Precision measurement of the mass of the τ lepton

BESIII Collaboration

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

An energy scan near the τ pair production threshold has been performed using the BESIII detector. About 24 pb-1 of data, distributed over four scan points, were collected. This analysis is based on τ pair decays to ee, eμ, eh, μμ, μh, hh, eρ, μρ and πρ final states, where h denotes a charged π or K. The mass of the τ lepton is measured from a maximum likelihood fit to the τ pair production cross-section data to be mτ = (1776.91 ± 0.12-0.13 +0.10) MeV=c2, which is currently the most precise value in a single measurement.

Lingua originaleInglese
Numero di articolo012001
RivistaPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Numero di pubblicazione1
DOI
Stato di pubblicazionePubblicato - 7 lug 2014
Pubblicato esternamente

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