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Semileptonic decay of B-meson into D and the Bjorken sum rule |
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| Authors: | Masahisa Matsuda and Tsuyoshi B. Suzuki |
| Affiliation: | a Department of Physics and Astronomy, Aichi University of Education, Kariya Aichi 448, Japan b Department of Physics, Nagoya University, Nagoya 464-01, Japan |
| Abstract: | We study the semileptonic branching fraction of the B-meson into the higher resonance of the charmed meson D** by using the Bjorken sum rule and the heavy quark effective theory (HQET). This sum rule and the current experiment of the B-meson semileptonic decay into D and D* predict that the branching ratio D**lνl is about 1.7%. This predicted value is larger than the value obtained by various models. |
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