Parametric excitation of neutrino pairs by electron plasma waves

Abstract

The collective coupling of neutrinos and anti-neutrinos in a dense plasma is considered. Such a coupling is provided by the existence of electron plasma waves. These waves can parametrically excite neutrino–anti-neutrino pairs, and the parametric decay rate is established. This stimulated process for neutrino pair production can eventually become dominant over the single particle decay rates characteristic of the usual Urca process and provide an alternative mechanism for the neutrino cooling of collapsing neutron stars

Neutrino orbital angular momentum in a plasma vortex

“…where n e is the electron mean plasma density, ω p is the electron plasma frequency, e and m e are the electron charge and mass, ε 0 is the permittivity of vacuum, and G F is the Fermi constant. Equations ( 1)-( 2) have been used to study the collective decay of plasmons into neutrino-antineutrino pairs [20,21]. Here, we neglect such neutrino-antineutrino coupling processes.…”

Coherence and incoherence in extended broadband triplet interaction

“…in a very short time interval the initial modes scatter off the inhomogeneities, creating groups of many modes, the initial combs. Another but equivalent way to see how combs are related to inhomogeneities is to realize that in the interaction of tightly packed group of modes, neighboring wave vectors cannot be properly resolved in finite size spatial scales, a typical occurrence in experimental settings [10,11]. In this case whole groups of modes with similar wave vectors are altogether excited forming the combs.…”

Neutrino-driven instabilities in very dense plasmas

“…However, this is still an open question, since it seems that an additional process has to be considered in order to account for the observations. The plasmon decay [15] and the parametric decay of collective plasma oscillations [16] into neutrino pairs have been considered in a Maxwellian plasma.…”