Threshold Resummation in B --> X_c l nu_l Decays

Alessandro Renzaglia (Rome U. & INFN; Giancarlo Ferrera (Barcelona U. & Florence U.); Giulia Ricciardi (Naples U. & INFN; Leonardo Di Giustino (Parma U. & INFN; Luca Trentadue (Parma U. & INFN; Naples); Parma); Rome); Ugo Aglietti (Rome U. & INFN

arxiv: 0707.2010 · v1 · submitted 2007-07-13 · ✦ hep-ph

Threshold Resummation in B --> X_c l nu_l Decays

Ugo Aglietti (Rome U. & INFN , Rome) , Leonardo Di Giustino (Parma U. & INFN , Parma) , Giancarlo Ferrera (Barcelona U. & Florence U.) , Alessandro Renzaglia (Rome U. & INFN , Giulia Ricciardi (Naples U. & INFN , Naples)

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Luca Trentadue (Parma U. & INFN

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classification ✦ hep-ph

keywords decaysthresholdapproximationcharmcollinearcomputeeffectsfactor

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We compute the QCD form factor resumming threshold logarithms in B --> X_c + l + nu_l decays to next-to-leading logarithmic approximation. We present an interpolation formula including soft as well as collinear effects softened by the non-vanishing charm mass.

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