Talk presented by Tetsuya Onogi

Parallel Session: Heavy Quarks I

Tuesday June 29th, 15.10 - 15.30, Pacinotti Room

Authors: JLQCD Collaboration

$B \rightarrow \pi+l+\nu$ Form Factors with NRQCD Heavy and Clover Light Fermions

Abstract: We present our preliminary results on the $B \rightarrow \pi+l+\nu$ form factors with $O(1/m_Q)$ NRQCD heavy and clover light quark. In our calculation, both the action and the current operators are improved up to $O(\alpha a)$. We study the effect of the operator improvement on the form factors. We also compare our result in the soft pion limit with the prediction from the current algebra.

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