Spin light of neutrino in gravitational fields

Abstract

We predict a new mechanism for the spin light of neutrino ($SL\nu$) that can be emitted by a neutrino moving in gravitational fields. This effect is studied on the basis of the quasiclassical equation for the neutrino spin evolution in a gravitational field. It is shown that the gravitational field of a rotating object, in the weak-field limit, can be considered as an axial vector external field which induces the neutrino spin procession. The corresponding probability of the neutrino spin oscillations in the gravitational field has been derived for the first time. The considered in this paper $SL\nu$ can be produced in the neutrino spin-flip transitions in gravitational fields. It is shown that the total power of this radiation is proportional to the neutrino gamma factor to the fourth power, and the emitted photon energy, for the case of an ultra relativistic neutrino, could span up to gamma-rays. We investigate the $SL\nu$ caused by both gravitational and electromagnetic fields, also accounting for effects of arbitrary moving and polarized matter, in various astrophysical environments. In particular, we discuss the $SL\nu$ emitted by a neutrino moving in the vicinity of a rotating neutron star, black hole surrounded by dense matter, as well as by a neutrino propagating in the relativistic jet from a quasar.

14 pages in LaTex with 1 eps figure; derivation of the neutrino spin oscillations probability in gravitational fields and several clarifying notes are added, typos corrected

References in corpus (8)

• Electric charge and magnetic moment of massive neutrino
• Neutrino quantum states and spin light in matter
• General Relativistic Effects of Gravity in Quantum Mechanics -- A Case of Ultra-Relativistic, Spin 1/2 Particles --
• Spin light of neutrino in matter and electromagnetic fields
• Neutrino Interferometry In Curved Spacetime
• Electromagnetic Form Factors of a Massive Neutrino
• On a Neutrino Electroweak Radius
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• Aspects of Neutrino Oscillation in Alternative Gravity Theories
• Spin Light of Neutrino in Dense Matter
• Method of wave equations exact solutions in studies of neutrinos and electrons interaction in dense matter
• Quantum treatment of neutrino in background matter
• Three-generation neutrino oscillations in curved spacetime
• Neutrino oscillation in the $q$-metric
• Neutrino electromagnetic interactions: a window to new physics
• Spin light of neutrino in astrophysical environments
• Plasma induced fermion spin-flip conversion f_L -> f_R + gamma
• Interaction of Dirac and Majorana Neutrinos with Weak Gravitational Fields
• Neutrino spin-flavor oscillations in rapidly varying external fields
• Comment on "Neutrino interaction with matter in a noninertial frame"
• Neutrino in magnetic fields: from the first studies to the new effects in neutrino oscillations
• Spin light of relativistic electrons in neutrino fluxes
• Neutrino spin oscillations in gravitational fields in noncommutative higher dimensions