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| DC Field | Value | Language |
|---|---|---|
| dc.creator | Gámiz, Elvira | - |
| dc.creator | Jamin, Matthias | - |
| dc.creator | Pich, Antonio | - |
| dc.creator | Prades, Joaquim | - |
| dc.creator | Schwab, Felix | - |
| dc.date | 2008-04-17T23:18:05Z | - |
| dc.date | 2008-04-17T23:18:05Z | - |
| dc.date | 2007 | - |
| dc.date.accessioned | 2017-01-31T01:02:29Z | - |
| dc.date.available | 2017-01-31T01:02:29Z | - |
| dc.identifier | PoS - Proceedings of Science (KAON) 008 (2007) | - |
| dc.identifier | 1824-8039 | - |
| dc.identifier | http://hdl.handle.net/10261/3639 | - |
| dc.identifier.uri | http://dspace.mediu.edu.my:8181/xmlui/handle/10261/3639 | - |
| dc.description | 9 páginas.-- Comunicación presentada a la Kaon International Conference (KAON'07) celebrada del 21 al 25 de MAyo de 2007 en Frascati (Italia). | - |
| dc.description | A very precise determination of V_us can be obtained from the semi-inclusive hadronic decay width of the tau lepton into final states with strangeness. The ratio of the Cabibbo-suppressed and Cabibbo-allowed tau decay widths directly measures (V_us/V_ud)^2, up to very small SU(3)-breaking corrections which can be theoretically estimated with the needed accuracy. Together with previous LEP and CLEO data, the recent measurements by Babar and Belle of some Cabibbo-suppressed tau decays imply V_us= 0.2165 +- 0.0026_exp +- 0.0005_th, which is already competitive with the standard extraction from K_l3 decays. The uncertainty is largely dominated by experimental errors and should be easily reduced with the high statistics of the B factories, providing the most accurate determination of this parameter. A 1% experimental precision on the Cabibbo-suppressed tau decay width would translate into a 0.6% uncertainty on V_us. | - |
| dc.description | This work has been supported by the European Commission MRTN FLAVIAnet [MRTN-CT- 2006-035482], theMEC (Spain) and FEDER (EC) [FPA2005-02211 (M.J.), FPA2004-00996 (A.P.) and FPA2006-05294 (J.P.)], the Deutsche Forschungsgemeinschaft (F.S.), the Junta de Andalucía [P05-FQM-101 (J.P.), P05-FQM-437 (E.G. and J.P.) and Sabbatical Grant PR2006-0369 (J.P.)] and the Generalitat Valenciana [GVACOMP2007-156 (A.P.)]. | - |
| dc.description | Peer reviewed | - |
| dc.format | 113258 bytes | - |
| dc.format | application/pdf | - |
| dc.language | eng | - |
| dc.publisher | International School for Advanced Studies | - |
| dc.relation | http://pos.sissa.it/cgi-bin/reader/conf.cgi?confid=46 | - |
| dc.rights | openAccess | - |
| dc.title | Theoretical progress on the V_us determination from tau decays | - |
| dc.type | Comunicación de congreso | - |
| Appears in Collections: | Digital Csic | |
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