figures

References in corpus (3)

• Neutrino Emission from Cooper Pairs and Minimal Cooling of Neutron Stars
• Neutrino emission from triplet pairing of neutrons in neutron stars
• Superfluid response and the neutrino emissivity of baryon matter: Fermi-liquid effects

Cited by in corpus (22)

• Magnetic Properties of Quantized Vortices in Neutron ${}^3{P}_2$ Superfluids in Neutron Stars
• Collective modes of the order parameter in a triplet superfluid neutron liquid
• Reexamining Ginzburg-Landau theory for neutron ${}^3{P}_2$ superfluidity in neutron stars
• Zero sound in triplet-correlated superfluid neutron matter
• Neutrino emissivity of anisotropic neutron superfluids
• Neutrino emissivity of ${}^3{P}_2$-${}^3{F}_2$ superfluid cores in neutron stars
• Phase structure of neutron ${}^3{P}_2$ superfluids in strong magnetic fields in neutron stars
• Superfluid phases of triplet pairing and neutrino emission from neutron stars
• Collective excitations of a quantized vortex in ${}^3{P}_2$ superfluids in neutron stars
• Microscopic description of axisymmetric vortices in ${}^3{P}_2$ superfluids
• Domain walls in neutron ${}^3{P}_2$ superfluids in neutron stars
• New eigen-mode of spin oscillations in the triplet superfluid condensate in neutron stars
• Critical endpoint and universality class of neutron ${}^3{P}_2$ superfluids in neutron stars
• Coexistence phase of ${}^1{S}_0$ and ${}^3{P}_2$ superfluids in neutron stars
• Spin-polarized phases of ${}^3{P}_2$ superfluids in neutron stars
• Topological defects at the boundary of neutron ${}^3{P}_2$ superfluids in neutron stars
• Core structures of vortices in Ginzburg-Landau theory for neutron ${}^3{P}_2$ superfluids
• Proximity effects of vortices in neutron ${}^3{P}_2$ superfluids in neutron stars: Vortex core transitions and covalent bonding of vortex molecules
• Neutrino emission from Cooper pairs at finite temperatures
• Strongly interacting matter in extreme magnetic fields
• Symmetry classification of uniform states in spin-2 Bose-Einstein condensates and neutron ${}^3{P}_2$ superfluids
• Emergent chirality and superfluidity of parity-doubled baryons in neutron stars