Heavy Quark Kinetic Energy in B Mesons by a QCD Relativistic Potential   Model
  The matrix element of the kinetic energy operator between B meson states is computed by means of a QCD relativistic potential model, with the result: $\mu_\pi^2=0.66 GeV^2$. A comparison with the outcome of other theoretical approaches and a discussion of the phenomenological implications of this result are carried out. 
F. De Fazio