A bound on the tau neutrino mass is established using the data collected from 1991 to 1995 at root s similar or equal to m(Z) with the ALEPH detector. Two separate limits are derived by fitting the distribution of visible energy vs invariant mass in tau(-) --> 2 pi(-)pi(+)nu(tau) --> 3 pi(-)2 pi(+)(pi(0))nu(tau) decays. The two results are combined to obtain a 95% confidence level upper limit of 18.2MeV/c(2) on the mass of the tau neutrino.

An upper limit on the tau neutrino mass from three- and five-prong tau decays

SELVAGGI, Giovanna;NUZZO, Salvatore Vitale;DE PALMA, Mauro
1998-01-01

Abstract

A bound on the tau neutrino mass is established using the data collected from 1991 to 1995 at root s similar or equal to m(Z) with the ALEPH detector. Two separate limits are derived by fitting the distribution of visible energy vs invariant mass in tau(-) --> 2 pi(-)pi(+)nu(tau) --> 3 pi(-)2 pi(+)(pi(0))nu(tau) decays. The two results are combined to obtain a 95% confidence level upper limit of 18.2MeV/c(2) on the mass of the tau neutrino.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/28153
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