Left-handed neutrino disappearance probe of neutrino mass and character

Details Left-handed neutrino disappearance probe of neutrino mass and character Left-handed neutrino disappearance probe of neutrino mass and character

1996-06-04

arxiv.org/abs/hep-ph/9606218v2

Phys.Rev.Lett. 77 (1996) 3299

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages and 2 figures. Last version accepted in PRL, new references and better analysis of experimental possibilities

Scientific paper

10.1103/PhysRevLett.77.3299

We explore the sensitivity to a non vanishing neutrino mass offered by dynamical observables, i.e., branching ratios and polarizations. The longitudinal polarization in the C.M. frame decreases by a 4% for $D^+ \rightarrow \tau^+ \nu_\tau$ and $m_{\nu_\tau}=24$ MeV. Taking advantage of the fact that the polarization is a Lorentz variant quantity, we study the polarization effects in a boosted frame. By means of a neutrino beam, produced by a high velocity boosted parent able to flip the neutrino helicity, we find that an enhanced left-handed neutrino deficit, induced by a Wigner rotation, appears.

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