Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-03-28
JHEP 0604:046,2006
Physics
High Energy Physics
High Energy Physics - Phenomenology
23 pages; new BaBar results on B->(rho/omega)gamma included
Scientific paper
10.1088/1126-6708/2006/04/046
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. Using QCD factorisation for the branching ratios, and the current experimental average for R quoted by HFAG, this translates into |V_td/V_ts|^HFAG_{B->V gamma} = 0.192 \pm 0.014(th) \pm 0.016(exp). This result agrees, within errors, with that obtained from the Standard Model unitarity triangle, |V_td/V_ts|_SM = 0.216 \pm 0.029, based on tree-level-only processes, and with |V_td/V_ts|_{Delta m} = 0.2060^{+0.0081}_{-0.0060}(th) \pm 0.0007(exp), from the CDF measurement of B_s oscillations.
Ball Patricia
Zwicky Roman
No associations
LandOfFree
|V_td/V_ts| from B-> V gamma does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with |V_td/V_ts| from B-> V gamma, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and |V_td/V_ts| from B-> V gamma will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-463463