Threshold Resummation in Semi-Inclusive B decays

Details Threshold Resummation in Semi-Inclusive B decays Threshold Resummation in Semi-Inclusive B decays

2007-05-03

arxiv.org/abs/0705.0463v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 9 figures. Talk given at the 4th International Workshop on the CKM Unitarity Triangle (CKM 2006), Nagoya, Japan, 12-1

Scientific paper

We discuss threshold resummation in radiative and charmless semileptonic B decays. To deal with the large non perturbative effects, we introduce a model for NNLL resummed form factors based on the analytic QCD coupling. By means of this model we can reproduce with good accuracy the experimental data. Finally we briefly present an improved threshold resummed formula to deal with jets initiated by massive quarks as in the case of semileptonic charmed decays.

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