Strong interaction effects in semileptonic B decays

Details Strong interaction effects in semileptonic B decays Strong interaction effects in semileptonic B decays

2002-10-02

arxiv.org/abs/hep-ph/0210044v1

Proc. of the 31st International Conference on High Energy Physics, Amsterdam, The Netherlands, 25-31 July 2002 (North-Holland

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages (two-column), LaTeX, uses espcrc2.sty. Talk given at ICHEP-2002, July 24-31 2002, Amsterdam

Scientific paper

10.1016/S0920-5632(03)90615-3

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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