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Quenched and first unquenched lattice HQET determination of the B-s-meson width difference
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Quenched and first unquenched lattice HQET determination of the B-s-meson width difference
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| dc.contributor.author | Giménez Gómez, Vicente | |
| dc.contributor.author | Reyes Gámez, Juan | |
| dc.date.accessioned | 2014-09-26T08:48:21Z | |
| dc.date.available | 2014-09-26T08:48:21Z | |
| dc.date.issued | 2001 | |
| dc.identifier.citation | Giménez Gómez, Vicente 2001 Quenched and first unquenched lattice HQET determination of the B-s-meson width difference Nuclear Physics B-Proceedings Supplements 94 1-3 350 353 | |
| dc.identifier.uri | http://hdl.handle.net/10550/38995 | |
| dc.description.abstract | We present recent results for the prediction of the B-s(0)-(B) over bar (0)(s) lifetime difference from lattice Heavy Quark Effective Theory simulations. In order to get a next-to-leading order result we have calculated the matching between QCD and HQET and the two-loop anomalous dimensions in the HQET for all the DeltaB=2 operators, in particular for the operators which enter the width difference. We present results from quenched and, for the first time, from unquenched simulations. We obtain for the B-s(0)-(B) over bar (0)(s) lifetime difference, Delta Gamma (Bs)/Gamma ((que.))(Bs) = (5.1 +/- 1.9 +/- 1.7) x 10(-2) and Delta Gamma (Bs)/Gamma ((unq))(Bs) = (4.3 +/- 2.0 +/- 1.9) x 10(-2) from the quenched and unquenched simulations respectively. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Nuclear Physics B-Proceedings Supplements, 2001, vol. 94, num. 1-3, p. 350-353 | |
| dc.subject | Partícules (Física nuclear) | |
| dc.title | Quenched and first unquenched lattice HQET determination of the B-s-meson width difference | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2014-09-26T08:48:21Z | |
| dc.identifier.doi | 10.1016/S0920-5632(01)00928-8 | |
| dc.identifier.idgrec | 041498 | |
| dc.rights.accessRights | open access | es_ES |
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