Radiative corrections to the decay B→πeν and the heavy quark limit

被引:121
作者
Bagan, E [1 ]
Ball, P
Braun, VM
机构
[1] Autonomous Univ Barcelona, Dept Fis, Fis Teor Grp, E-08193 Bellaterra, Spain
[2] Autonomous Univ Barcelona, Inst Fis Altes Energies, E-08193 Bellaterra, Spain
[3] Fermi Natl Accelerator Lab, Batavia, IL 60510 USA
[4] NORDITA, DK-2100 Copenhagen, Denmark
关键词
D O I
10.1016/S0370-2693(97)01371-3
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We calculate radiative corrections to the light-cone sum rule for the semileptonic form factor in B --> pi ev decays and thus remove the major uncertainty in determining the CKM mixing angle \V-ub\ by this method. We discuss the remaining uncertainties and perspectives for further studies. The structure of the radiative corrections suggests factorization of soft (end-point) and hard rescattering contributions in heavy-to-light decays in the heavy quark limit. (C) 1998 Elsevier Science B.V.
引用
收藏
页码:154 / 162
页数:9
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