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|V(us)| from strange hadronic tau data
We report on recent work to determine the CKM matrix element |V_{us}| using strange hadronic \tau decay data. We use the recent OPAL update of the strange spectral function, while on the theory side we update the dimension-two perturbative contribution including the recently calculated \alpha_s^3 te...
Autores principales: | , , , , |
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Lenguaje: | eng |
Publicado: |
2006
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Materias: | |
Acceso en línea: | https://dx.doi.org/10.1142/9789812790873_0161 http://cds.cern.ch/record/990676 |
_version_ | 1780911364904058880 |
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author | Gamiz, Elvira Jamin, Matthias Pich, Antonio Prades, Joaquim Schwab, Felix |
author_facet | Gamiz, Elvira Jamin, Matthias Pich, Antonio Prades, Joaquim Schwab, Felix |
author_sort | Gamiz, Elvira |
collection | CERN |
description | We report on recent work to determine the CKM matrix element |V_{us}| using strange hadronic \tau decay data. We use the recent OPAL update of the strange spectral function, while on the theory side we update the dimension-two perturbative contribution including the recently calculated \alpha_s^3 terms. Our result |V_{us}|=0.2220 \pm 0.0033 is already competitive with the standard extraction from K_{e3} decays and other new proposals to determine |V_{us}|. The actual uncertainty on |V_{us}| from \tau data is dominated largely by experiment and will eventually be much reduced by B-factories and future \tau-charm factory data, providing one of the most accurate determinations of this Standard Model parameter. |
id | cern-990676 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2006 |
record_format | invenio |
spelling | cern-9906762023-03-14T18:11:47Zdoi:10.1142/9789812790873_0161http://cds.cern.ch/record/990676engGamiz, ElviraJamin, MatthiasPich, AntonioPrades, JoaquimSchwab, Felix|V(us)| from strange hadronic tau dataParticle Physics - PhenomenologyWe report on recent work to determine the CKM matrix element |V_{us}| using strange hadronic \tau decay data. We use the recent OPAL update of the strange spectral function, while on the theory side we update the dimension-two perturbative contribution including the recently calculated \alpha_s^3 terms. Our result |V_{us}|=0.2220 \pm 0.0033 is already competitive with the standard extraction from K_{e3} decays and other new proposals to determine |V_{us}|. The actual uncertainty on |V_{us}| from \tau data is dominated largely by experiment and will eventually be much reduced by B-factories and future \tau-charm factory data, providing one of the most accurate determinations of this Standard Model parameter.We report on recent work to determine the CKM matrix element |V_{us}| using strange hadronic \tau decay data. We use the recent OPAL update of the strange spectral function, while on the theory side we update the dimension-two perturbative contribution including the recently calculated \alpha_s^3 terms. Our result |V_{us}|=0.2220 \pm 0.0033 is already competitive with the standard extraction from K_{e3} decays and other new proposals to determine |V_{us}|. The actual uncertainty on |V_{us}| from \tau data is dominated largely by experiment and will eventually be much reduced by B-factories and future \tau-charm factory data, providing one of the most accurate determinations of this Standard Model parameter.hep-ph/0610246CERN-PH-TH-2006-204UAB-FT-614CERN-PH-TH-2006-204UAB-FT-614oai:cds.cern.ch:9906762006-10-19 |
spellingShingle | Particle Physics - Phenomenology Gamiz, Elvira Jamin, Matthias Pich, Antonio Prades, Joaquim Schwab, Felix |V(us)| from strange hadronic tau data |
title | |V(us)| from strange hadronic tau data |
title_full | |V(us)| from strange hadronic tau data |
title_fullStr | |V(us)| from strange hadronic tau data |
title_full_unstemmed | |V(us)| from strange hadronic tau data |
title_short | |V(us)| from strange hadronic tau data |
title_sort | |v(us)| from strange hadronic tau data |
topic | Particle Physics - Phenomenology |
url | https://dx.doi.org/10.1142/9789812790873_0161 http://cds.cern.ch/record/990676 |
work_keys_str_mv | AT gamizelvira vusfromstrangehadronictaudata AT jaminmatthias vusfromstrangehadronictaudata AT pichantonio vusfromstrangehadronictaudata AT pradesjoaquim vusfromstrangehadronictaudata AT schwabfelix vusfromstrangehadronictaudata |