Sterile neutrinos in tau lepton decays

Details Sterile neutrinos in tau lepton decays Sterile neutrinos in tau lepton decays

2001-02-13

arxiv.org/abs/hep-ph/0102155v1

Nucl.Phys. B607 (2001) 355-368

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 2 figures

Scientific paper

10.1016/S0550-3213(01)00169-9

We study possible contributions of heavy sterile neutrinos $\nu_h$ to the decays $\tau^-\to e^{\pm}(\mu^{\pm})\pi^{\mp}\pi^-$. From the experimental upper bounds on their rates we derive new constraints on the $\nu_h-\nu_{\tau}$ mixing in the mass region $140.5{MeV}\leq m_{\nu_h}\leq 1637$ MeV. We discuss cosmological and astrophysical status of $\nu_h$ in this mass region and compare our constraints with those recently derived by the NOMAD collaboration.

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