B→Vγ beyond QCD factorization

被引：209

作者：

Ball, Patricia ^{[1
]}

Jones, Gareth W. ^{[1
]}

Zwicky, Roman ^{[1
]}

机构：

[1] Univ Durham, Dept Phys, IPPP, Durham DH1 3LE, England

来源：

PHYSICAL REVIEW D | 2007年 / 75卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.75.054004

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the main observables in B-u,B-d ->(rho,omega,K-*)gamma and B-s ->((K) over bar (*),phi)gamma decays, i.e. branching ratios and CP and isospin asymmetries. We include QCD factorization results and also the dominant contributions beyond QCD factorization, namely, long-distance photon emission and soft-gluon emission from quark loops. All contributions beyond QCD factorization are estimated from light-cone sum rules. We devise, in particular, a method for calculating soft-gluon emission, building on earlier ideas developed for analogous contributions in nonleptonic decays. Our results are relevant for new-physics searches at the B factories, CERN LHC and a future superflavor factory. Using current experimental data, we also extract vertical bar V-td/V-ts vertical bar and the angle gamma of the unitarity triangle. We give detailed tables of theoretical uncertainties of the relevant quantities which facilitates future determinations of these Cabibbo-Kobayashi-Maskawa parameters from updated experimental results.

引用

页数：27

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