Bound on the neutrino magnetic moment from chirality flip in supernovae

Details Bound on the neutrino magnetic moment from chirality flip in supernovae Bound on the neutrino magnetic moment from chirality flip in supernovae

1998-04-04

arxiv.org/abs/hep-ph/9804230v2

Phys.Rev.D59:111901,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, minor changes, new title. Final version to appear in Phys. Rev. D (rapid communication)

Scientific paper

10.1103/PhysRevD.59.111901

For neutrinos with a magnetic moment, we show that the collisions in a hot and dense plasma act as an efficient mechanism for the conversion of $\nu_L$ into $\nu_R$. The production rate for right-handed neutrinos is computed in terms of a resummed photon propagator which consistently incorporates the background effects. Assuming that the entire energy in a supernova collapse is not carried away by the $\nu_R$, our results can be used to place an upper limit on the neutrino magnetic moment $\mu_\nu < (0.1-0.4)\times 10^{-11}\mu_B$

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