Tau Neutrino Helicity from h Energy Correlations
T. Coan, CLEO Collaboration
Abstract
We report a measurement of the magnitude of the tau neutrino helicity from tau-pair events taken with the CLEO detector at the CESR electron-positron storage ring. Events in which each tau undergoes the decay tau -> h nu, with h a charged pion or kaon, are analyzed for energy correlations between the daughter hadrons, yielding |xi| = 2*|hnu| = 1.03 +/- 0.06 +/- 0.04, with the first error statistical and the second systematic.
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