Inferred 4.4 eV Upper Limits on the Muon- and Tau-Neutrino Masses

Details Inferred 4.4 eV Upper Limits on the Muon- and Tau-Neutrino Masses Inferred 4.4 eV Upper Limits on the Muon- and Tau-Neutrino Masses

1998-08-19

arxiv.org/abs/hep-ph/9808367v1

Phys.Lett.B442:255-258,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, Revtex, uses epsf.sty, 1 postscript figure

Scientific paper

10.1016/S0370-2693(98)01227-1

By combining experimental constraints from atmospheric and solar neutrino oscillations and the tritium beta decay endpoint, we infer upper limits of 4.4 eV on the $\nu_\mu$ and $\nu_\tau$ masses, if the universe consists of three neutrinos. For hierarchical mass spectra $m_3 \gg m_1, m_2$ or $m_3 \simeq m_2 \gg m_1$ we infer that $m_{\nu_\alpha} \lsim 0.08$ eV for $\alpha = e, \mu, \tau$. In a four neutrino universe, and assuming neutrino oscillations also account for the LSND experimental results, $m_{\nu_\alpha} \lsim 5.4$ eV. We also obtain lower limits on the masses.

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