Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-03-29
Mod.Phys.Lett. A13 (1998) 1791
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, LaTex
Scientific paper
10.1142/S0217732398001868
If the magnetic moment of unstable tau neutrinos with the mass of $O$(MeV) is in the region of $10^{-8}\mu_{B} \lesssim \mu_{\nu_{\tau}} \lesssim 10^{-6}\mu_{B}$, it is compatible with the present experimental and cosmological bounds. It is pointed out here, that if the tau neutrino has such a large magnetic moment and can oscillate into a neutrino of another flavour the results from $\nu e$ scattering experiment at LAMPF constrain the tau neutrino mixing angles to $sin^{2}2\theta_{e \tau} \lesssim 2\times 10^{-6} - 2\times 10^{-2}$ and $sin^{2}2\theta_{\mu\tau} \lesssim 10^{-6} - 10^{-2}$ depending on the magnetic moment value in the allowed region.
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