Dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2}

2009 
We perform a two-flavor dynamical lattice computation of the Isgur-Wise functions tau_{1/2} and tau_{3/2} at zero recoil in the static limit. We find tau_{1/2}(1) = 0.297(26) and tau_{3/2}(1) = 0.528(23) fulfilling Uraltsev's sum rule by around 80%. We also comment on a persistent conflict between theory and experiment regarding semileptonic decays of B mesons into orbitally excited P wave D mesons, the so-called "1/2 versus 3/2 puzzle", and we discuss the relevance of lattice results in this context.
    • Correction
    • Cite
    • Save
    • Machine Reading By IdeaReader
    11
    References
    0
    Citations
    NaN
    KQI
    []