科研之友
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摘要
We consider the exclusive decays B -> D(*) l (nu) over bar and study the effect of non-V - A structures on the observables. We extend the standard model hadronic current by additional right-handed vector as well as left-and right-handed scalar and tensor contributions and calculate the decay rates including the perturbative corrections up to order alpha(s). Using the data of the exclusive semileptonic b -> c decays and recent calculations of the form factors at the nonrecoil point, we discuss the constraints to the wrong-helicity admixtures in the hadronic current.
- 出版日期2011-7-19
