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Strange quark mass from the invariant mass distribution of Cabibbo-suppressed tau decays

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Strange quark mass from the invariant mass distribution of Cabibbo-suppressed tau decays

dc.contributor.author	Chen, Shaomin
dc.contributor.author	Davier, Michel
dc.contributor.author	Gámiz, Elvira
dc.contributor.author	Höcker, Andreas
dc.contributor.author	Pich Zardoya, Antonio
dc.contributor.author	Prades Hernández, Joaquim
dc.date.accessioned	2015-02-27T08:14:37Z
dc.date.available	2015-02-27T08:14:37Z
dc.date.issued	2001
dc.identifier.uri	http://hdl.handle.net/10550/42473
dc.description.abstract	Quark mass corrections to the tau hadronic width play a significant role only for the strange quark. The complete determination of tau decays into strange hadronic final states performed by ALEPH allows the extraction of the strange spectral function. New results on strange decay modes from other experiments are also incorporated into the present analysis. Using as input moments of the spectral function the analysis leading to the determination of rn is conducted using reasonable theoretical constraints on the nonperturbative components. Careful attention is paid to the treatment of the perturbative expansions of the moments which exhibit convergence problems. The result obtained, m(s) (M-tau(2)) = (120 +/- 11(exp) +/- 8(Vus) +/- 19(th)) MeV = (120(-26)(+21)) MeV, is stable over the scale from M-tau(2) down to about 2 GeV2. Its evolution yields m(s)(1 GeV2) = (160(-35)(+28)) MeV and m(s)(4 GeV2) = (116(-26)(+20)) MeV.
dc.language.iso	eng
dc.relation.ispartof	European Physical Journal C, 2001, vol. 22, num. 1, p. 31-38
dc.source	Chen, Shaomin Davier, Michel Gámiz, Elvira Höcker, Andreas Pich Zardoya, Antonio Prades Hernández, Joaquim 2001 Strange quark mass from the invariant mass distribution of Cabibbo-suppressed tau decays European Physical Journal C 22 1 31 38
dc.subject	Física
dc.title	Strange quark mass from the invariant mass distribution of Cabibbo-suppressed tau decays
dc.type	journal article	es_ES
dc.date.updated	2015-02-27T08:14:37Z
dc.identifier.doi	http://dx.doi.org/10.1007/s100520100791
dc.identifier.idgrec	030909
dc.rights.accessRights	open access	es_ES