Constraints on radiative decay of the 17-keV neutrino from COBE measurements

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4437

Title:	Constraints on radiative decay of the 17-keV neutrino from COBE measurements
Authors:	Nath, Biman B.
Keywords:	Background radiations Particle-theory and field-theory models of the early Universe
Issue Date:	Sep-1992
Publisher:	The American Physical Society
Citation:	Physical Review D, 1992, Vol.46, p2341
Abstract:	It is shown that, for a nontrivial radiative decay channel of the 17-keV neutrino, the photons would distort the microwave background radiation through ionization of the Universe. The constraint on the branching ratio of such decays from Cosmic Background Explorer measurements is found to be more stringent than that from SN 1987A. The limit on the branching ratio in terms of the Compton y parameter is Bγ<=1.5×10-7[τν/(1011 sec)]0.45 (y/10-3)1.11h-1 for an Ω=1, ΩB=0.1 universe.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/4437
ISSN:	1550-7998 1550-2368
Alternative Location:	http://adsabs.harvard.edu/abs/1992PhRvD..46.2341N http://dx.doi.org/10.1103/PhysRevD.46.2341 http://arxiv.org/abs/astro-ph/9208004
Copyright:	(1992) by the American Physical Society
Appears in Collections:	Research Papers (A&A)

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