Measurement of the Strangeness Spectral Function and the Mass of the Strange Quark in Hadronic τ Decays with the Opal Detector
Measurement of the Strangeness Spectral Function and the Mass of the Strange Quark in Hadronic τ Decays with the Opal Detector
dc.contributor.advisor | Hilger, Erwin | |
dc.contributor.author | Mader, Wolfgang Franz | |
dc.date.accessioned | 2020-04-06T18:01:45Z | |
dc.date.available | 2020-04-06T18:01:45Z | |
dc.date.issued | 2004 | |
dc.identifier.uri | https://hdl.handle.net/20.500.11811/2024 | |
dc.description.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 t lepton and the mass of the strange quark. The decays τ--->(Kπ)-ντ, τ--->(Kππ)-ντ and τ--->(Kπππ)-ντ 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 and the ratio of strange to non-strange moments, which are important input parameters for theoretical analyses, are determined. Furthermore, the branching fractions B(τ--->K-π0ντ) = ( (0.471 ±0.064stat ±0.021sys)% B(τ--->K-π+ π-ντ) = ( 0.415 ±0.059stat ±0.031sys)% have been measured. From the CKM weighted difference of strange and non-strange spectral moments, the mass of the strange quark at the t mass scale has been determined ms(mτ2) = ( 84 ±14exp ± 6Vus ±17theo)MeV. Evolving this result to customary scales yieldsms(1 GeV2) = ( 111-35+26) MeV ms(4 GeV2) = ( 82-25+19) MeV. | |
dc.language.iso | eng | |
dc.rights | In Copyright | |
dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | |
dc.subject | spectral Function | |
dc.subject | tau-Lepton | |
dc.subject | Strange Quark Mass | |
dc.subject.ddc | 520 Astronomie, Kartografie | |
dc.title | Measurement of the Strangeness Spectral Function and the Mass of the Strange Quark in Hadronic τ Decays with the Opal Detector | |
dc.type | Dissertation oder Habilitation | |
dc.publisher.name | Universitäts- und Landesbibliothek Bonn | |
dc.publisher.location | Bonn | |
dc.rights.accessRights | openAccess | |
dc.identifier.urn | https://nbn-resolving.org/urn:nbn:de:hbz:5n-03341 | |
ulbbn.pubtype | Erstveröffentlichung | |
ulbbnediss.affiliation.name | Rheinische Friedrich-Wilhelms-Universität Bonn | |
ulbbnediss.affiliation.location | Bonn | |
ulbbnediss.thesis.level | Dissertation | |
ulbbnediss.dissID | 334 | |
ulbbnediss.date.accepted | 10.03.2004 | |
ulbbnediss.fakultaet | Mathematisch-Naturwissenschaftliche Fakultät | |
dc.contributor.coReferee | Wermes, Norbert |
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