Lattice measurement of the Isgur-Wise functions tau_1/2 and tau_3/2
  We propose a method to compute the Isgur-Wise form factors tau_1/2(1) and tau_3/2(1) for the decay of B mesons into orbitally excited (P wave) D** charmed mesons on the lattice in the static limit. We also present the result of an exploratory numerical simulation which shows that the signal/noise ratio allows for a more dedicated computation. We find tau_1/2(1)=0.38(5) and tau_3/2(1)= 0.53(8), with yet unknown systematic errors. These preliminary numbers agree fairly well with theoretical expectation. 
D. Becirevic, B. Blossier, Ph. Boucaud, G. Herdoiza, J.P. Leroy, A.Le   Yaouanc, V. Morenas, O. Pene