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Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$
Data sets comprising 24 pb**-1 collected with the ALEPH detector a LEP in 1990 to 1992 were used to measure the Michel Parameters and the mean tau polarisation. The assumption of v and a type couplings in the production of the tau pairs allowed the correlation of the heli- cities of the tau+ and tau...
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| Lenguaje: | eng |
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CERN
1993
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| Acceso en línea: | http://cds.cern.ch/record/391717 |
| _version_ | 1780893752508809216 |
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| author | Wolf, B |
| author_facet | Wolf, B |
| author_sort | Wolf, B |
| collection | CERN |
| description | Data sets comprising 24 pb**-1 collected with the ALEPH detector a LEP in 1990 to 1992 were used to measure the Michel Parameters and the mean tau polarisation. The assumption of v and a type couplings in the production of the tau pairs allowed the correlation of the heli- cities of the tau+ and tau- to be used to derive the information on the neutral and charged weak current. The Michel Parameters rho, ksi and for the first time delta are measu- red for the leptonic tau decays. In the hadronic tau decays into pion and rho the ksi parameter which equals the average tau neutrino heli-city is determined. All measurements show agreement with the Standard Model expectation at the current level of precision. |
| id | cern-391717 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1993 |
| publisher | CERN |
| record_format | invenio |
| spelling | cern-3917172019-09-30T06:29:59Zhttp://cds.cern.ch/record/391717engWolf, BMeasurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$Particle Physics - ExperimentData sets comprising 24 pb**-1 collected with the ALEPH detector a LEP in 1990 to 1992 were used to measure the Michel Parameters and the mean tau polarisation. The assumption of v and a type couplings in the production of the tau pairs allowed the correlation of the heli- cities of the tau+ and tau- to be used to derive the information on the neutral and charged weak current. The Michel Parameters rho, ksi and for the first time delta are measu- red for the leptonic tau decays. In the hadronic tau decays into pion and rho the ksi parameter which equals the average tau neutrino heli-city is determined. All measurements show agreement with the Standard Model expectation at the current level of precision.CERNCERN-ALEPH-THESIS-94-150oai:cds.cern.ch:3917171993 |
| spellingShingle | Particle Physics - Experiment Wolf, B Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$ |
| title | Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$ |
| title_full | Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$ |
| title_fullStr | Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$ |
| title_full_unstemmed | Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$ |
| title_short | Measurement of Michel Parameters and $\tau$ Neutrino Helicity in $Z^{0} \to \tau^{+}\tau^{-}$ |
| title_sort | measurement of michel parameters and $\tau$ neutrino helicity in $z^{0} \to \tau^{+}\tau^{-}$ |
| topic | Particle Physics - Experiment |
| url | http://cds.cern.ch/record/391717 |
| work_keys_str_mv | AT wolfb measurementofmichelparametersandtauneutrinohelicityinz0totautau |