Spin-flavour conversions of neutrinos in collapsing stars

Abstract

I discuss in some detail the spin-flavour conversions of neutrinos in the almost isotopically neutral region of collapsing stars along with the resulting experimental signatures. In particular, I show that for realistic magnetic field strength, the observable effects may exist for neutrino magnetic moment, $\mu \sim (2-3)\times 10^{-14}{\mu }_B$ (${\mu }_B$ is the Bohr magneton) with relevant neutrino mass squared difference, $\Delta m^2\sim (10^{-9}-10^{-8})e{V}^2$.

Comments: 5 pages, Latex (uses sprocl.sty), No figures, Talk presented at Second Meeting on New Worlds in Astroparticle Physics (NW 98),Faro, Portugal, 3-5 September, 1998 (to appear in its proceedings)