Semileptonic B and B{sub s} decays into orbitally excited charmed mesons
Semileptonic B and B{sub s} decays into orbitally excited charmed mesons
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DOI：
10.1103/physrevd.84.094029
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发表时间：
2011-07
影响因子：
5
通讯作者：
J. Segovia;C. Albertus;D. R. Entem;F. Fern'andez;E. Hern'andez;M. A. P'erez-Garc'ia
中科院分区：
文献类型：
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作者：
J. Segovia;C. Albertus;D. R. Entem;F. Fern'andez;E. Hern'andez;M. A. P'erez-Garc'ia
BABAR合作最近报道了分支分支的产物，其中包括B介子半光子衰变到带电和中性的D{sub 1}（2420）和D{sub 2}*(2460)这两个窄轨道激发的粲介子的最终态。我们在组成夸克模型的框架内评估这些分支分数，以及与D{sub 0}*(2400)和D{sub 1}{sup '}（2430）介子有关的分支分数。计算分两步进行，其中一步涉及半光子衰减，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{sub s}到轨道激发迷人奇异介子的半光子衰变，为在大型强子对撞机上进行的可能测量提供预测。
The BABAR Collaboration has recently reported products of branching fractions that include B meson semileptonic decays into final states with charged and neutral D{sub 1}(2420) and D{sub 2}*(2460), two narrow orbitally excited charmed mesons. We evaluate these branching fractions, together with those concerning D{sub 0}*(2400) and D{sub 1}{sup '}(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{sub s} into orbitally excited charmed-strange mesons, providing predictions to the possible measurements to be carried out at LHC.