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Semileptonic Decay of $B$-Meson into $D^{**}$ and the Bjorken Sum Rule

Masahisa Matsuda·Tsuyoshi B. Suzuki
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Abstract

We study the semileptonic branching fraction of $B$-meson into higher resonance of charmed meson $D^{**}$ by using the Bjorken sum rule and the heavy quark effective theory(HQET). This sum rule and the current experiment of $B$-meson semileptonic decay into $D$ and $D^*$ predict that the branching ratio into $D^{**}lν_l$ is about 1.7\%. This predicted value is larger than the value obtained by the various theoretical hadron models based on the HQET.

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Masahisa Matsuda, Tsuyoshi B. Suzuki. 1996-05-27. Semileptonic Decay of $B$-Meson into $D^{**}$ and the Bjorken Sum Rule. https://doi.org/10.1016/0370-2693(96)00512-6

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