Cosmological Lower Bound on Heavy-Neutrino Masses

Benjamin W. Lee and Steven Weinberg
Phys. Rev. Lett. 39, 165 – Published 25 July 1977
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Abstract

The present cosmic mass density of possible stable neutral heavy leptons is calculated in a standard cosmological model. In order for this density not to exceed the upper limit of 2×1029 g/cm3, the lepton mass would have to be greater than a lower bound of the order of 2 GeV.

  • Received 13 May 1977

DOI:https://doi.org/10.1103/PhysRevLett.39.165

©1977 American Physical Society

Authors & Affiliations

Benjamin W. Lee*,†

  • Fermi National Accelerator Laboratory, Batavia, Illinois 60510

Steven Weinberg

  • Stanford University, Physics Department, Stanford, California 94305

  • *Deceased.
  • Operated by Universities Research Association Inc. under contract with the U. S. Energy Research and Development Administration.
  • On leave 1976-1977 from Harvard University.

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Vol. 39, Iss. 4 — 25 July 1977

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