Phys. Rev. Lett. 77, 3299–3302 (1996)Left-Handed Neutrino Disappearance Probe of Neutrino Mass and CharacterReceived 3 June 1996; published in the issue dated 14 October 1996 We explore the sensitivity to a nonvanishing 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+→τ+ντ and mντ = 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. © 1996 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.77.3299
DOI:
10.1103/PhysRevLett.77.3299
PACS:
14.60.Pq, 13.15.+g, 13.20.Fc, 13.88.+e
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