The neutrino energy spectrum in semileptonic b-hadron decays with identified energetic electrons and muons has been measured. The observed relative energy sharing between the neutrino and the charged lepton is found to be well described with a W-+/- polarization obtained from a free b-quark decay model with a (V-A)x(V-A) decay structure. The alternative of a (V+A) x(V-A) decay structure is excluded with a significance of more than 6 standard deviations. The possibility that hadronic corrections to the b-hadron decay destroy any W-+/- polarization is disfavored by more than 3 standard deviations.

Measurement of the weak charged current structure in semileptonic b-hadron decays at the Z peak

MONACO, Vincenzo;
1995-01-01

Abstract

The neutrino energy spectrum in semileptonic b-hadron decays with identified energetic electrons and muons has been measured. The observed relative energy sharing between the neutrino and the charged lepton is found to be well described with a W-+/- polarization obtained from a free b-quark decay model with a (V-A)x(V-A) decay structure. The alternative of a (V+A) x(V-A) decay structure is excluded with a significance of more than 6 standard deviations. The possibility that hadronic corrections to the b-hadron decay destroy any W-+/- polarization is disfavored by more than 3 standard deviations.
1995
351
375
386
http://www.sciencedirect.com/science/article/pii/0370269395004016#
CHARGED-CURRENT INTERACTIONS; MESON PRODUCTION
M. Acciarri;A. Adam;O. Adriani;M. Aguilar-Benitez;S. Ahlen;J. Alcaraz;A. Aloisio;G. Alverson;M.G. Alviggi;G. Ambrosi;Q. An;H. Anderhub;A.L...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/126625
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