Radiative decay lifetime of neutrinos and the evolution of the universe after the recombination era

Yoel Rephaeli*, Alexander S. Szalay

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

If the radiative decay lifetime τ of massive neutrinos is less than 1025 s, but exceeding present constraints, the epoch of neutral hydrogen in the history of the universe could have been short or altogether absent. Erasure of small scale fluctuations in the cosmic microwave background radiation and other consequences of such lifetimes are discussed. From observations of neutral hydrogen in the nearby galaxy M 31 a lower limit τ ≥ 1024 s is obtained (for neutrino masses in the range 30 eV ≤ m ≤ 150 eV).

Original languageEnglish
Pages (from-to)73-76
Number of pages4
JournalPhysics Letters B
Volume106
Issue number1-2
DOIs
StatePublished - 29 Oct 1981
Externally publishedYes

Funding

FundersFunder number
National Science FoundationPHY77-27084
U.S. Department of EnergyAC02-80ER10773

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