Measurement of the branching ratio of B¯→D(*)τ−ν¯τ relative to B¯→D(*)ℓ−ν¯ℓ decays with hadronic tagging at Belle
Measurement of the branching ratio of B¯→D(*)τ−ν¯τ relative to B¯→D(*)ℓ−ν¯ℓ decays with hadronic tagging at Belle
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DOI：
10.1103/physrevd.92.072014
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发表时间：
2015-10
影响因子：
5
通讯作者：
M. Huschle;T. Kuhr;M. Heck;P. Goldenzweig;A. Abdesselam;I. Adachi;K. Adamczyk;H. Aihara;S. Sai
中科院分区：
文献类型：
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作者：
M. Huschle;T. Kuhr;M. Heck;P. Goldenzweig;A. Abdesselam;I. Adachi;K. Adamczyk;H. Aihara;S. Sai
我们报道了用KEKB非对称能量对撞机上的Belle探测器在ϒ(4S)共振时收集的完整的Belle数据样本，测量了分支分数相对于(Wor)的比率。实测值为，R(D*)=0.293±0.038(STAT)±0.015(SYST)。该分析使用了对标记面和纯轻子衰变的强子重建。结果与之前的测量结果一致，并未显示出与标准模型预测的显著偏差。
We report a measurement of the branching fraction ratiosofrelative to(whereor) using the full Belle data sample ofpairs collected at the ϒ(4S) resonance with the Belle detector at the KEKB asymmetric-energycollider. The measured values areand R(D*)=0.293±0.038(stat)±0.015(syst). The analysis uses hadronic reconstruction of the tag-sidemeson and purely leptonicdecays. The results are consistent with earlier measurements and do not show a significant deviation from the standard model prediction.