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Strong interaction effects in semileptonic B decays

Nikolai Uraltsev
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Abstract

Strong interaction effects are addressed in connection to extracting |V_{cb}|. A comprehensive approach is described not relying on a 1/m_c expansion; it allows a percent accuracy without ad hoc assumptions about higher-order effects. An alternative to the M_X^2 variable is proposed improving convergence. Intrinsic hardness of integrated observables with a cut on E_\ell is discussed; it can be responsible for the behavior of reported by BaBar. Consequences of the proximity to the `BPS' limit are considered.

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Nikolai Uraltsev. 2002-10-02. Strong interaction effects in semileptonic B decays. https://doi.org/10.1016/s0920-5632(03)90615-3

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