$Measurement of the branching fraction of D + → τ + ν τ$

Measurement of the branching fraction of D + → τ + ν τ

Abstract By analyzing e + e − collision data with an integrated luminosity of 7.9 fb −1 collected with the BESIII detector at the center-of-mass energy of 3.773 GeV, the branching fraction of D + → τ + ν τ is determined as B $$ \mathcal{B} $$ = (9.9 ± 1.1stat ± 0.5syst) × 10 −4. Using the most preci...

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Main Authors:	The BESIII collaboration, M. Ablikim, M. N. Achasov, P. Adlarson, O. Afedulidis, X. C. Ai, R. Aliberti, A. Amoroso, Y. Bai, O. Bakina, I. Balossino, Y. Ban, H.-R. Bao, V. Batozskaya, K. Begzsuren, N. Berger, M. Berlowski, M. Bertani, D. Bettoni, F. Bianchi, E. Bianco, A. Bortone, I. Boyko, R. A. Briere, A. Brueggemann, H. Cai, X. Cai, A. Calcaterra, G. F. Cao, N. Cao, S. A. Cetin, X. Y. Chai, J. F. Chang, G. R. Che, Y. Z. Che, G. Chelkov, C. Chen, C. H. Chen, Chao Chen, G. Chen, H. S. Chen, H. Y. Chen, M. L. Chen, S. J. Chen, S. L. Chen, S. M. Chen, T. Chen, X. R. Chen, X. T. Chen, Y. B. Chen, Y. Q. Chen, Z. J. Chen, Z. Y. Chen, S. K. Choi, G. Cibinetto, F. Cossio, J. J. Cui, H. L. Dai, J. P. Dai, A. Dbeyssi, R. E. de Boer, D. Dedovich, C. Q. Deng, Z. Y. Deng, A. Denig, I. Denysenko, M. Destefanis, F. De Mori, B. Ding, X. X. Ding, Y. Ding, J. Dong, L. Y. Dong, M. Y. Dong, X. Dong, M. C. Du, S. X. Du, Y. Y. Duan, Z. H. Duan, P. Egorov, Y. H. Fan, J. Fang, S. S. Fang, W. X. Fang, Y. Fang, Y. Q. Fang, R. Farinelli, L. Fava, F. Feldbauer, G. Felici, C. Q. Feng, J. H. Feng, Y. T. Feng, M. Fritsch, C. D. Fu, J. L. Fu, Y. W. Fu, H. Gao, X. B. Gao, Y. N. Gao, Yang Gao, S. Garbolino, I. Garzia, L. Ge, P. T. Ge, Z. W. Ge, C. Geng, E. M. Gersabeck, A. Gilman, K. Goetzen, L. Gong, W. X. Gong, W. Gradl, S. Gramigna, M. Greco, M. H. Gu, Y. T. Gu, C. Y. Guan, A. Q. Guo, L. B. Guo, M. J. Guo, R. P. Guo, Y. P. Guo, A. Guskov, J. Gutierrez, K. L. Han, T. T. Han, F. Hanisch, X. Q. Hao, F. A. Harris, K. K. He, K. L. He, F. H. Heinsius, C. H. Heinz, Y. K. Heng, C. Herold, T. Holtmann, P. C. Hong, G. Y. Hou, X. T. Hou, Y. R. Hou, Z. L. Hou, B. Y. Hu, H. M. Hu, J. F. Hu, Q. P. Hu, S. L. Hu, T. Hu, Y. Hu, G. S. Huang, K. X. Huang, L. Q. Huang, X. T. Huang, Y. P. Huang, Y. S. Huang, T. Hussain, F. Hölzken, N. Hüsken, N. in der Wiesche, J. Jackson, S. Janchiv, J. H. Jeong, Q. Ji, Q. P. Ji, W. Ji, X. B. Ji, X. L. Ji, Y. Y. Ji, X. Q. Jia, Z. K. Jia, D. Jiang, H. B. Jiang, P. C. Jiang, S. S. Jiang, T. J. Jiang, X. S. Jiang, Y. Jiang, J. B. Jiao, J. K. Jiao, Z. Jiao, S. Jin, Y. Jin, M. Q. Jing, X. M. Jing, T. Johansson, S. Kabana, N. Kalantar-Nayestanaki, X. L. Kang, X. S. Kang, M. Kavatsyuk, B. C. Ke, V. Khachatryan, A. Khoukaz, R. Kiuchi, O. B. Kolcu, B. Kopf, M. Kuessner, X. Kui, N. Kumar, A. Kupsc, W. Kühn, L. Lavezzi, T. T. Lei, Z. H. Lei, M. Lellmann, T. Lenz, C. Li, C. H. Li, Cheng Li, D. M. Li, F. Li, G. Li, H. B. Li, H. J. Li, H. N. Li, Hui Li, J. R. Li, J. S. Li, K. Li, K. L. Li, L. J. Li, L. K. Li, Lei Li, M. H. Li, P. R. Li, Q. M. Li, Q. X. Li, R. Li, S. X. Li, T. Li, W. D. Li, W. G. Li, X. Li, X. H. Li, X. L. Li, X. Y. Li, X. Z. Li, Y. G. Li, Z. J. Li, Z. Y. Li, C. Liang, H. Liang, Y. F. Liang, Y. T. Liang, G. R. Liao, Y. P. Liao, J. Libby, A. Limphirat, C. C. Lin, C. X. Lin, D. X. Lin, T. Lin, B. J. Liu, B. X. Liu, C. Liu, C. X. Liu, F. Liu, F. H. Liu, Feng Liu, G. M. Liu, H. Liu, H. B. Liu, H. H. Liu, H. M. Liu, Huihui Liu, J. B. Liu, J. Y. Liu, K. Liu, K. Y. Liu, Ke Liu, L. Liu, L. C. Liu, Lu Liu, M. H. Liu, P. L. Liu, Q. Liu, S. B. Liu, T. Liu, W. K. Liu, W. M. Liu, X. Liu, Y. Liu, Y. B. Liu, Z. A. Liu, Z. D. Liu, Z. Q. Liu, X. C. Lou, F. X. Lu, H. J. Lu, J. G. Lu, X. L. Lu, Y. Lu, Y. P. Lu, Z. H. Lu, C. L. Luo, J. R. Luo, M. X. Luo, T. Luo, X. L. Luo, X. R. Lyu, Y. F. Lyu, F. C. Ma, H. Ma, H. L. Ma, J. L. Ma, L. L. Ma, L. R. Ma, M. M. Ma, Q. M. Ma, R. Q. Ma, T. Ma, X. T. Ma, X. Y. Ma, Y. M. Ma, F. E. Maas, I. MacKay, M. Maggiora, S. Malde, Y. J. Mao, Z. P. Mao, S. Marcello, Z. X. Meng, J. G. Messchendorp, G. Mezzadri, H. Miao, T. J. Min, R. E. Mitchell, X. H. Mo, B. Moses, N. Yu. Muchnoi, J. Muskalla, Y. Nefedov, F. Nerling, L. S. Nie, I. B. Nikolaev, Z. Ning, S. Nisar, Q. L. Niu, W. D. Niu, Y. Niu, S. L. Olsen, Q. Ouyang, S. Pacetti, X. Pan, Y. Pan, A. Pathak, Y. P. Pei, M. Pelizaeus, H. P. Peng, Y. Y. Peng, K. Peters, J. L. Ping, R. G. Ping, S. Plura, V. Prasad, F. Z. Qi, H. Qi, H. R. Qi, M. Qi, T. Y. Qi, S. Qian, W. B. Qian, C. F. Qiao, X. K. Qiao, J. J. Qin, L. Q. Qin, L. Y. Qin, X. P. Qin, X. S. Qin, Z. H. Qin, J. F. Qiu, Z. H. Qu, C. F. Redmer, K. J. Ren, A. Rivetti, M. Rolo, G. Rong, Ch. Rosner, M. Q. Ruan, S. N. Ruan, N. Salone, A. Sarantsev, Y. Schelhaas, K. Schoenning, M. Scodeggio, K. Y. Shan, W. Shan, X. Y. Shan, Z. J. Shang, J. F. Shangguan, L. G. Shao, M. Shao, C. P. Shen, H. F. Shen, W. H. Shen, X. Y. Shen, B. A. Shi, H. Shi, J. L. Shi, J. Y. Shi, Q. Q. Shi, S. Y. Shi, X. Shi, J. J. Song, T. Z. Song, W. M. Song, Y. J. Song, Y. X. Song, S. Sosio, S. Spataro, F. Stieler, S. S Su, Y. J. Su, G. B. Sun, G. X. Sun, H. Sun, H. K. Sun, J. F. Sun, K. Sun, L. Sun, S. S. Sun, T. Sun, W. Y. Sun, Y. Sun, Y. J. Sun, Y. Z. Sun, Z. Q. Sun, Z. T. Sun, C. J. Tang, G. Y. Tang, J. Tang, M. Tang, Y. A. Tang, L. Y. Tao, Q. T. Tao, M. Tat, J. X. Teng, V. Thoren, W. H. Tian, Y. Tian, Z. F. Tian, I. Uman, Y. Wan, S. J. Wang, B. Wang, B. L. Wang, Bo Wang, D. Y. Wang, F. Wang, H. J. Wang, J. J. Wang, J. P. Wang, K. Wang, L. L. Wang, M. Wang, N. Y. Wang, S. Wang, T. Wang, T. J. Wang, W. Wang, W. P. Wang, X. Wang, X. F. Wang, X. J. Wang, X. L. Wang, X. N. Wang, Y. Wang, Y. D. Wang, Y. F. Wang, Y. H. Wang, Y. L. Wang, Y. N. Wang, Y. Q. Wang, Yaqian Wang, Yi Wang, Z. Wang, Z. L. Wang, Z. Y. Wang, Ziyi Wang, D. H. Wei, F. Weidner, S. P. Wen, Y. R. Wen, U. Wiedner, G. Wilkinson, M. Wolke, L. Wollenberg, C. Wu, J. F. Wu, L. H. Wu, L. J. Wu, X. Wu, X. H. Wu, Y. Wu, Y. H. Wu, Y. J. Wu, Z. Wu, L. Xia, X. M. Xian, B. H. Xiang, T. Xiang, D. Xiao, G. Y. Xiao, S. Y. Xiao, Y. L. Xiao, Z. J. Xiao, C. Xie, X. H. Xie, Y. Xie, Y. G. Xie, Y. H. Xie, Z. P. Xie, T. Y. Xing, C. F. Xu, C. J. Xu, G. F. Xu, H. Y. Xu, M. Xu, Q. J. Xu, Q. N. Xu, W. Xu, W. L. Xu, X. P. Xu, Y. Xu, Y. C. Xu, Z. S. Xu, F. Yan, L. Yan, W. B. Yan, W. C. Yan, X. Q. Yan, H. J. Yang, H. L. Yang, H. X. Yang, J. H. Yang, T. Yang, Y. Yang, Y. F. Yang, Y. X. Yang, Z. W. Yang, Z. P. Yao, M. Ye, M. H. Ye, J. H. Yin, Junhao Yin, Z. Y. You, B. X. Yu, C. X. Yu, G. Yu, J. S. Yu, M. C. Yu, T. Yu, X. D. Yu, Y. C. Yu, C. Z. Yuan, J. Yuan, L. Yuan, S. C. Yuan, Y. Yuan, Z. Y. Yuan, C. X. Yue, A. A. Zafar, F. R. Zeng, S. H. Zeng, X. Zeng, Y. Zeng, Y. J. Zeng, X. Y. Zhai, Y. C. Zhai, Y. H. Zhan, A. Q. Zhang, B. L. Zhang, B. X. Zhang, D. H. Zhang, G. Y. Zhang, H. Zhang, H. C. Zhang, H. H. Zhang, H. Q. Zhang, H. R. Zhang, H. Y. Zhang, J. Zhang, J. J. Zhang, J. L. Zhang, J. Q. Zhang, J. S. Zhang, J. W. Zhang, J. X. Zhang, J. Y. Zhang, J. Z. Zhang, Jianyu Zhang, L. M. Zhang, Lei Zhang, P. Zhang, Q. Y. Zhang, R. Y. Zhang, S. H. Zhang, Shulei Zhang, X. M. Zhang, X. Y Zhang, X. Y. Zhang, Y. Zhang, Y. T. Zhang, Y. H. Zhang, Y. M. Zhang, Yan Zhang, Z. D. Zhang, Z. H. Zhang, Z. L. Zhang, Z. Y. Zhang, Z. Z. Zhang, G. Zhao, J. Y. Zhao, J. Z. Zhao, L. Zhao, Lei Zhao, M. G. Zhao, N. Zhao, R. P. Zhao, S. J. Zhao, Y. B. Zhao, Y. X. Zhao, Z. G. Zhao, A. Zhemchugov, B. Zheng, B. M. Zheng, J. P. Zheng, W. J. Zheng, Y. H. Zheng, B. Zhong, X. Zhong, H. Zhou, J. Y. Zhou, L. P. Zhou, S. Zhou, X. Zhou, X. K. Zhou, X. R. Zhou, X. Y. Zhou, Y. Z. Zhou, Z. C. Zhou, A. N. Zhu, J. Zhu, K. Zhu, K. J. Zhu, K. S. Zhu, L. Zhu, L. X. Zhu, S. H. Zhu, T. J. Zhu, W. D. Zhu, Y. C. Zhu, Z. A. Zhu, J. H. Zou, J. Zu
Format:	Article
Language:	English
Published:	SpringerOpen 2025-01-01
Series:	Journal of High Energy Physics
Subjects:	Branching fraction Charm Physics e +-e − Experiments Flavour Physics
Online Access:	https://doi.org/10.1007/JHEP01(2025)089
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_version_	1823863471969665024
author	The BESIII collaboration M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin X. Y. Chai J. F. Chang G. R. Che Y. Z. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Y. Y. Duan Z. H. Duan P. Egorov Y. H. Fan J. Fang J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao X. B. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia L. Ge P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han F. Hanisch X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu Q. P. Hu S. L. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang Y. S. Huang T. Hussain F. Hölzken N. Hüsken N. in der Wiesche J. Jackson S. Janchiv J. H. Jeong Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf M. Kuessner X. Kui N. Kumar A. Kupsc W. Kühn L. Lavezzi T. T. Lei Z. H. Lei M. Lellmann T. Lenz C. Li C. Li C. H. Li Cheng Li D. M. Li F. Li G. Li H. B. Li H. J. Li H. N. Li Hui Li J. R. Li J. S. Li K. Li K. L. Li L. J. Li L. K. Li Lei Li M. H. Li P. R. Li Q. M. Li Q. X. Li R. Li S. X. Li T. Li W. D. Li W. G. Li X. Li X. H. Li X. L. Li X. Y. Li X. Z. Li Y. G. Li Z. J. Li Z. Y. Li C. Liang H. Liang H. Liang Y. F. Liang Y. T. Liang G. R. Liao Y. P. Liao J. Libby A. Limphirat C. C. Lin C. X. Lin D. X. Lin T. Lin B. J. Liu B. X. Liu C. Liu C. X. Liu F. Liu F. H. Liu Feng Liu G. M. Liu H. Liu H. B. Liu H. H. Liu H. M. Liu Huihui Liu J. B. Liu J. Y. Liu K. Liu K. Y. Liu Ke Liu L. Liu L. C. Liu Lu Liu M. H. Liu P. L. Liu Q. Liu S. B. Liu T. Liu W. K. Liu W. M. Liu X. Liu X. Liu Y. Liu Y. Liu Y. B. Liu Z. A. Liu Z. D. Liu Z. Q. Liu X. C. Lou F. X. Lu H. J. Lu J. G. Lu X. L. Lu Y. Lu Y. P. Lu Z. H. Lu C. L. Luo J. R. Luo M. X. Luo T. Luo X. L. Luo X. R. Lyu Y. F. Lyu F. C. Ma H. Ma H. L. Ma J. L. Ma L. L. Ma L. R. Ma M. M. Ma Q. M. Ma R. Q. Ma T. Ma X. T. Ma X. Y. Ma Y. M. Ma F. E. Maas I. MacKay M. Maggiora S. Malde Y. J. Mao Z. P. Mao S. Marcello Z. X. Meng J. G. Messchendorp G. Mezzadri H. Miao T. J. Min R. E. Mitchell X. H. Mo B. Moses N. Yu. Muchnoi J. Muskalla Y. Nefedov F. Nerling L. S. Nie I. B. Nikolaev Z. Ning S. Nisar Q. L. Niu W. D. Niu Y. Niu S. L. Olsen S. L. Olsen Q. Ouyang S. Pacetti X. Pan Y. Pan A. Pathak Y. P. Pei M. Pelizaeus H. P. Peng Y. Y. Peng K. Peters J. L. Ping R. G. Ping S. Plura V. Prasad F. Z. Qi H. Qi H. R. Qi M. Qi T. Y. Qi S. Qian W. B. Qian C. F. Qiao X. K. Qiao J. J. Qin L. Q. Qin L. Y. Qin X. P. Qin X. S. Qin Z. H. Qin J. F. Qiu Z. H. Qu C. F. Redmer K. J. Ren A. Rivetti M. Rolo G. Rong Ch. Rosner M. Q. Ruan S. N. Ruan N. Salone A. Sarantsev Y. Schelhaas K. Schoenning M. Scodeggio K. Y. Shan W. Shan X. Y. Shan Z. J. Shang J. F. Shangguan L. G. Shao M. Shao C. P. Shen H. F. Shen W. H. Shen X. Y. Shen B. A. Shi H. Shi J. L. Shi J. Y. Shi Q. Q. Shi S. Y. Shi X. Shi J. J. Song T. Z. Song W. M. Song Y. J. Song Y. X. Song S. Sosio S. Spataro F. Stieler S. S Su Y. J. Su G. B. Sun G. X. Sun H. Sun H. K. Sun J. F. Sun K. Sun L. Sun S. S. Sun T. Sun W. Y. Sun Y. Sun Y. J. Sun Y. Z. Sun Z. Q. Sun Z. T. Sun C. J. Tang G. Y. Tang J. Tang M. Tang Y. A. Tang L. Y. Tao Q. T. Tao M. Tat J. X. Teng V. Thoren W. H. Tian Y. Tian Z. F. Tian I. Uman Y. Wan S. J. Wang B. Wang B. L. Wang Bo Wang D. Y. Wang F. Wang H. J. Wang J. J. Wang J. P. Wang K. Wang L. L. Wang M. Wang N. Y. Wang S. Wang S. Wang T. Wang T. J. Wang W. Wang W. Wang W. P. Wang X. Wang X. F. Wang X. J. Wang X. L. Wang X. N. Wang Y. Wang Y. D. Wang Y. F. Wang Y. H. Wang Y. L. Wang Y. N. Wang Y. Q. Wang Yaqian Wang Yi Wang Z. Wang Z. L. Wang Z. Y. Wang Ziyi Wang D. H. Wei F. Weidner S. P. Wen Y. R. Wen U. Wiedner G. Wilkinson M. Wolke L. Wollenberg C. Wu J. F. Wu L. H. Wu L. J. Wu X. Wu X. H. Wu Y. Wu Y. H. Wu Y. J. Wu Z. Wu L. Xia X. M. Xian B. H. Xiang T. Xiang D. Xiao G. Y. Xiao S. Y. Xiao Y. L. Xiao Z. J. Xiao C. Xie X. H. Xie Y. Xie Y. G. Xie Y. H. Xie Z. P. Xie T. Y. Xing C. F. Xu C. J. Xu G. F. Xu H. Y. Xu M. Xu Q. J. Xu Q. N. Xu W. Xu W. L. Xu X. P. Xu Y. Xu Y. C. Xu Z. S. Xu F. Yan L. Yan W. B. Yan W. C. Yan X. Q. Yan H. J. Yang H. L. Yang H. X. Yang J. H. Yang T. Yang Y. Yang Y. F. Yang Y. F. Yang Y. X. Yang Z. W. Yang Z. P. Yao M. Ye M. H. Ye J. H. Yin Junhao Yin Z. Y. You B. X. Yu C. X. Yu G. Yu J. S. Yu M. C. Yu T. Yu X. D. Yu Y. C. Yu C. Z. Yuan J. Yuan J. Yuan L. Yuan S. C. Yuan Y. Yuan Z. Y. Yuan C. X. Yue A. A. Zafar F. R. Zeng S. H. Zeng X. Zeng Y. Zeng Y. J. Zeng Y. J. Zeng X. Y. Zhai Y. C. Zhai Y. H. Zhan A. Q. Zhang B. L. Zhang B. X. Zhang D. H. Zhang G. Y. Zhang H. Zhang H. Zhang H. C. Zhang H. H. Zhang H. H. Zhang H. Q. Zhang H. R. Zhang H. Y. Zhang J. Zhang J. Zhang J. J. Zhang J. L. Zhang J. Q. Zhang J. S. Zhang J. W. Zhang J. X. Zhang J. Y. Zhang J. Z. Zhang Jianyu Zhang L. M. Zhang Lei Zhang P. Zhang Q. Y. Zhang R. Y. Zhang S. H. Zhang Shulei Zhang X. M. Zhang X. Y Zhang X. Y. Zhang Y. Zhang Y. Zhang Y. T. Zhang Y. H. Zhang Y. M. Zhang Yan Zhang Z. D. Zhang Z. H. Zhang Z. L. Zhang Z. Y. Zhang Z. Y. Zhang Z. Z. Zhang G. Zhao J. Y. Zhao J. Z. Zhao L. Zhao Lei Zhao M. G. Zhao N. Zhao R. P. Zhao S. J. Zhao Y. B. Zhao Y. X. Zhao Z. G. Zhao A. Zhemchugov B. Zheng B. M. Zheng J. P. Zheng W. J. Zheng Y. H. Zheng B. Zhong X. Zhong H. Zhou J. Y. Zhou L. P. Zhou S. Zhou X. Zhou X. K. Zhou X. R. Zhou X. Y. Zhou Y. Z. Zhou Z. C. Zhou A. N. Zhu J. Zhu K. Zhu K. J. Zhu K. S. Zhu L. Zhu L. X. Zhu S. H. Zhu T. J. Zhu W. D. Zhu Y. C. Zhu Z. A. Zhu J. H. Zou J. Zu
author_facet	The BESIII collaboration M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin X. Y. Chai J. F. Chang G. R. Che Y. Z. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Y. Y. Duan Z. H. Duan P. Egorov Y. H. Fan J. Fang J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. Felici C. Q. Feng J. H. Feng Y. T. Feng M. Fritsch C. D. Fu J. L. Fu Y. W. Fu H. Gao X. B. Gao Y. N. Gao Yang Gao S. Garbolino I. Garzia L. Ge P. T. Ge Z. W. Ge C. Geng E. M. Gersabeck A. Gilman K. Goetzen L. Gong W. X. Gong W. Gradl S. Gramigna M. Greco M. H. Gu Y. T. Gu C. Y. Guan A. Q. Guo L. B. Guo M. J. Guo R. P. Guo Y. P. Guo A. Guskov J. Gutierrez K. L. Han T. T. Han F. Hanisch X. Q. Hao F. A. Harris K. K. He K. L. He F. H. Heinsius C. H. Heinz Y. K. Heng C. Herold T. Holtmann P. C. Hong G. Y. Hou X. T. Hou Y. R. Hou Z. L. Hou B. Y. Hu H. M. Hu J. F. Hu Q. P. Hu S. L. Hu T. Hu Y. Hu G. S. Huang K. X. Huang L. Q. Huang X. T. Huang Y. P. Huang Y. S. Huang T. Hussain F. Hölzken N. Hüsken N. in der Wiesche J. Jackson S. Janchiv J. H. Jeong Q. Ji Q. P. Ji W. Ji X. B. Ji X. L. Ji Y. Y. Ji X. Q. Jia Z. K. Jia D. Jiang H. B. Jiang P. C. Jiang S. S. Jiang T. J. Jiang X. S. Jiang Y. Jiang J. B. Jiao J. K. Jiao Z. Jiao S. Jin Y. Jin M. Q. Jing X. M. Jing T. Johansson S. Kabana N. Kalantar-Nayestanaki X. L. Kang X. S. Kang M. Kavatsyuk B. C. Ke V. Khachatryan A. Khoukaz R. Kiuchi O. B. Kolcu B. Kopf M. Kuessner X. Kui N. Kumar A. Kupsc W. Kühn L. Lavezzi T. T. Lei Z. H. Lei M. Lellmann T. Lenz C. Li C. Li C. H. Li Cheng Li D. M. Li F. Li G. Li H. B. Li H. J. Li H. N. Li Hui Li J. R. Li J. S. Li K. Li K. L. Li L. J. Li L. K. Li Lei Li M. H. Li P. R. Li Q. M. Li Q. X. Li R. Li S. X. Li T. Li W. D. Li W. G. Li X. Li X. H. Li X. L. Li X. Y. Li X. Z. Li Y. G. Li Z. J. Li Z. Y. Li C. Liang H. Liang H. Liang Y. F. Liang Y. T. Liang G. R. Liao Y. P. Liao J. Libby A. Limphirat C. C. Lin C. X. Lin D. X. Lin T. Lin B. J. Liu B. X. Liu C. Liu C. X. Liu F. Liu F. H. Liu Feng Liu G. M. Liu H. Liu H. B. Liu H. H. Liu H. M. Liu Huihui Liu J. B. Liu J. Y. Liu K. Liu K. Y. Liu Ke Liu L. Liu L. C. Liu Lu Liu M. H. Liu P. L. Liu Q. Liu S. B. Liu T. Liu W. K. Liu W. M. Liu X. Liu X. Liu Y. Liu Y. Liu Y. B. Liu Z. A. Liu Z. D. Liu Z. Q. Liu X. C. Lou F. X. Lu H. J. Lu J. G. Lu X. L. Lu Y. Lu Y. P. Lu Z. H. Lu C. L. Luo J. R. Luo M. X. Luo T. Luo X. L. Luo X. R. Lyu Y. F. Lyu F. C. Ma H. Ma H. L. Ma J. L. Ma L. L. Ma L. R. Ma M. M. Ma Q. M. Ma R. Q. Ma T. Ma X. T. Ma X. Y. Ma Y. M. Ma F. E. Maas I. MacKay M. Maggiora S. Malde Y. J. Mao Z. P. Mao S. Marcello Z. X. Meng J. G. Messchendorp G. Mezzadri H. Miao T. J. Min R. E. Mitchell X. H. Mo B. Moses N. Yu. Muchnoi J. Muskalla Y. Nefedov F. Nerling L. S. Nie I. B. Nikolaev Z. Ning S. Nisar Q. L. Niu W. D. Niu Y. Niu S. L. Olsen S. L. Olsen Q. Ouyang S. Pacetti X. Pan Y. Pan A. Pathak Y. P. Pei M. Pelizaeus H. P. Peng Y. Y. Peng K. Peters J. L. Ping R. G. Ping S. Plura V. Prasad F. Z. Qi H. Qi H. R. Qi M. Qi T. Y. Qi S. Qian W. B. Qian C. F. Qiao X. K. Qiao J. J. Qin L. Q. Qin L. Y. Qin X. P. Qin X. S. Qin Z. H. Qin J. F. Qiu Z. H. Qu C. F. Redmer K. J. Ren A. Rivetti M. Rolo G. Rong Ch. Rosner M. Q. Ruan S. N. Ruan N. Salone A. Sarantsev Y. Schelhaas K. Schoenning M. Scodeggio K. Y. Shan W. Shan X. Y. Shan Z. J. Shang J. F. Shangguan L. G. Shao M. Shao C. P. Shen H. F. Shen W. H. Shen X. Y. Shen B. A. Shi H. Shi J. L. Shi J. Y. Shi Q. Q. Shi S. Y. Shi X. Shi J. J. Song T. Z. Song W. M. Song Y. J. Song Y. X. Song S. Sosio S. Spataro F. Stieler S. S Su Y. J. Su G. B. Sun G. X. Sun H. Sun H. K. Sun J. F. Sun K. Sun L. Sun S. S. Sun T. Sun W. Y. Sun Y. Sun Y. J. Sun Y. Z. Sun Z. Q. Sun Z. T. Sun C. J. Tang G. Y. Tang J. Tang M. Tang Y. A. Tang L. Y. Tao Q. T. Tao M. Tat J. X. Teng V. Thoren W. H. Tian Y. Tian Z. F. Tian I. Uman Y. Wan S. J. Wang B. Wang B. L. Wang Bo Wang D. Y. Wang F. Wang H. J. Wang J. J. Wang J. P. Wang K. Wang L. L. Wang M. Wang N. Y. Wang S. Wang S. Wang T. Wang T. J. Wang W. Wang W. Wang W. P. Wang X. Wang X. F. Wang X. J. Wang X. L. Wang X. N. Wang Y. Wang Y. D. Wang Y. F. Wang Y. H. Wang Y. L. Wang Y. N. Wang Y. Q. Wang Yaqian Wang Yi Wang Z. Wang Z. L. Wang Z. Y. Wang Ziyi Wang D. H. Wei F. Weidner S. P. Wen Y. R. Wen U. Wiedner G. Wilkinson M. Wolke L. Wollenberg C. Wu J. F. Wu L. H. Wu L. J. Wu X. Wu X. H. Wu Y. Wu Y. H. Wu Y. J. Wu Z. Wu L. Xia X. M. Xian B. H. Xiang T. Xiang D. Xiao G. Y. Xiao S. Y. Xiao Y. L. Xiao Z. J. Xiao C. Xie X. H. Xie Y. Xie Y. G. Xie Y. H. Xie Z. P. Xie T. Y. Xing C. F. Xu C. J. Xu G. F. Xu H. Y. Xu M. Xu Q. J. Xu Q. N. Xu W. Xu W. L. Xu X. P. Xu Y. Xu Y. C. Xu Z. S. Xu F. Yan L. Yan W. B. Yan W. C. Yan X. Q. Yan H. J. Yang H. L. Yang H. X. Yang J. H. Yang T. Yang Y. Yang Y. F. Yang Y. F. Yang Y. X. Yang Z. W. Yang Z. P. Yao M. Ye M. H. Ye J. H. Yin Junhao Yin Z. Y. You B. X. Yu C. X. Yu G. Yu J. S. Yu M. C. Yu T. Yu X. D. Yu Y. C. Yu C. Z. Yuan J. Yuan J. Yuan L. Yuan S. C. Yuan Y. Yuan Z. Y. Yuan C. X. Yue A. A. Zafar F. R. Zeng S. H. Zeng X. Zeng Y. Zeng Y. J. Zeng Y. J. Zeng X. Y. Zhai Y. C. Zhai Y. H. Zhan A. Q. Zhang B. L. Zhang B. X. Zhang D. H. Zhang G. Y. Zhang H. Zhang H. Zhang H. C. Zhang H. H. Zhang H. H. Zhang H. Q. Zhang H. R. Zhang H. Y. Zhang J. Zhang J. Zhang J. J. Zhang J. L. Zhang J. Q. Zhang J. S. Zhang J. W. Zhang J. X. Zhang J. Y. Zhang J. Z. Zhang Jianyu Zhang L. M. Zhang Lei Zhang P. Zhang Q. Y. Zhang R. Y. Zhang S. H. Zhang Shulei Zhang X. M. Zhang X. Y Zhang X. Y. Zhang Y. Zhang Y. Zhang Y. T. Zhang Y. H. Zhang Y. M. Zhang Yan Zhang Z. D. Zhang Z. H. Zhang Z. L. Zhang Z. Y. Zhang Z. Y. Zhang Z. Z. Zhang G. Zhao J. Y. Zhao J. Z. Zhao L. Zhao Lei Zhao M. G. Zhao N. Zhao R. P. Zhao S. J. Zhao Y. B. Zhao Y. X. Zhao Z. G. Zhao A. Zhemchugov B. Zheng B. M. Zheng J. P. Zheng W. J. Zheng Y. H. Zheng B. Zhong X. Zhong H. Zhou J. Y. Zhou L. P. Zhou S. Zhou X. Zhou X. K. Zhou X. R. Zhou X. Y. Zhou Y. Z. Zhou Z. C. Zhou A. N. Zhu J. Zhu K. Zhu K. J. Zhu K. S. Zhu L. Zhu L. X. Zhu S. H. Zhu T. J. Zhu W. D. Zhu Y. C. Zhu Z. A. Zhu J. H. Zou J. Zu
author_sort	The BESIII collaboration
collection	DOAJ
description	Abstract By analyzing e + e − collision data with an integrated luminosity of 7.9 fb −1 collected with the BESIII detector at the center-of-mass energy of 3.773 GeV, the branching fraction of D + → τ + ν τ is determined as B $$ \mathcal{B} $$ = (9.9 ± 1.1stat ± 0.5syst) × 10 −4. Using the most precise result B $$ \mathcal{B} $$ (D + → μ + ν μ ) = (3.981 ± 0.079stat ± 0.040syst) × 10 −4 [1], we determine R τ/μ = Γ(D + → τ + ν τ )/Γ(D + → μ + ν μ ) = 2.49 ± 0.31, achieving a factor of two improvement in precision compared to the previous BESIII result. This measurement is in agreement with the standard model prediction of lepton flavor universality within one standard deviation.
format	Article
id	doaj-art-86348fab266e43c0948b43a24b532b3a
institution	Kabale University
issn	1029-8479
language	English
publishDate	2025-01-01
publisher	SpringerOpen
record_format	Article
series	Journal of High Energy Physics
spelling	doaj-art-86348fab266e43c0948b43a24b532b3a2025-02-09T12:07:25ZengSpringerOpenJournal of High Energy Physics1029-84792025-01-012025111610.1007/JHEP01(2025)089Measurement of the branching fraction of D + → τ + ν τThe BESIII collaborationM. Ablikim0M. N. Achasov1P. Adlarson2O. Afedulidis3X. C. Ai4R. Aliberti5A. Amoroso6Y. Bai7O. Bakina8I. Balossino9Y. Ban10H.-R. Bao11V. Batozskaya12K. Begzsuren13N. Berger14M. Berlowski15M. Bertani16D. Bettoni17F. Bianchi18E. Bianco19A. Bortone20I. Boyko21R. A. Briere22A. Brueggemann23H. Cai24X. Cai25A. Calcaterra26G. F. Cao27N. Cao28S. A. Cetin29X. Y. Chai30J. F. Chang31G. R. Che32Y. Z. Che33G. Chelkov34C. Chen35C. H. Chen36Chao Chen37G. Chen38H. S. Chen39H. Y. Chen40M. L. Chen41S. J. Chen42S. L. Chen43S. M. Chen44T. Chen45X. R. Chen46X. T. Chen47Y. B. Chen48Y. Q. Chen49Z. J. Chen50Z. Y. Chen51S. K. Choi52G. Cibinetto53F. Cossio54J. J. Cui55H. L. Dai56J. P. Dai57A. Dbeyssi58R. E. de Boer59D. Dedovich60C. Q. Deng61Z. Y. Deng62A. Denig63I. Denysenko64M. Destefanis65F. De Mori66B. Ding67X. X. Ding68Y. Ding69Y. Ding70J. Dong71L. Y. Dong72M. Y. Dong73X. Dong74M. C. Du75S. X. Du76Y. Y. Duan77Z. H. Duan78P. Egorov79Y. H. Fan80J. Fang81J. Fang82S. S. Fang83W. X. Fang84Y. Fang85Y. Q. Fang86R. Farinelli87L. Fava88F. Feldbauer89G. Felici90C. Q. Feng91J. H. Feng92Y. T. Feng93M. Fritsch94C. D. Fu95J. L. Fu96Y. W. Fu97H. Gao98X. B. Gao99Y. N. Gao100Yang Gao101S. Garbolino102I. Garzia103L. Ge104P. T. Ge105Z. W. Ge106C. Geng107E. M. Gersabeck108A. Gilman109K. Goetzen110L. Gong111W. X. Gong112W. Gradl113S. Gramigna114M. Greco115M. H. Gu116Y. T. Gu117C. Y. Guan118A. Q. Guo119L. B. Guo120M. J. Guo121R. P. Guo122Y. P. Guo123A. Guskov124J. Gutierrez125K. L. Han126T. T. Han127F. Hanisch128X. Q. Hao129F. A. Harris130K. K. He131K. L. He132F. H. Heinsius133C. H. Heinz134Y. K. Heng135C. Herold136T. Holtmann137P. C. Hong138G. Y. Hou139X. T. Hou140Y. R. Hou141Z. L. Hou142B. Y. Hu143H. M. Hu144J. F. Hu145Q. P. Hu146S. L. Hu147T. Hu148Y. Hu149G. S. Huang150K. X. Huang151L. Q. Huang152X. T. Huang153Y. P. Huang154Y. S. Huang155T. Hussain156F. Hölzken157N. Hüsken158N. in der Wiesche159J. Jackson160S. Janchiv161J. H. Jeong162Q. Ji163Q. P. Ji164W. Ji165X. B. Ji166X. L. Ji167Y. Y. Ji168X. Q. Jia169Z. K. Jia170D. Jiang171H. B. Jiang172P. C. Jiang173S. S. Jiang174T. J. Jiang175X. S. Jiang176Y. Jiang177J. B. Jiao178J. K. Jiao179Z. Jiao180S. Jin181Y. Jin182M. Q. Jing183X. M. Jing184T. Johansson185S. Kabana186N. Kalantar-Nayestanaki187X. L. Kang188X. S. Kang189M. Kavatsyuk190B. C. Ke191V. Khachatryan192A. Khoukaz193R. Kiuchi194O. B. Kolcu195B. Kopf196M. Kuessner197X. Kui198N. Kumar199A. Kupsc200W. Kühn201L. Lavezzi202T. T. Lei203Z. H. Lei204M. Lellmann205T. Lenz206C. Li207C. Li208C. H. Li209Cheng Li210D. M. Li211F. Li212G. Li213H. B. Li214H. J. Li215H. N. Li216Hui Li217J. R. Li218J. S. Li219K. Li220K. L. Li221L. J. Li222L. K. Li223Lei Li224M. H. Li225P. R. Li226Q. M. Li227Q. X. Li228R. Li229S. X. Li230T. Li231W. D. Li232W. G. Li233X. 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Mao323Z. P. Mao324S. Marcello325Z. X. Meng326J. G. Messchendorp327G. Mezzadri328H. Miao329T. J. Min330R. E. Mitchell331X. H. Mo332B. Moses333N. Yu. Muchnoi334J. Muskalla335Y. Nefedov336F. Nerling337L. S. Nie338I. B. Nikolaev339Z. Ning340S. Nisar341Q. L. Niu342W. D. Niu343Y. Niu344S. L. Olsen345S. L. Olsen346Q. Ouyang347S. Pacetti348X. Pan349Y. Pan350A. Pathak351Y. P. Pei352M. Pelizaeus353H. P. Peng354Y. Y. Peng355K. Peters356J. L. Ping357R. G. Ping358S. Plura359V. Prasad360F. Z. Qi361H. Qi362H. R. Qi363M. Qi364T. Y. Qi365S. Qian366W. B. Qian367C. F. Qiao368X. K. Qiao369J. J. Qin370L. Q. Qin371L. Y. Qin372X. P. Qin373X. S. Qin374Z. H. Qin375J. F. Qiu376Z. H. Qu377C. F. Redmer378K. J. Ren379A. Rivetti380M. Rolo381G. Rong382Ch. Rosner383M. Q. Ruan384S. N. Ruan385N. Salone386A. Sarantsev387Y. Schelhaas388K. Schoenning389M. Scodeggio390K. Y. Shan391W. Shan392X. Y. Shan393Z. J. Shang394J. F. Shangguan395L. G. Shao396M. Shao397C. P. Shen398H. F. Shen399W. H. Shen400X. Y. Shen401B. A. 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Weidner488S. P. Wen489Y. R. Wen490U. Wiedner491G. Wilkinson492M. Wolke493L. Wollenberg494C. Wu495J. F. Wu496L. H. Wu497L. J. Wu498X. Wu499X. H. Wu500Y. Wu501Y. H. Wu502Y. J. Wu503Z. Wu504L. Xia505X. M. Xian506B. H. Xiang507T. Xiang508D. Xiao509G. Y. Xiao510S. Y. Xiao511Y. L. Xiao512Z. J. Xiao513C. Xie514X. H. Xie515Y. Xie516Y. G. Xie517Y. H. Xie518Z. P. Xie519T. Y. Xing520C. F. Xu521C. J. Xu522G. F. Xu523H. Y. Xu524M. Xu525Q. J. Xu526Q. N. Xu527W. Xu528W. L. Xu529X. P. Xu530Y. Xu531Y. C. Xu532Z. S. Xu533F. Yan534L. Yan535W. B. Yan536W. C. Yan537X. Q. Yan538H. J. Yang539H. L. Yang540H. X. Yang541J. H. Yang542T. Yang543Y. Yang544Y. F. Yang545Y. F. Yang546Y. X. Yang547Z. W. Yang548Z. P. Yao549M. Ye550M. H. Ye551J. H. Yin552Junhao Yin553Z. Y. You554B. X. Yu555C. X. Yu556G. Yu557J. S. Yu558M. C. Yu559T. Yu560X. D. Yu561Y. C. Yu562C. Z. Yuan563J. Yuan564J. Yuan565L. Yuan566S. C. Yuan567Y. Yuan568Z. Y. Yuan569C. X. Yue570A. A. Zafar571F. R. Zeng572S. H. Zeng573X. Zeng574Y. Zeng575Y. J. 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Zhou652X. R. Zhou653X. Y. Zhou654Y. Z. Zhou655Z. C. Zhou656A. N. Zhu657J. Zhu658K. Zhu659K. J. Zhu660K. S. Zhu661L. Zhu662L. X. Zhu663S. H. Zhu664T. J. Zhu665W. D. Zhu666Y. C. Zhu667Z. A. Zhu668J. H. Zou669J. Zu670Institute of High Energy PhysicsBudker Institute of Nuclear Physics SB RAS (BINP)Uppsala UniversityBochum Ruhr-UniversityZhengzhou UniversityJohannes Gutenberg University of MainzUniversity of TurinSoutheast UniversityJoint Institute for Nuclear ResearchINFN Sezione di FerraraPeking UniversityUniversity of Chinese Academy of SciencesInstitute of High Energy PhysicsInstitute of Physics and TechnologyJohannes Gutenberg University of MainzNational Centre for Nuclear ResearchINFN Laboratori Nazionali di FrascatiINFN Sezione di FerraraUniversity of TurinUniversity of TurinUniversity of TurinJoint Institute for Nuclear ResearchCarnegie Mellon UniversityUniversity of MuensterWuhan UniversityInstitute of High Energy PhysicsINFN Laboratori Nazionali di FrascatiInstitute of High Energy PhysicsInstitute of High Energy PhysicsTurkish Accelerator Center Particle Factory Group, Istinye UniversityPeking UniversityInstitute of High Energy PhysicsNankai UniversityInstitute of High Energy 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PhysicsSouth China Normal UniversityUniversity of Science and Technology of ChinaFudan UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaSun Yat-Sen UniversityInstitute of Modern PhysicsShandong UniversityInstitute of High Energy PhysicsSun Yat-Sen UniversityUniversity of the PunjabBochum Ruhr-UniversityJohannes Gutenberg University of MainzUniversity of MuensterIndiana UniversityInstitute of Physics and TechnologyChung-Ang UniversityInstitute of High Energy PhysicsHenan Normal UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsShandong UniversityShandong UniversityUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsWuhan UniversityPeking UniversityLiaoning Normal UniversityHangzhou Normal UniversityInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesShandong UniversityJilin UniversityHuangshan CollegeNanjing 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Physikalisches InstitutUniversity of TurinUniversity of Science and Technology of ChinaUniversity of Science and Technology of ChinaJohannes Gutenberg University of MainzJohannes Gutenberg University of MainzQufu Normal UniversityNankai UniversityLiaoning Normal UniversityUniversity of Science and Technology of ChinaZhengzhou UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsHenan Normal UniversitySouth China Normal UniversityNankai UniversityTsinghua UniversitySun Yat-Sen UniversityInstitute of High Energy PhysicsHenan Normal UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsRenmin University of ChinaNankai UniversityLanzhou UniversityInstitute of High Energy PhysicsShandong UniversityHebei UniversityFudan UniversityShandong UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaShandong UniversityInstitute of 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Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of Modern PhysicsHelmholtz Institute MainzUniversity of OxfordUniversity of TurinUniversity of OxfordPeking UniversityInstitute of High Energy PhysicsUniversity of TurinUniversity of JinanGSI Helmholtzcentre for Heavy Ion Research GmbHINFN Sezione di FerraraInstitute of High Energy PhysicsNanjing UniversityIndiana UniversityInstitute of High Energy PhysicsIndiana UniversityBudker Institute of Nuclear Physics SB RAS (BINP)Johannes Gutenberg University of MainzJoint Institute for Nuclear ResearchHelmholtz Institute MainzHenan UniversityBudker Institute of Nuclear Physics SB RAS (BINP)Institute of High Energy PhysicsCOMSATS University Islamabad, Lahore CampusLanzhou UniversitySoochow UniversityShandong UniversityUniversity of Chinese Academy of SciencesChung-Ang UniversityInstitute of High Energy PhysicsINFN Sezione di PerugiaSoochow UniversitySoutheast UniversityJilin UniversityUniversity of Science and Technology of ChinaBochum Ruhr-UniversityUniversity of Science and Technology of ChinaLanzhou UniversityGSI Helmholtzcentre for Heavy Ion Research GmbHNanjing Normal UniversityInstitute of High Energy PhysicsJohannes Gutenberg University of MainzInstituto de Alta Investigación, Universidad de TarapacáInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaTsinghua UniversityNanjing UniversityFudan UniversityInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesUniversity of Chinese Academy of SciencesZhengzhou UniversityUniversity of South ChinaGuangxi Normal UniversityUniversity of Science and Technology of ChinaFudan UniversityShandong UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of South ChinaJohannes Gutenberg University of MainzLiaoning Normal UniversityINFNINFNInstitute of High Energy PhysicsHelmholtz Institute MainzInstitute of High Energy PhysicsNankai UniversityNational Centre for Nuclear ResearchJoint Institute for Nuclear ResearchJohannes Gutenberg University of MainzUppsala UniversityINFN Sezione di FerraraFudan UniversityHunan Normal UniversityUniversity of Science and Technology of ChinaLanzhou UniversityHangzhou Normal UniversityInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaFudan UniversityInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesUniversity of Science and Technology of ChinaFudan UniversityInstitute of High Energy PhysicsSoochow UniversityUniversity of South ChinaInstitute of High Energy PhysicsHenan Normal UniversitySun Yat-Sen UniversityJilin UniversityFudan UniversityPeking UniversityUniversity of TurinUniversity of TurinJohannes Gutenberg University of MainzLiaoning UniversityUniversity of Chinese Academy of 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UniversityWuhan UniversityShandong UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsShandong UniversityUniversity of Chinese Academy of SciencesFudan UniversityLanzhou UniversityFudan UniversityNankai UniversitySun Yat-Sen UniversityUniversity of South ChinaHelmholtz Institute MainzPeking UniversityLanzhou UniversityLiaoning Normal UniversityFudan UniversityInstitute of High Energy PhysicsTsinghua UniversityNorth China Electric Power UniversityInstitute of High Energy PhysicsLanzhou UniversityHenan Normal UniversityNorth China Electric Power UniversityInstitute of High Energy PhysicsHebei UniversityTsinghua UniversityInstitute of High Energy PhysicsUniversity of South ChinaInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesGuangxi Normal UniversityUniversity of MuensterInstitute of High Energy PhysicsLiaoning Normal UniversityBochum Ruhr-UniversityUniversity of OxfordUppsala UniversityBochum Ruhr-UniversityLiaoning Normal UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsFudan UniversityJilin UniversityUniversity of Science and Technology of ChinaSoochow UniversityInstitute of Modern PhysicsInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaLiaoning Normal UniversityInstitute of High Energy PhysicsPeking UniversityLanzhou UniversityNanjing UniversityInstitute of High Energy PhysicsFudan UniversityNanjing Normal UniversityNanjing UniversityPeking UniversityShandong UniversityInstitute of High Energy PhysicsCentral China Normal UniversityUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsInstitute of High Energy PhysicsSun Yat-Sen UniversityInstitute of High Energy PhysicsUniversity of JinanUniversity of Science and Technology of ChinaHangzhou Normal UniversityInner Mongolia UniversityInstitute of High Energy PhysicsUniversity of JinanSoochow UniversityLiaoning UniversityYantai UniversityUniversity of Chinese Academy of SciencesFudan UniversityFudan UniversityUniversity of Science and Technology of ChinaZhengzhou UniversityInstitute of High Energy PhysicsShanghai Jiao Tong UniversityJilin UniversityInstitute of High Energy PhysicsNanjing UniversityInstitute of High Energy PhysicsFudan UniversityInstitute of High Energy PhysicsNankai UniversityInstitute of High Energy PhysicsLanzhou UniversityShandong UniversityInstitute of High Energy PhysicsChina Center of Advanced Science and TechnologyInstitute of High Energy PhysicsNankai UniversitySun Yat-Sen UniversityInstitute of High Energy PhysicsNankai UniversityInstitute of High Energy PhysicsHunan UniversityLiaoning UniversityUniversity of South ChinaPeking UniversityZhengzhou UniversityInstitute of High Energy PhysicsJilin UniversityNorth China Electric Power UniversityBeihang UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsSun Yat-Sen UniversityLiaoning Normal UniversityUniversity of the PunjabShandong UniversityUniversity of Bristol, H H Wills Physics LaboratoryFudan UniversityHunan UniversityInstitute of High Energy PhysicsSun Yat-Sen UniversityJilin UniversityShandong UniversitySun Yat-Sen UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsNankai UniversityHenan Normal UniversityZhengzhou UniversityUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsSun Yat-Sen UniversityJilin UniversityInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsZhengzhou UniversitySun Yat-Sen UniversityShanxi Normal UniversityHenan UniversityNanjing Normal UniversityFudan UniversityInstitute of High Energy PhysicsLanzhou UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesTsinghua UniversityNanjing UniversityInstitute of High Energy PhysicsJilin UniversityLanzhou UniversityInstitute of High Energy PhysicsHunan UniversityInstitute of High Energy PhysicsLiaoning UniversityShandong UniversityInstitute of High Energy PhysicsUniversity of South ChinaZhengzhou UniversityInstitute of High Energy PhysicsLiaoning Normal UniversityUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsInstitute of High Energy PhysicsJilin UniversityWuhan UniversityNankai UniversityNorth China Electric Power UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaNankai UniversityYunnan UniversityUniversity of Chinese Academy of SciencesZhengzhou UniversityInstitute of High Energy PhysicsInstitute of Modern PhysicsUniversity of Science and Technology of ChinaJoint Institute for Nuclear ResearchUniversity of South ChinaJilin UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Chinese Academy of SciencesNanjing Normal UniversitySun Yat-Sen UniversityShandong UniversityJilin UniversityInstitute of High Energy PhysicsCentral China Normal UniversityWuhan UniversityCentral China Normal UniversityUniversity of Science and Technology of ChinaLiaoning Normal UniversityFudan UniversityHenan UniversityUniversity of Chinese Academy of SciencesNankai UniversityInstitute of High Energy PhysicsInstitute of High Energy PhysicsFudan UniversityJilin UniversityUniversity of Chinese Academy of SciencesUniversity of Science and Technology LiaoningFudan UniversityNanjing Normal UniversityUniversity of Science and Technology of ChinaInstitute of High Energy PhysicsInstitute of High Energy PhysicsUniversity of Science and Technology of ChinaAbstract By analyzing e + e − collision data with an integrated luminosity of 7.9 fb −1 collected with the BESIII detector at the center-of-mass energy of 3.773 GeV, the branching fraction of D + → τ + ν τ is determined as B $$ \mathcal{B} $$ = (9.9 ± 1.1stat ± 0.5syst) × 10 −4. Using the most precise result B $$ \mathcal{B} $$ (D + → μ + ν μ ) = (3.981 ± 0.079stat ± 0.040syst) × 10 −4 [1], we determine R τ/μ = Γ(D + → τ + ν τ )/Γ(D + → μ + ν μ ) = 2.49 ± 0.31, achieving a factor of two improvement in precision compared to the previous BESIII result. This measurement is in agreement with the standard model prediction of lepton flavor universality within one standard deviation.https://doi.org/10.1007/JHEP01(2025)089Branching fractionCharm Physicse +-e − ExperimentsFlavour Physics
spellingShingle	The BESIII collaboration M. Ablikim M. N. Achasov P. Adlarson O. Afedulidis X. C. Ai R. Aliberti A. Amoroso Y. Bai O. Bakina I. Balossino Y. Ban H.-R. Bao V. Batozskaya K. Begzsuren N. Berger M. Berlowski M. Bertani D. Bettoni F. Bianchi E. Bianco A. Bortone I. Boyko R. A. Briere A. Brueggemann H. Cai X. Cai A. Calcaterra G. F. Cao N. Cao S. A. Cetin X. Y. Chai J. F. Chang G. R. Che Y. Z. Che G. Chelkov C. Chen C. H. Chen Chao Chen G. Chen H. S. Chen H. Y. Chen M. L. Chen S. J. Chen S. L. Chen S. M. Chen T. Chen X. R. Chen X. T. Chen Y. B. Chen Y. Q. Chen Z. J. Chen Z. Y. Chen S. K. Choi G. Cibinetto F. Cossio J. J. Cui H. L. Dai J. P. Dai A. Dbeyssi R. E. de Boer D. Dedovich C. Q. Deng Z. Y. Deng A. Denig I. Denysenko M. Destefanis F. De Mori B. Ding X. X. Ding Y. Ding Y. Ding J. Dong L. Y. Dong M. Y. Dong X. Dong M. C. Du S. X. Du Y. Y. Duan Z. H. Duan P. Egorov Y. H. Fan J. Fang J. Fang S. S. Fang W. X. Fang Y. Fang Y. Q. Fang R. Farinelli L. Fava F. Feldbauer G. 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Zhang J. W. Zhang J. X. Zhang J. Y. Zhang J. Z. Zhang Jianyu Zhang L. M. Zhang Lei Zhang P. Zhang Q. Y. Zhang R. Y. Zhang S. H. Zhang Shulei Zhang X. M. Zhang X. Y Zhang X. Y. Zhang Y. Zhang Y. Zhang Y. T. Zhang Y. H. Zhang Y. M. Zhang Yan Zhang Z. D. Zhang Z. H. Zhang Z. L. Zhang Z. Y. Zhang Z. Y. Zhang Z. Z. Zhang G. Zhao J. Y. Zhao J. Z. Zhao L. Zhao Lei Zhao M. G. Zhao N. Zhao R. P. Zhao S. J. Zhao Y. B. Zhao Y. X. Zhao Z. G. Zhao A. Zhemchugov B. Zheng B. M. Zheng J. P. Zheng W. J. Zheng Y. H. Zheng B. Zhong X. Zhong H. Zhou J. Y. Zhou L. P. Zhou S. Zhou X. Zhou X. K. Zhou X. R. Zhou X. Y. Zhou Y. Z. Zhou Z. C. Zhou A. N. Zhu J. Zhu K. Zhu K. J. Zhu K. S. Zhu L. Zhu L. X. Zhu S. H. Zhu T. J. Zhu W. D. Zhu Y. C. Zhu Z. A. Zhu J. H. Zou J. Zu Measurement of the branching fraction of D + → τ + ν τ Journal of High Energy Physics Branching fraction Charm Physics e +-e − Experiments Flavour Physics
title	Measurement of the branching fraction of D + → τ + ν τ
title_full	Measurement of the branching fraction of D + → τ + ν τ
title_fullStr	Measurement of the branching fraction of D + → τ + ν τ
title_full_unstemmed	Measurement of the branching fraction of D + → τ + ν τ
title_short	Measurement of the branching fraction of D + → τ + ν τ
title_sort	measurement of the branching fraction of d τ ν τ
topic	Branching fraction Charm Physics e +-e − Experiments Flavour Physics
url	https://doi.org/10.1007/JHEP01(2025)089
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measurementofthebranchingfractionofdtnt AT ywang measurementofthebranchingfractionofdtnt AT ydwang measurementofthebranchingfractionofdtnt AT yfwang measurementofthebranchingfractionofdtnt AT yhwang measurementofthebranchingfractionofdtnt AT ylwang measurementofthebranchingfractionofdtnt AT ynwang measurementofthebranchingfractionofdtnt AT yqwang measurementofthebranchingfractionofdtnt AT yaqianwang measurementofthebranchingfractionofdtnt AT yiwang measurementofthebranchingfractionofdtnt AT zwang measurementofthebranchingfractionofdtnt AT zlwang measurementofthebranchingfractionofdtnt AT zywang measurementofthebranchingfractionofdtnt AT ziyiwang measurementofthebranchingfractionofdtnt AT dhwei measurementofthebranchingfractionofdtnt AT fweidner measurementofthebranchingfractionofdtnt AT spwen measurementofthebranchingfractionofdtnt AT yrwen measurementofthebranchingfractionofdtnt AT uwiedner measurementofthebranchingfractionofdtnt AT gwilkinson measurementofthebranchingfractionofdtnt 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hyzhang measurementofthebranchingfractionofdtnt AT jzhang measurementofthebranchingfractionofdtnt AT jzhang measurementofthebranchingfractionofdtnt AT jjzhang measurementofthebranchingfractionofdtnt AT jlzhang measurementofthebranchingfractionofdtnt AT jqzhang measurementofthebranchingfractionofdtnt AT jszhang measurementofthebranchingfractionofdtnt AT jwzhang measurementofthebranchingfractionofdtnt AT jxzhang measurementofthebranchingfractionofdtnt AT jyzhang measurementofthebranchingfractionofdtnt AT jzzhang measurementofthebranchingfractionofdtnt AT jianyuzhang measurementofthebranchingfractionofdtnt AT lmzhang measurementofthebranchingfractionofdtnt AT leizhang measurementofthebranchingfractionofdtnt AT pzhang measurementofthebranchingfractionofdtnt AT qyzhang measurementofthebranchingfractionofdtnt AT ryzhang measurementofthebranchingfractionofdtnt AT shzhang measurementofthebranchingfractionofdtnt AT shuleizhang measurementofthebranchingfractionofdtnt AT xmzhang measurementofthebranchingfractionofdtnt AT xyzhang measurementofthebranchingfractionofdtnt AT xyzhang measurementofthebranchingfractionofdtnt AT yzhang measurementofthebranchingfractionofdtnt AT yzhang measurementofthebranchingfractionofdtnt AT ytzhang measurementofthebranchingfractionofdtnt AT yhzhang measurementofthebranchingfractionofdtnt AT ymzhang measurementofthebranchingfractionofdtnt AT yanzhang measurementofthebranchingfractionofdtnt AT zdzhang measurementofthebranchingfractionofdtnt AT zhzhang measurementofthebranchingfractionofdtnt AT zlzhang measurementofthebranchingfractionofdtnt AT zyzhang measurementofthebranchingfractionofdtnt AT zyzhang measurementofthebranchingfractionofdtnt AT zzzhang measurementofthebranchingfractionofdtnt AT gzhao measurementofthebranchingfractionofdtnt AT jyzhao measurementofthebranchingfractionofdtnt AT jzzhao measurementofthebranchingfractionofdtnt AT lzhao measurementofthebranchingfractionofdtnt AT leizhao measurementofthebranchingfractionofdtnt AT mgzhao measurementofthebranchingfractionofdtnt AT nzhao measurementofthebranchingfractionofdtnt AT rpzhao measurementofthebranchingfractionofdtnt AT sjzhao measurementofthebranchingfractionofdtnt AT ybzhao measurementofthebranchingfractionofdtnt AT yxzhao measurementofthebranchingfractionofdtnt AT zgzhao measurementofthebranchingfractionofdtnt AT azhemchugov measurementofthebranchingfractionofdtnt AT bzheng measurementofthebranchingfractionofdtnt AT bmzheng measurementofthebranchingfractionofdtnt AT jpzheng measurementofthebranchingfractionofdtnt AT wjzheng measurementofthebranchingfractionofdtnt AT yhzheng measurementofthebranchingfractionofdtnt AT bzhong measurementofthebranchingfractionofdtnt AT xzhong measurementofthebranchingfractionofdtnt AT hzhou measurementofthebranchingfractionofdtnt AT jyzhou measurementofthebranchingfractionofdtnt AT lpzhou measurementofthebranchingfractionofdtnt AT szhou measurementofthebranchingfractionofdtnt AT xzhou measurementofthebranchingfractionofdtnt AT xkzhou measurementofthebranchingfractionofdtnt AT xrzhou measurementofthebranchingfractionofdtnt AT xyzhou measurementofthebranchingfractionofdtnt AT yzzhou measurementofthebranchingfractionofdtnt AT zczhou measurementofthebranchingfractionofdtnt AT anzhu measurementofthebranchingfractionofdtnt AT jzhu measurementofthebranchingfractionofdtnt AT kzhu measurementofthebranchingfractionofdtnt AT kjzhu measurementofthebranchingfractionofdtnt AT kszhu measurementofthebranchingfractionofdtnt AT lzhu measurementofthebranchingfractionofdtnt AT lxzhu measurementofthebranchingfractionofdtnt AT shzhu measurementofthebranchingfractionofdtnt AT tjzhu measurementofthebranchingfractionofdtnt AT wdzhu measurementofthebranchingfractionofdtnt AT yczhu measurementofthebranchingfractionofdtnt AT zazhu measurementofthebranchingfractionofdtnt AT jhzou measurementofthebranchingfractionofdtnt AT jzu measurementofthebranchingfractionofdtnt

Measurement of the branching fraction of D + → τ + ν τ

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