arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.4248hep-phhep-ex
收藏

半轻子$B$和$B_{s}$衰变为轨道激发态粲介子

Semileptonic $B$ and $B_{s}$ decays into orbitally excited charmed mesons

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

摘要:

BaBar协作组最近报道了分支分数的产物,包括$B$介子半轻子衰变到带电和中性$D_{1}(2420)$和$D_{2}^{\ast}(2460)$(两种窄轨道激发的粲介子)的终态。我们评估这些分支分数,连同那些有关$D_{0}^{\ast}(2400)$和$D_{1}'(2430)$介子,在一个组成夸克模型的框架内。计算分两步进行,其中一步涉及半轻子衰变,另一步由强过程介导。我们的结果与实验数据一致。我们还将研究扩展到$B_{s}$的半轻子衰变到轨道激发的粲奇异介子,提供了预测可能的测量进行大型强子对撞机。

英文摘要:

The BaBar Collaboration has recently reported products of branching fractions that include $B$ meson semileptonic decays 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, together with those concerning $D_{0}^{\ast}(2400)$ and $D_{1}'(2430)$ mesons, within the framework of a constituent quark model. The calculation is performed in two steps, one of which involves a semileptonic decay and the other is mediated by a strong process. Our results are in agreement with the experimental data. We also extend the study to semileptonic decays of $B_{s}$ into orbitally excited charmed-strange mesons, providing predictions to the possible measurements to be carried out at LHC.

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。

↑