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arXiv 2005.08218hep-ph
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弱B衰变到轨道激发的粲介子

Weak B Decays into Orbitally Excited Charmed Mesons

J. Segovia, C. Albertus, D. R. Entem, F. Fernández, E. Hernández, M. A. Pérez-García

摘要:

BaBar协作组最近报道了$B$介子进入带电和中性$D_{1}(2420)$和$D_{2}^{\ast}(2460)$(两种窄轨道激发的粲介子)终态的半轻子衰变的分支分数。我们评估这些分支分数的框架内的组分夸克模型分两步,其中一个涉及半轻子衰变和其他一个介导的强过程。我们的结果与实验数据一致。

英文摘要:

The BaBar Collaboration has recently reported branching fractions for semileptonic decays of the $B$ meson into final states with charged and neutral $D_{1}(2420)$ and $D_{2}^{\ast}(2460)$, two narrow orbitally excited charmed mesons. We evaluate these branching fractions within the framework of a constituent quark model in two steps, one which involves a semileptonic decay and the other one mediated by a strong process. Our results are in agreement with the experimental data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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