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Measurement of the Strangeness Spectral Function and the Mass of the Strange Quark with the Opal Detector at LEP
- Source :
-
Nuclear Physics B Proceedings Supplement . Jul2005, Vol. 144 Issue 1-3, p73-80. 8p. - Publication Year :
- 2005
-
Abstract
- Tau lepton decays with open strangeness in the final state are measured with the Opal detector at LEP to determine the strange hadronic spectral function of the τ lepton and the mass of the strange quark. The decays , and with final states consisting of neutral and charged kaons and pions, have been studied. The invariant mass distribution of 93.4% of these final states have been experimentally determined. Monte Carlo simulations have been used for the remaining 6.6% and for the strange final states including η mesons. The reconstructed strange final states, corrected for resolution effects and detection efficiencies, yield the strange spectral function of the τ lepton. The moments of the spectral function which are important input parameters for theoretical analyses, are determined. From the CKM weighted difference of strange and non-strange spectral moments, the mass of the strange quark has been measured to be . Furthermore, the branching fractions and have been measured. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09205632
- Volume :
- 144
- Issue :
- 1-3
- Database :
- Academic Search Index
- Journal :
- Nuclear Physics B Proceedings Supplement
- Publication Type :
- Periodical
- Accession number :
- 17552778
- Full Text :
- https://doi.org/10.1016/j.nuclphysbps.2005.02.010