Photon-neutrino interactions in magnetic fields

TL;DR

This paper investigates how magnetic fields enhance low-energy neutrino-photon interactions, calculating increased cross sections and energy-loss rates relevant for astrophysical environments.

Contribution

It provides the first detailed calculation of neutrino-photon interaction cross sections and energy-loss rates in homogeneous magnetic fields.

Findings

Cross sections are increased by a factor of approximately (m_W/m_e)^4(B/B_c)^2 in magnetic fields.

Energy-loss rates due to γγ → νν̄ are quantified in magnetic environments.

Magnetic fields significantly influence neutrino-related processes in astrophysics.

Abstract

The low-energy two neutrino-two photon interactions in the presence of homogeneous magnetic field are studied. The cross sections in external magnetic field are shown to be larger than in vacuum by factor $\sim (m_W /m_e) ^4(B/B_c) ^2$. The energy-loss rate due to the process $\gamma \gamma \to \nu \bar{\nu}$ in magnetic field is obtained.