First study of $B \to \pi$ semileptonic decay form factors using NRQCD

We present a quenched calculation of the form factors of the semileptonic weak decay $B \to π l \overset{ˉ}{ν}$ with $O (1 / m_{Q})$ NRQCD heavy quark and Wilson light quark on a $16^{3} \times 32$ lattice at $β = 5.8$ . The form factors are evaluated at six heavy quark masses, in the range of $m_{Q} \sim 1.5 - 8$ GeV. $1 / m_{Q}$ dependence of matrix elements are investigated and compared with HQET predictions. We observe clear signal for the form factors near $q_{m a x}^{2}$ , even at the $b$ -quark mass range. $f^{0} (q_{m a x}^{2})$ is compared with $f_{B} / f_{π}$ based on the soft pion theorem and significant difference is observed.

First study of $B \to π$ semileptonic decay form factors using NRQCD

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First study of $B \to π$ semileptonic decay form factors using NRQCD

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First study of B→πB→π semileptonic decay form factors using NRQCD

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First study of B→πB→π semileptonic decay form factors using NRQCD

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First study of $B \to π$ semileptonic decay form factors using NRQCD

讲解博客

AI智能校验

First study of $B \to π$ semileptonic decay form factors using NRQCD

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AI智能校验