Neutrino refractive effects during their decoupling era in the early
universe
R. Sawyer. (2020)cite arxiv:2011.05456Comment: 5 pages, 3 ,figures.
Аннотация
There is an accepted approach to calculation of the neutrino flavor
density-matrix in the halo of a supernova, in which neutrino amplitudes, not
cross-sections, need to be followed carefully in the region above the region of
frequent scatterings. We apply the same reasoning and techniques to the
evolution of neutrino flavors and energy distributions in the early universe in
the era of neutrino decoupling. It is likely that the resulting changes to the
classic numbers that have been used in cosmology will be significantly greater
than the ones that are being found in recent updates of the theory in this
region. In the latter the neutrino-neutrino interaction still enters the
equations essentially as a cross-section. On a closely related issue we believe
that the subject of production of light sterile neutrinos, should they exist,
will be turned totally upside down. It is too early to know exactly where it is
going, but we have a potent example with production rates orders of magnitude
larger than those of a conventional calculation.
Описание
Neutrino refractive effects during their decoupling era in the early universe
%0 Generic
%1 sawyer2020neutrino
%A Sawyer, R. F.
%D 2020
%K tifr
%T Neutrino refractive effects during their decoupling era in the early
universe
%U http://arxiv.org/abs/2011.05456
%X There is an accepted approach to calculation of the neutrino flavor
density-matrix in the halo of a supernova, in which neutrino amplitudes, not
cross-sections, need to be followed carefully in the region above the region of
frequent scatterings. We apply the same reasoning and techniques to the
evolution of neutrino flavors and energy distributions in the early universe in
the era of neutrino decoupling. It is likely that the resulting changes to the
classic numbers that have been used in cosmology will be significantly greater
than the ones that are being found in recent updates of the theory in this
region. In the latter the neutrino-neutrino interaction still enters the
equations essentially as a cross-section. On a closely related issue we believe
that the subject of production of light sterile neutrinos, should they exist,
will be turned totally upside down. It is too early to know exactly where it is
going, but we have a potent example with production rates orders of magnitude
larger than those of a conventional calculation.
@misc{sawyer2020neutrino,
abstract = {There is an accepted approach to calculation of the neutrino flavor
density-matrix in the halo of a supernova, in which neutrino amplitudes, not
cross-sections, need to be followed carefully in the region above the region of
frequent scatterings. We apply the same reasoning and techniques to the
evolution of neutrino flavors and energy distributions in the early universe in
the era of neutrino decoupling. It is likely that the resulting changes to the
classic numbers that have been used in cosmology will be significantly greater
than the ones that are being found in recent updates of the theory in this
region. In the latter the neutrino-neutrino interaction still enters the
equations essentially as a cross-section. On a closely related issue we believe
that the subject of production of light sterile neutrinos, should they exist,
will be turned totally upside down. It is too early to know exactly where it is
going, but we have a potent example with production rates orders of magnitude
larger than those of a conventional calculation.},
added-at = {2020-11-12T07:04:23.000+0100},
author = {Sawyer, R. F.},
biburl = {https://www.bibsonomy.org/bibtex/2703cd7fd64266dcfcef2b44cfad85d6b/citekhatri},
description = {Neutrino refractive effects during their decoupling era in the early universe},
interhash = {1dfa66afb3fb49ca78be5f3767263e3d},
intrahash = {703cd7fd64266dcfcef2b44cfad85d6b},
keywords = {tifr},
note = {cite arxiv:2011.05456Comment: 5 pages, 3 ,figures},
timestamp = {2020-11-12T07:04:23.000+0100},
title = {Neutrino refractive effects during their decoupling era in the early
universe},
url = {http://arxiv.org/abs/2011.05456},
year = 2020
}