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  • Study of the decays D + → η...
    Achasov, M. N.; Ahmed, S.; Bai, Y.; Berger, N.; Boger, E.; Boyko, I.; Chai, J.; Chen, X. R.; Denig, A.; Destefanis, M.; Dong, L. Y.; Fang, Y.; Feldbauer, F.; Fioravanti, E.; Fu, C. D.; Gradl, W.; Gu, S.; Guo, L. B.; Han, S.; Harris, F. A.; Held, T.; Heng, Y. K.; Holtmann, T.; Hu, H. M.; Hu, T.; Huang, X. Z.; Jin, S.; Johansson, T.; Julin, A.; Khan, T.; Khoukaz, A.; Kiese, P.; Koch, L.; Kuemmel, M.; Kuhlmann, M.; Lara, M.; Larin, P.; Li, K. J.; Li, Lei; Li, P. R.; Li, X. Q.; Li, Z. B.; Liang, H.; Liu, D.; Liu, Ke; Liu, Y. B.; Lu, Y. P.; Ma, H. L.; Ma, X. Y.; Ma, Y. M.; Maggiora, M.; Malik, Q. A.; Mo, X. H.; Morales Morales, C.; Ouyang, Q.; Peng, H. P.; Ping, J. L.; Poling, R.; Prasad, V.; Qi, H. R.; Qiu, J. F.; Richter, M.; Rolo, M.; Shao, M.; Song, J. J.; Sun, Y. K.; Sun, Z. T.; Tang, C. J.; Uman, I.; Varner, G. S.; Wang, B. L.; Wang, D. Y.; Wang, L. S.; Wang, Y. D.; Wang, Y. Q.; Wang, Z. G.; Wu, L. J.; Xiao, Z. J.; Xiong, X. A.; Xu, L.; Yin, J. H.; Yu, J. S.; Yuan, C. Z.; Yuan, Y.; Zafar, A. A.; Zeng, Z.; Zhang, C. C.; Zhang, D. H.; Zhang, J.; Zhang, J. L.; Zhang, K.; Zhang, Y. H.; Zhao, J. Y.; Zhao, Lei; Zhao, M. G.; Zhao, T. C.; Zhong, B.; Zhou, X. K.; Zhu, Y. C.; Zhu, Z. A.

    Physical review. D, 05/2018, Letnik: 97, Številka: 9
    Journal Article

    The charm semileptonic decays D+→ηe+νe and D+→η′e+νe are studied with a sample of e+e− collision data corresponding to an integrated luminosity of 2.93 fb−1 collected at s=3.773 GeV with the BESIII detector. We measure the branching fractions for D+→ηe+νe to be (10.74±0.81±0.51)×10−4, and for D+→η′e+νe to be (1.91±0.51±0.13)×10−4, where the uncertainties are statistical and systematic, respectively. In addition, we perform a measurement of the form factor in the decay D+→ηe+νe. All the results are consistent with those obtained by the CLEO-c experiment.