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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 (one of the alternative locations)
ISSN: 1550-7998
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Copyright: (1992) by the American Physical Society
Appears in Collections:Research Papers (A&A)

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