Spin flip of neutrinos with magnetic moment in core-collapse supernovaстатья
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Neutrinos with magnetic moment experience chirality flips while
scattering off charged particles. It is known that if neutrino is a
Dirac fermion, then such chirality flips lead to the production of
sterile right-handed neutrinos inside the core of a star during the
stellar collapse, which may facilitate the supernova explosion and
modify the supernova neutrino signal. In the present paper we reexamine
the production of right-handed neutrinos during the collapse using a
dynamical model of the collapse. We refine the estimates of the values
of the Dirac magnetic moment which are necessary to substantially alter
the supernova dynamics and neutrno signal. It is argued in particular
that Super-Kamiokande will be sensitive at least to {\micro}$_{ ν
Dirac}$ = 10$^{-13}${\micro}$_{B}$ in case of a
galactic supernova explosion. Also we briefly discuss the case of
Majorana neutrino magnetic moment. It is pointed out that in the inner
supernova core spin flips may quickly equilibrate electron neutrinos
with nonelectron antineutrinos if {\micro}$_{ ν Majorana}$
{\gsim} 10$^{-12}${\micro}$_{B}$. This may lead to
various consequences for supernova physics.