$D^0 \to K^- e^+ \nu_{e}$ 与 $D^0\to\pi^- e^+ \nu_{e}$ 衰变动力学研究
高能物理 - 实验
2015-09-01 v1
摘要
通过分析在 BEPCII 对撞机上运行 BESIII 探测器于 3.773~GeV 处采集的 2.92~fb 数据样本，我们测得绝对衰变分支比为 和 。通过对微分衰变率的研究，我们得到强子形状因子与 CKM 矩阵元大小的乘积 和 。将这些乘积与来自标准模型约束拟合的 值相结合，我们提取出强子形状因子 和 ，及其比值 。这些形状因子及其比值被用于检验形状因子的 unquenched Lattice QCD 计算及其比值的 light cone sum rule (LCSR) 计算。利用测得的 值与格点 QCD 给出的 值，我们提取出 CKM 矩阵元的值 和 ，其中第三个误差源于形状因子格点 QCD 计算的不确定性。利用 LCSR 给出的 值，我们确定了比值 ，其中第三个误差源于 LCSR 归一化的不确定性。此外，我们还测量了描述这两个半轻子衰变弱强子带电流的三种不同理论模型的形状因子参数。所有这些测量结果均为迄今最精确的。
引用
@article{arxiv.1508.07560,
title = {Study of Dynamics of $D^0 \to K^- e^+ \nu_{e}$ and $D^0\to\pi^- e^+ \nu_{e}$ Decays},
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 and E. Fioravanti and M. Fritsch and C. D. Fu and Q. Gao and X. Y. Gao and Y. Gao and Z. Gao and I. Garzia and K. Goetzen and W. X. Gong and W. Gradl and M. Greco and M. H. Gu and Y. T. Gu and Y. H. Guan and A. Q. Guo and L. B. Guo and Y. Guo and Y. P. Guo and Z. Haddadi and A. Hafner and S. Han and X. Q. Hao and F. A. Harris and K. L. He and X. Q. He and T. Held and Y. K. Heng and Z. L. Hou and C. Hu and H. M. Hu and J. F. Hu and T. Hu and Y. Hu and G. M. Huang and G. S. Huang and J. S. Huang and X. T. Huang and Y. Huang and T. Hussain and Q. Ji and Q. P. Ji and X. B. Ji and X. L. Ji and L. L. Jiang and L. W. Jiang and X. S. Jiang and X. Y. Jiang and J. B. Jiao and Z. Jiao and D. P. Jin and S. Jin and T. Johansson and A. Julin and N. Kalantar-Nayestanaki and X. L. Kang and X. S. Kang and M. Kavatsyuk and B. C. Ke and P. Kiese and R. Kliemt and B. Kloss and O. B. Kolcu and B. Kopf and M. Kornicer and W. Kuehn and A. Kupsc and J. S. Lange and M. Lara and P. Larin and C. Leng and C. Li and Cheng Li and D. M. Li and F. Li and F. Y. Li and G. Li and H. B. Li and J. C. Li and Jin Li and K. Li and K. Li and Lei Li and P. R. Li and T. Li and W. D. Li and W. G. Li and X. L. Li and X. M. Li and X. N. Li and X. Q. Li and Z. B. Li and H. Liang and Y. F. Liang and Y. T. Liang and G. R. Liao and D. X. Lin and B. J. Liu and C. L. Liu and C. X. Liu and F. H. Liu and Fang Liu and Feng Liu and H. B. Liu and H. H. Liu and H. H. Liu and H. M. Liu and J. Liu and J. B. Liu and J. P. Liu and J. Y. Liu and K. Liu and K. Y. Liu and L. D. Liu and P. L. Liu and Q. Liu and S. B. Liu and X. Liu and Y. B. Liu and Z. A. Liu and Zhiqing Liu and H. Loehner and X. C. Lou and H. J. Lu and J. G. Lu and Y. Lu and Y. P. Lu and C. L. Luo and M. X. Luo and T. Luo and X. L. Luo and X. R. Lyu and F. C. Ma and H. L. Ma and L. L. Ma and Q. M. Ma and T. Ma and X. N. Ma and X. Y. Ma and F. E. Maas and M. Maggiora and Y. J. Mao and Z. P. Mao and S. Marcello and J. G. 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Thorndike and M. Tiemens and M. Ullrich and I. Uman and G. S. Varner and B. Wang and D. Wang and D. Y. Wang and K. Wang and L. L. Wang and L. S. Wang and M. Wang and P. Wang and P. L. Wang and S. G. Wang and W. Wang and X. F. Wang and Y. D. Wang and Y. F. Wang and Y. Q. Wang and Z. Wang and Z. G. Wang and Z. H. Wang and Z. Y. Wang and T. Weber and D. H. Wei and J. B. Wei and P. Weidenkaff and S. P. Wen and U. Wiedner and M. Wolke and L. H. Wu and Z. Wu and L. G. Xia and Y. Xia and D. Xiao and H. Xiao and Z. J. Xiao and Y. G. Xie and Q. L. Xiu and G. F. Xu and L. Xu and Q. J. Xu and X. P. Xu and L. Yan and W. B. Yan and W. C. Yan and Y. H. Yan and H. J. Yang and H. X. Yang and L. Yang and Y. Yang and Y. X. Yang and M. Ye and M. H. Ye and J. H. Yin and B. X. Yu and C. X. Yu and J. S. Yu and C. Z. Yuan and W. L. Yuan and Y. Yuan and A. Yuncu and A. A. Zafar and A. Zallo and Y. Zeng and B. X. Zhang and B. Y. Zhang and C. Zhang and C. C. Zhang and D. H. Zhang and H. H. Zhang and H. Y. Zhang and J. J. Zhang and J. L. Zhang and J. Q. Zhang and J. W. Zhang and J. Y. Zhang and J. Z. Zhang and K. Zhang and L. Zhang and X. Y. Zhang and Y. Zhang and Y. N. Zhang and Y. H. Zhang and Y. T. Zhang and Yu Zhang and Z. H. Zhang and Z. P. Zhang and Z. Y. Zhang and G. Zhao and J. W. Zhao and J. Y. Zhao and J. Z. Zhao and Lei Zhao and Ling Zhao and M. G. Zhao and Q. Zhao and Q. W. Zhao and S. J. Zhao and T. C. Zhao and Y. B. Zhao and Z. G. Zhao and A. Zhemchugov and B. Zheng and J. P. Zheng and W. J. Zheng and Y. H. Zheng and B. Zhong and L. Zhou and X. Zhou and X. K. Zhou and X. R. Zhou and X. Y. Zhou and K. Zhu and K. J. Zhu and S. Zhu and S. H. Zhu and X. L. Zhu and Y. C. Zhu and Y. S. Zhu and Z. A. Zhu and J. Zhuang and L. Zotti and B. S. Zou and J. H. Zou},
journal= {arXiv preprint arXiv:1508.07560},
year = {2015}
}