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Título: | |V_us| from Strange Hadronic Tau Data |
Autor: | Gámiz, Elvira; Jamin, Matthias; Pich, Antonio CSIC ORCID; Prades, Joaquim; Schwab, Félix | Fecha de publicación: | nov-2007 | Editor: | World Scientific Publishing | Citación: | High Energy Physics 2: 786-789 (2007) | Resumen: | 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. | Descripción: | 4 páginas.-- Comunicación presentada en la 33ª International Conference on High Energy Physics (ICHEP'06) celebrada del 26 de Julio al 2 de Agosto de 2006 en Moscu (Rusia).-- Editores: Alexey Sissakian, Gennady Kozlov y Elena Kolganova.-- arXiv:hep-ph/0610246v1 | Versión del editor: | http://www.worldscibooks.com/physics/6312.html | URI: | http://hdl.handle.net/10261/33066 | ISBN: | 978-981-270-385-9 |
Aparece en las colecciones: | (IFIC) Libros y partes de libros |
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