Differential decay rate for $B\to \pi l\nu$ semileptonic decays

Abstract

We present our study on $B\to \pi l\nu$ semileptonic decay form factors with NRQCD action for heavy quark from a quenched lattice QCD simulation at $\beta$=5.9 on a $16^3\times 48$ lattice. We obtain form factors defined in the context of heavy quark effective theory by Burdman et al. and find that their $1/m_B$ correction is small. The limit of physical heavy and light quark masses can be performed without introducing any model function, and we obtain a prediction for the differential decay rate $d\Gamma /d{q}^2$. We also discuss the soft pion limit of the form factors.

arXiv commentLattice 2000, 4 pages, 4 figures, Latex

References in corpus (1)

• Extraction of the D^*Dπcoupling from D^* decays

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