arXiv:0707.2010·v1·High Energy Physics — Phenomenology
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, Rome)🇮🇹 · Giulia Ricciardi (Naples U. & INFN, Naples)🇮🇹 · Luca Trentadue (Parma U. & INFN, Parma)🇮🇹
Abstract
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.
Comments: 24 pages, no figures