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$|V_{td}/V_{ts}|$ from $B\to V \gamma$

The dominant theoretical uncertainty in extracting |V_td/V_ts| from the ratio of branching ratios R=B(B->(rho,omega)gamma)/B(B-> K* gamma) is given by the ratio of form factors xi = T_1^{B->K*}(0)/T_1^{B-> \rho}(0). We re-examine xi in the framework of QCD sum rules on the light-cone, ta...

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Detalles Bibliográficos
Autores principales: Ball, P, Zwicky, R
Lenguaje:eng
Publicado: 2006
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1126-6708/2006/04/046
http://cds.cern.ch/record/938926
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author Ball, P
Zwicky, R
author_facet Ball, P
Zwicky, R
author_sort Ball, P
collection CERN
description The dominant theoretical uncertainty in extracting |V_td/V_ts| from the ratio of branching ratios R=B(B->(rho,omega)gamma)/B(B-> K* gamma) is given by the ratio of form factors xi = T_1^{B->K*}(0)/T_1^{B-> \rho}(0). We re-examine xi in the framework of QCD sum rules on the light-cone, taking into account hitherto neglected SU(3)-breaking effects. We find xi = 1.17\pm 0.09, which, using QCD factorisation for the branching ratios, and the experimental result for R obtained by the Belle collaboration, currently translates into |V_td/V_ts|= 0.207\pm 0.027(exp) \pm 0.016 (th). This result agrees with that obtained from the Standard Model unitarity triangle based on tree-level-only processes and with |V_td/V_ts| inferred from the two-sided bound on Delta m_s reported recently by the D0 collaboration.
id cern-938926
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2006
record_format invenio
spelling cern-9389262019-09-30T06:29:59Zdoi:10.1088/1126-6708/2006/04/046http://cds.cern.ch/record/938926engBall, PZwicky, R$|V_{td}/V_{ts}|$ from $B\to V \gamma$Particle Physics - PhenomenologyThe dominant theoretical uncertainty in extracting |V_td/V_ts| from the ratio of branching ratios R=B(B->(rho,omega)gamma)/B(B-> K* gamma) is given by the ratio of form factors xi = T_1^{B->K*}(0)/T_1^{B-> \rho}(0). We re-examine xi in the framework of QCD sum rules on the light-cone, taking into account hitherto neglected SU(3)-breaking effects. We find xi = 1.17\pm 0.09, which, using QCD factorisation for the branching ratios, and the experimental result for R obtained by the Belle collaboration, currently translates into |V_td/V_ts|= 0.207\pm 0.027(exp) \pm 0.016 (th). This result agrees with that obtained from the Standard Model unitarity triangle based on tree-level-only processes and with |V_td/V_ts| inferred from the two-sided bound on Delta m_s reported recently by the D0 collaboration.hep-ph/0603232CERN-PH-TH-2006-050IPPP-2006-16oai:cds.cern.ch:9389262006-03-28
spellingShingle Particle Physics - Phenomenology
Ball, P
Zwicky, R
$|V_{td}/V_{ts}|$ from $B\to V \gamma$
title $|V_{td}/V_{ts}|$ from $B\to V \gamma$
title_full $|V_{td}/V_{ts}|$ from $B\to V \gamma$
title_fullStr $|V_{td}/V_{ts}|$ from $B\to V \gamma$
title_full_unstemmed $|V_{td}/V_{ts}|$ from $B\to V \gamma$
title_short $|V_{td}/V_{ts}|$ from $B\to V \gamma$
title_sort $|v_{td}/v_{ts}|$ from $b\to v \gamma$
topic Particle Physics - Phenomenology
url https://dx.doi.org/10.1088/1126-6708/2006/04/046
http://cds.cern.ch/record/938926
work_keys_str_mv AT ballp vtdvtsfrombtovgamma
AT zwickyr vtdvtsfrombtovgamma