Four of the Michel parameters and the average tau-neutrino helicity have been measured by analysing tan decay spectra in 147 pb(-1) of data collected by the L3 detector. The decays tau(-) --> e(-)nu(tau)<(nu)over bar>(e), tau(-) --> mu(-)nu(tau)<(nu)over bar>(mu), tau(-) --> pi(-)nu(tau), tau(-) --> rho(-)nu(tau) and their charge conjugates were considered. The results: rho = 0.762 +/- 0.035, eta = 0.27 +/- 0.14, xi = 0.70 +/- 0.16, xi delta = 0.70 +/- 0.11 and xi(h) = -1.032 +/- 0.031 are consistent with a V-A structure for the weak charged current and lepton universality, (C) 1998 Elsevier Science B.V. All rights reserved.

Measurement of the Michel parameters and the average tau-neutrino helicity from tau decays at LEP / Acciarri, M., Adriani, O., AGUILAR BENITEZ, M., Ahlen, S., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Ambrosi, G., Anderhub, H., Andreev, V.p., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Ball, R.c., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 438:(1998), pp. 405-416. [10.1016/S0370-2693(98)01082-X]

Measurement of the Michel parameters and the average tau-neutrino helicity from tau decays at LEP

BAGNAIA, Paolo;FERRONI, Fernando;GENTILE, Simonetta;GIAGU, Stefano;LUCI, Claudio;ORGANTINI G;
1998

Abstract

Four of the Michel parameters and the average tau-neutrino helicity have been measured by analysing tan decay spectra in 147 pb(-1) of data collected by the L3 detector. The decays tau(-) --> e(-)nu(tau)<(nu)over bar>(e), tau(-) --> mu(-)nu(tau)<(nu)over bar>(mu), tau(-) --> pi(-)nu(tau), tau(-) --> rho(-)nu(tau) and their charge conjugates were considered. The results: rho = 0.762 +/- 0.035, eta = 0.27 +/- 0.14, xi = 0.70 +/- 0.16, xi delta = 0.70 +/- 0.11 and xi(h) = -1.032 +/- 0.031 are consistent with a V-A structure for the weak charged current and lepton universality, (C) 1998 Elsevier Science B.V. All rights reserved.
1998
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the Michel parameters and the average tau-neutrino helicity from tau decays at LEP / Acciarri, M., Adriani, O., AGUILAR BENITEZ, M., Ahlen, S., Alcaraz, J., Alemanni, G., Allaby, J., Aloisio, A., Alviggi, M.g., Ambrosi, G., Anderhub, H., Andreev, V.p., Angelescu, T., Anselmo, F., Arefiev, A., Azemoon, T., Aziz, T., Bagnaia, P., Baksay, L., Ball, R.c., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 438:(1998), pp. 405-416. [10.1016/S0370-2693(98)01082-X]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/241673
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