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Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP
An upper limit for the tau -neutrino mass has been determined from the decay tau to 5 pi /sup +or-/ nu /sub tau / using data collected with the OPAL detector from 1991 to 1995 in e/sup +/e/sup -/ collisions at square root (s) approximately=M/sub Z0/. A limit of 43.2 MeV at 95Ø.000554330L is obtained...
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| Lenguaje: | eng |
| Publicado: |
Bonn Univ.
1998
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| Materias: | |
| Acceso en línea: | http://cds.cern.ch/record/420436 |
| _version_ | 1780894838879682560 |
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| author | Bartoldus, R |
| author_facet | Bartoldus, R |
| author_sort | Bartoldus, R |
| collection | CERN |
| description | An upper limit for the tau -neutrino mass has been determined from the decay tau to 5 pi /sup +or-/ nu /sub tau / using data collected with the OPAL detector from 1991 to 1995 in e/sup +/e/sup -/ collisions at square root (s) approximately=M/sub Z0/. A limit of 43.2 MeV at 95Ø.000554330L is obtained using a two-dimensional method in the 5 pi invariant mass and energy distribution from 22 selected events. Combining this result with OPAL's previously published measurement using tau /sup +/ tau /sup -/ to 3h/sup +or-/v/sub tau /+3h/sup -or+/ nu tau decays, a new combined limit of m/sub nu tau / <27.6 MeV (95 CL) is obtained. |
| id | cern-420436 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1998 |
| publisher | Bonn Univ. |
| record_format | invenio |
| spelling | cern-4204362019-09-30T06:29:59Zhttp://cds.cern.ch/record/420436engBartoldus, RMeasurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEPParticle Physics - ExperimentAn upper limit for the tau -neutrino mass has been determined from the decay tau to 5 pi /sup +or-/ nu /sub tau / using data collected with the OPAL detector from 1991 to 1995 in e/sup +/e/sup -/ collisions at square root (s) approximately=M/sub Z0/. A limit of 43.2 MeV at 95Ø.000554330L is obtained using a two-dimensional method in the 5 pi invariant mass and energy distribution from 22 selected events. Combining this result with OPAL's previously published measurement using tau /sup +/ tau /sup -/ to 3h/sup +or-/v/sub tau /+3h/sup -or+/ nu tau decays, a new combined limit of m/sub nu tau / <27.6 MeV (95 CL) is obtained.Bonn Univ.BONN-IR-98-14oai:cds.cern.ch:4204361998 |
| spellingShingle | Particle Physics - Experiment Bartoldus, R Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP |
| title | Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP |
| title_full | Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP |
| title_fullStr | Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP |
| title_full_unstemmed | Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP |
| title_short | Measurement of the Michel parameters in leptonic $\tau$ decays with the OPAL detector at LEP |
| title_sort | measurement of the michel parameters in leptonic $\tau$ decays with the opal detector at lep |
| topic | Particle Physics - Experiment |
| url | http://cds.cern.ch/record/420436 |
| work_keys_str_mv | AT bartoldusr measurementofthemichelparametersinleptonictaudecayswiththeopaldetectoratlep |