Precision Calculations in B physics
Abstract
We discuss recent higher order calculations to properties of B mesons. This includes next-to-next-to-leading order corrections to nonleptonic and next-to-next-to-next-to-leading order corrections to semileptonic B meson decays. The latter is important in connection to the determination of the CKM matrix element Vcb. We also discuss next-to-next-to-leading order corrections to the width difference in the neutral B meson system.
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