Limits to the radiative decays of neutrinos and axions from. gamma. -ray observations of SN 1987A. [SN 1987A]

Journal Article · Mon Jan 30 00:00:00 EST 1989 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.62.509· OSTI ID:6439145

Kolb, E W; Turner, M S

Using ..gamma..-ray observations made by the Solar Maximum Mission Gamma Ray Spectrometer in the energy range 4.1--6.4 MeV we limit the possible radiative decays of neutrinos and axions emitted by SN 1987A. For neutrinos less massive than about 20 eV our constraint is tau/sub v//m/sub v/approx. >1.7 x 10/sup 15/ B/sub ..gamma../ sec/eV; for masses between 20 and 100 eV, tau/sub v//3.4 x 10/sup 16/ B/sub ..gamma../..gamma../sub GRS//sup -1/2/ sec; and for masses between 100 eV and a few MeV, tau/sub v/m/sub v/approx. >8.4 x 10/sup 17/ B/sub ..gamma../ sec eV. Here B/sub ..gamma../ is the branching ratio for the radiative decay mode and ..gamma../sub GRS/ is yet to be determined from the data, but should be of order unity. The axion mass limit is m/sub a/approx. <55..gamma../sub GRS//sup 11/94/ eV.

• Research Organization: NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500
• OSTI ID: 6439145
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 62:5
• Country of Publication: United States
• Language: English

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