Cosmological bounds to the magnetic moment of heavy {tau} neutrinos

Journal Article · Mon Jul 01 00:00:00 EDT 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.54.1374· OSTI ID:286230

Grasso, D ^[1]; Kolb, E W ^[2]

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1. Department of Theoretical Physics, Uppsala University, Box 803, S-751 08 Uppsala (Sweden)
2. NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)

The magnetic moment of {tau} neutrinos in the MeV mass range may be large enough to modify the cosmological freeze-out calculation and determine the {tau}-neutrino relic density. In this paper we reexamine such a possibility. We calculate the evolution and freeze-out of the {tau}-neutrino number density as a function of its mass and magnetic moment. We then determine its relic density; then calculate its effect upon primordial nucleosynthesis including previously neglected effects. {copyright} {ital 1996 The American Physical Society.}

• OSTI ID: 286230
• Journal Information: Physical Review, D, Vol. 54, Issue 2; Other Information: PBD: Jul 1996
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
TAU NEUTRINOS
MAGNETIC MOMENTS
MASS
FREEZING OUT
DENSITY
NUCLEOSYNTHESIS
HEAVY FERMIONS