$\Lambda^+_{c}\to \Lambda e^+\nu_e$的绝对分支比测量
高能物理 - 实验
2015-12-02 v1
摘要
我们报道了分支比的首次绝对测量。该测量基于在 GeV产生的567 pb 湮灭数据，该能量刚好高于阈值。数据由BEPCII存储环上的BESIII探测器收集。分支比确定为，精度较先前发表结果提高一倍以上。由于的分支比是其他半轻子道分支比的基准，我们的结果为不同理论模型提供了独特的检验，这是迄今为止最严格的检验。
引用
@article{arxiv.1510.02610,
title = {Measurement of the absolute branching fraction for $\Lambda^+_{c}\to \Lambda e^+\nu_e$},
author = {BESIII Collaboration and M. Ablikim and M. N. Achasov and X. C. Ai and O. Albayrak and M. Albrecht and D. J. Ambrose and A. Amoroso and F. F. An and Q. An and J. Z. Bai and R. Baldini Ferroli and Y. Ban and D. W. Bennett and J. V. Bennett and M. Bertani and D. Bettoni and J. M. Bian and F. Bianchi and E. Boger and I. Boyko and R. A. Briere and H. Cai and X. Cai and O. Cakir and A. Calcaterra and G. F. Cao and S. A. Cetin and J. F. Chang and G. Chelkov and G. Chen and H. S. Chen and H. Y. Chen and J. C. Chen and M. L. Chen and S. J. Chen and X. Chen and X. R. Chen and Y. B. Chen and H. P. Cheng and X. K. Chu and G. Cibinetto and H. L. Dai and J. P. Dai and A. Dbeyssi and D. Dedovich and Z. Y. Deng and A. Denig and I. Denysenko and M. Destefanis and F. De Mori and Y. Ding and C. Dong and J. Dong and L. Y. Dong and M. Y. Dong and S. X. Du and P. F. Duan and E. E. Eren and J. Z. Fan and J. Fang and S. S. Fang and X. Fang and Y. Fang and L. Fava and F. Feldbauer and G. Felici and C. Q. Feng},
journal= {arXiv preprint arXiv:1510.02610},
year = {2015}
}