Neutrino emission in neutron matter from magnetic moment interactions
arXiv:astro-ph/0402315 · doi:10.1103/PhysRevC.69.055804
Abstract
Neutrino emission drives neutron star cooling for the first several hundreds of years after its birth. Given the low energy ( keV) nature of this process, one expects very few nonstandard particle physics contributions which could affect this rate. Requiring that any new physics contributions involve light degrees of freedom, one of the likely candidates which can affect the cooling process would be a nonzero magnetic moment for the neutrino. To illustrate, we compute the emission rate for neutrino pair bremsstrahlung in neutron-neutron scattering through photon-neutrino magnetic moment coupling. We also present analogous differential rates for neutrino scattering off nucleons and electrons that determine neutrino opacities in supernovae. Employing current upper bounds from collider experiments on the tau magnetic moment, we find that the neutrino emission rate can exceed the rate through neutral current electroweak interaction by a factor two, signalling the importance of new particle physics input to a standard calculation of relevance to neutron star cooling. However, astrophysical bounds on the neutrino magnetic moment imply smaller effects.
arXiv comment9 pages, 1 figure
References in corpus (17)
- Evidence for oscillation of atmospheric neutrinos
- Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
- Neutrino Emission from Neutron Stars
- Neutrino Interactions in Hot and Dense Matter
- Improved Models of Stellar Core Collapse and Still no Explosions: What is Missing?
- Renormalization group approach to neutron matter: quasiparticle interactions, superfluid gaps and the equation of state
- Neutrino-induced upward stopping muons in Super-Kamiokande
- Polarization contributions to the spin-dependence of the effective interaction in neutron matter
- Neutrino magnetic moments, flavor mixing, and the SuperKamiokande solar data
- Mu and Tau Neutrino Thermalization and Production in Supernovae: Processes and Timescales
- Neutron star cooling: Theoretical aspects and observational constraints
- Neutrino Propagation in Dense Astrophysical Systems
- Neutrino Bremsstrahlung in Neutron Matter from Effective Nuclear Interactions
- Bounding the Tau Neutrino Magnetic Moment from Single Photon Searches at LEP
- Differential Neutrino Rates and Emissivities from the Plasma Process in Astrophysical Systems
- Bound on the tau neutrino magnetic moment from the Super-Kamiokande data
- Stellar-Evolution Limits on Axion Properties