Constraints to the decays of Dirac neutrinos from SN 1987A. [SN 1987a]

Journal Article · Mon Apr 27 04:00:00 EDT 1992 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.68.2572· OSTI ID:7183679

Dodelson, S; Frieman, J A; Turner, M S ^[1]

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1. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 (United States) Department of Physics, The University of Chicago, Chicago, Illinois 60637-1433 (United States) Department of Astronomy Astrophysics, The University of Chicago, Chicago, Illinois 60637-1433 (United States) Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637-1433 (United States)

The wrong-helicity states of keV-mass Dirac neutrinos are emitted copiously from the cores of newly born neutron stars, including that associated with SN 1987A. If they decay into proper-helicity neutrinos---{nu}{sub {ital e}}, {nu}{sub {mu}}, {bar {nu}}{sub {ital e}}, or {bar {nu}}{sub {mu}}---they should have produced distinctive high-energy events in the Kamiokande II and Irvine-Michigan-Brookhaven detectors. The absence of such events excludes these decay modes for a Dirac neutrino of mass between order 1 and 300 keV and lifetime 10{sup {minus}9}({ital m}{sub {nu}}/(1 keV )) sec {approx lt}{tau}{approx lt}5{times}10{sup 7}({ital m}{sub {nu}}/(1 keV)) sec. This places severe constraints on models for Simpson's 17-keV neutrino.

• OSTI ID: 7183679
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:17; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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