Unraveling Soft Components in the Shape Function for Inclusive B Decays
  We present a systematic study of the shape function for inclusive B-meson decays in the heavy-quark limit, which is based on the QCD equations of motion and heavy-quark symmetry, and takes into account the cusp divergence due to radiative corrections. 
Hiroyuki Kawamura (1), Jiro Kodaira (2), Kazuhiro Tanaka (3) ((1)   RIKEN, (2) KEK, (3) Juntendo Univ.)