Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D+ → K+π0, D+ → K+η and D+ → K+η′

A bstract Using 20.3 fb − 1 of e + e − collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we present the measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D + → K + π 0 , D + → K + η and D + → K + η′ with the double-tag method, with significantly improved precision compared to the previous measurements. The statistical significance of each signal decay exceeds 10 σ . The branching fractions are determined to be ℬ( D + → K + π 0 ) = (1.45 ± 0.06 ± 0.08) × 10 − 4 , ℬ( D + → K + η ) = (1.17 ± 0.10 ± 0.03) × 10 − 4 and ℬ( D + → K + η′ ) = (1.88 ± 0.15 ± 0.11) × 10 − 4 , where the first uncertainties are statistical and the second systematic. The branching fractions of D + → K + η and D + → K + η′ are consistent with the world average values. The reported branching fraction of D + → K + π 0 deviates with the world average value by 3 σ .

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Journal of High Energy Physics
Published
2025-10-21
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https://doi.org/10.1007/jhep10(2025)178
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Particle physics theoretical and experimental studies
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article

Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D+ → K+π0, D+ → K+η and D+ → K+η′

K. Sun, Z. W. Ge, G. Chen, J. Y. Zhou et al.
Journal of High Energy Physics
Particle physics theoretical and experimental studies
article

Measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D+ → K+π0, D+ → K+η and D+ → K+η′

K. Sun, Z. W. Ge, G. Chen, J. Y. Zhou, K. Y. Shan, J. J. Zhang, H. M. Liu, X. Wang, Zhe Ning, G. S. Huang, Y. K. Heng, L. J. Li, J. Yu, Yuzhi Che, A. Kupść, G. B. Sun, H. L., X. L. Ji, Y. S. Huang, J. L. Qin, Y. F. Liang, L. Yan, S. Wang, J. Dong, J. Y. Zhao, M. H. Ye, Hongyu Zhang, H. X. Yang, Tao Yu, V. Khachatryan, C. Z. Yuan, B. Wang, Quan Ji, Z. X. Zhang, Y. J. Wang, C. Li, S. X. Li, Hao Liu, J. L. Shi, D. H. Zhang, R. Q., M. Y. Dong, Y. T. Gu, H. R. Wei, X. M. Zhang, W. C. Yan, M. G. Zhao, J. Libby, S. Marcello, P. C. Jiang, M. Maggiora, X. R. Zheng, Xiang Liu, W. Gradl, Y. T. Feng, F. Hanisch, J. J. Fan, X. M. Xian, Yaqian Wang, K. Liu, Rongjie Yang, W. J. Zheng, A. Calcaterra, J. S. Zhang, H. B. Jiang, K. J. Zhu, S. Qian, C. J. Tang, F. C., S. Kabana, T. Y. Li, D. M. Li, Yuanbo Chen, X. F. Wang, G. Y. Tang, R. Li, Y. Y. Ji, W. M. Song, X. L. Kang, X. Q. Yuan, J. J. Liu, M. Kavatsyuk, Z. L. Zhang, H. L. Yang, J. B. Jiao, X. J. Wang, Z. L. Wang, Y. D. Wang, P. Egorov, Y. Q. Chen, Z. H. Qu, J. X. Teng, A. Bortone, L. Q. Huang, Y. Sun, C. Y. Guan, Tianyu Xing, N. Zhao, I. Denisenko, W. K. Liu, Z. K. Chen, Z. Y. Wang, Y. Raghu Reddy, F. M. Melendi, Y. J. Wu, Z. J. Ye, X. L. Li, C. Geng, X. Q. Hao, Jingshu Li, W. Z. Zhu, X. Zeng, Y. M. Zhang, D. X. Lin, H. H. Zhang, G. X. Sun, XY Zhang, Y. W. Fu, X. C. Lou, H. Y. Xu, L. Xia, Jialun Ping, P. C. Hong, H. Liu, M. Wang, S. Malde, Zhuojun Chen, S. Y. Shi, J. Muskalla, A. Zhemchugov, M. H. Cai, Z. Chen, Zian Zhu, K. Begzsuren, F. De Mori, N. Huesken, N. Zhang, G. Y. Zhang, R. Aliberti, A. Khoukaz, B. Liu, L. Q. Lin, Liangliang Wang, X. Y. Chen, Q. A. Malik, W. H. Shen, A. A. Zafar, T. J. Zhu, T. Chen, Z. L. Hou, Z. Q. Wang, Q. Hu, T. Luo, B. X. Zhang, H. R. Qi, W. Xu, G. Y. Xiao, X. K. Liu, A. Gilman, M. L. Chen, Q. X. Li, C. Zhong, X. H. Li, Z. L. Zhang, N. Salone, L. Y. Tao, H. Y. Chen, I. Boyko, M. Ye, M. Greco, P. Liu, Jianbei Liu, X. Z. Li, K. J. Xie, V. Batozskaya, X. R. Zhou, M. Lellmann, K. Wang, R. Farinelli, G. Y. Hou, T. Z. Song, Y. H. Fan, A. Sarantsev, M. R. Li, O. Bakina, C. Herold, M. H. Li, C. H. Heinz, X. Liu, F. Weidner, J. J. Tang, M. Tat, F. A. Harris, J. H. Yang, Y. Q. Wang, J. F. Hu, Y. Pan, T. J. Wang, B. X. Liu, Y. H. Lyu, G. Cibinetto, Yanping Huang, Hai-Bo Li, I. Mackay, J. D. Gong, M. Fritsch, S. J. Chen, Y. Wang, M. Rolo, Meng Wang, S. Garbolino, E. Gersabeck, Xiang Ma, P. B. Qin, Z. Y. Li, M. Ablikim, Y. N. Wang, Y. R. Hou, X. Y. Liu, T. Sun, W. P. Wang, F. E. Maas, Q. Ouyang, Zh. Zh. Zhang, B. Wang, Y. J. Zeng, M. Scodeggio, Y. J. Mao, Chuangjie Xu, J. P. Zheng, Y. H. Meng, Teng Li, Z. J. Li, X. Y. Li, Y. C. Xu, S.-K. Choi, M. Kuessner, Y. F. Lyu, X. Y. Ma, Y. Ban, Z. D. Liu, Z. Z. Zhang, Y. H. Zhan, C. Q. Feng, B. Zheng, L. Fava, I. Garzia, Danli Jiang, Y. Schelhaas, A. M. Marshall, Y. Q. Chen, H. Zhang, Q. Zhang, J. X. Zhang, Xurong Chen, Y. T. Zhang, S. L. Olsen, X. Y. Zhou, Y. N. Gao, Zhengde Zhang, F. H. Heinsius, Wei Wang, K. Götzen, Huaqiao Zhang, X. 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E. de Boer, X. Q. Yan, T. Johansson, U. Wiedner, X. P. Qin, Y. P. Guo, H. J. Li, K. Schoenning, W. H. Yan, X. X. Ding, J. Q. Zhou, C. Li, H. Gao, G. Liu, Z. H. Lu, N. Cao, F. Nerling, H. F. Shen, J. H. Feng, A. Q. Guo, W. H. Tian, Chao Chen, P. Adlarson, Y. C. Zhu, F. Yan, H. Peng, L. R., Z. L. Wang, A. Brueggemann, Yuehui Lu, W. X. Gong, X. Y. Zhai, Z. Y. Yuan, L. H. Wu, N. Kalantar-Nayestanaki, Feng Liu, Y. P. Li, Y. Nefedov, Y. C. Yu, Y. Q. Yang, F. Stieler, K. X. Huang, Y. Zhou, Y. F. Liang, S. Plura, J. F. Shangguan, Y. P. Zhang, R. G. Ping, T. J. Jiang, X. Cai, J. F. Chang, X. T., Z. F. Tian, H. Miao, Jielei Zhang, T. Ma, J. H. Yin, S. H. Zeng, Peilian Li, L. C. Liu, A. N. Zhu, Y. Lu, C. F. Redmer, J. J. Song, A. Q. Zhang, H. Cai, G. R., K. L. Li, K. L. Li, H. Zhang, Xudong Yu, C. Wang, Y. F. Yang, Huiying Sun, Hao-Kai Sun, T. Hussain, S. Spataro, X. Shi, F. X. Lu, Weidong D. Zhu, P. Zhang, B. Moses, X. Dong, B. L. Zhang, Y. Ding, A. Dbeyssi, A. Pathak, E. Bianco, N. in der Wiesche, Shuihan Zhang, M. Wolke, Qian Liu, P. R. Li, Ye Yuan, F. H. Liu, L. Yuan, Ting Wang, Gang Li, Lei Li, Jiawen Zhang, Yubin Zhao, Z. Jiao, Jianyu Zhang, Yu Zhang, Yong Fang, Heng Xu, Xueyao Zhang, Z. You, Tao Yang, F. Bianchi, Shubin Liu, G. Mezzadri, Y. G. Xie, T. T. Han, Cheng Li, Kejun Zhu, J. Tang, Jin Zhang, Zhiqing Liu, Li Fei, Y. Yang, Y. Jin, T. Hu, Weiguo Li, Qing Lan, B. Yu, L. Y. Dong, Long Yu, Lianjie Wu, S. S. Rong, D. Xiao, B. A. Shi, Y. G. Xie, X. Pan, A. Guskov, H. L. Dai, T. Lenz, Shulei Zhang, X. H. Xie, Yu-Chang Sun, G. Rong, Chunhua Wu, X. Y. Shen, Y. X. Song, L. Zhu, Jingyan Shi, S. X. Du, M. Q. Jing, R. P. Guo, Ming Qi, Xiang Zhou, M. H. Liu, X. Wu, R. P. Zhao, G. Yu, J. Fang, X. T. Huang, Ch. Rosner, Zhen-Jun Xiao, Shaomin Chen, G. Felici, Guang Zhao, Tao Lin, H. Li, C. Normand, F. Z. Qi, H. Yuan, M. C. Yu, Y. X. Ding, H. Y. Yan, Yujie Zeng, X. S. Jiang, B. H. Xiang, Y. J. Su, Y. Ma, X. Chai, Haifeng Song, Lu Liu, H. Zhou, G. F. Cao, Z. Y. Deng, B. C. Ke, Y. P. Liao, F. Rosini, O. B. Kolcu, J. S. Luo, Xiaoshuai Qin, W. L. Xu, Ming Guo, Chunxu Yu, Y. Zheng, J. Y. Tian, Y. L. Zhao, C. C. Lin, B. Kopf, H. S. Chen, K. Li, L.L. Ma, Zhenan Liu, Han Liang, X. H. Wu, W. Kühn, F. Feldbauer, T. D. Xu, J. Fang, S. Pacetti, I. Uman, J. P. Dai, S. Nisar, H. J. Lu, Z. S. Xu, X. Li, Huihui Liu, N. W. Wang, X. R. Lyu, J. Jackson, T. J. Min, L. Zhang, S. Zhou, Angelo Rivetti, Qingjun Xu, J. J. Qin, Y. Zhang, Y. Z. Yang, Lei Zhang, N. Berger, M. Bertani, Jin Zhang, Y. Li, S. C. Yuan, Y. Xie, S. P. Wen, Z. P. Mao, K. L. He, W. Ji, Z. H. Zhang, Y. Liu, L. Feng, X. Zhuang, J. H. Rademacker, S. X. Du, Jinlong Zhang, S. Sosio, C. Wang, Y. Gao, Y. Bai, S. Su, Navneet Kumar, R. Kiuchi, Y. Yuan, N. Yu. Muchnoi, W. B. Qian, Selim Çetin, G. Wilkinson, L. Q. Qin, X. L. Wang, J. F. Wu, H. J. Yang, Z. Jiao, Y. Tian, Y. Y. Gao, P. Huang, Qichun Feng, K. Peters, Q. N. Xu, Hui Li, X. N. Wang, L. S. Nie, W. D. Niu, Z. J. Shang, Y. R. Wen, C. Q. 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article en

Abstract

A bstract Using 20.3 fb − 1 of e + e − collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, we present the measurements of the absolute branching fractions of the doubly Cabibbo-suppressed decays D + → K + π 0 , D + → K + η and D + → K + η′ with the double-tag method, with significantly improved precision compared to the previous measurements. The statistical significance of each signal decay exceeds 10 σ . The branching fractions are determined to be ℬ( D + → K + π 0 ) = (1.45 ± 0.06 ± 0.08) × 10 − 4 , ℬ( D + → K + η ) = (1.17 ± 0.10 ± 0.03) × 10 − 4 and ℬ( D + → K + η′ ) = (1.88 ± 0.15 ± 0.11) × 10 − 4 , where the first uncertainties are statistical and the second systematic. The branching fractions of D + → K + η and D + → K + η′ are consistent with the world average values. The reported branching fraction of D + → K + π 0 deviates with the world average value by 3 σ .

Journal of High Energy PhysicsVol. 2025(10)
Goethe University Frankfurt (DE), University of Science and Technology Liaoning (CN), University of Hawaiʻi at Mānoa (US), Liaoning University (CN), Università degli Studi del Piemonte Orientale “Amedeo Avogadro” (IT), Uppsala University (SE), University of Science and Technology of China (CN), University of Hawaii System (US), Institute of Business Administration Karachi (PK), Mongolian Academy of Sciences (MN), Central South University (CN), Guangxi University (CN), Nanjing Normal University (CN), Liaoning Normal University (CN), North China Electric Power University (CN), Moscow Institute of Physics and Technology (RU), Shandong University (CN), Sun Yat-sen University (CN), COMSATS University Islamabad (PK), Hangzhou Normal University (CN), Hunan University (CN), Henan University of Science and Technology (CN), University of Groningen (NL), GSI Helmholtz Centre for Heavy Ion Research (DE), University of the Punjab (PK), Hunan Normal University (CN), Henan University (CN), Shanxi University (CN), Shanghai Jiao Tong University (CN), Yantai University (CN), University of Tarapacá (CL), Guangxi University of Science and Technology (CN), South China Normal University (CN), Novosibirsk State University (RU), Yunnan University (CN), Jilin University (CN), Johannes Gutenberg University Mainz (DE), Justus-Liebig-Universität Gießen (DE), University of Ferrara (IT), Qufu Normal University (CN), Peking University (CN), Nankai University (CN), University of Münster (DE), Sichuan University (CN), Indian Institute of Technology Madras (IN), Fudan University (CN), Inner Mongolia University (CN), University of Perugia (IT), Kurchatov Institute (RU), Shandong Normal University (CN), University of Manchester (GB), Guangxi Normal University (CN), China University of Geosciences (CN), Huangshan University (CN), Joint Institute for Nuclear Research (RU), University of Jinan (CN), Henan University of Technology (CN), University of Bristol (GB), Wuhan University (CN), Zhengzhou University (CN), Soochow University (CN), University of Oxford (GB), Central China Normal University (CN), National Centre for Nuclear Research (PL), Institute of Particle Physics (CA), Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara (IT), Helmholtz Institute Mainz (DE), Indiana University Bloomington (US), Istinye University (TR), Siberian Branch of the Russian Academy of Sciences (RU), Institute of Modern Physics (CN), Institute of Nuclear and Particle Physics (GR), Jilin Medical University (CN), Institute of High Energy Physics (CN), Shanxi University of Traditional Chinese Medicine (CN), Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati (IT), Piedmont University (US), Bristol Robotics Laboratory (GB), Istituto Nazionale di Fisica Nucleare, Sezione di Perugia (IT), University of Chinese Academy of Sciences (CN), Hebei University (CN), Budker Institute of Nuclear Physics (RU), École Polytechnique Fédérale de Lausanne (CH), China Center of Advanced Science and Technology (CN), University of Turin (IT), Indiana University (US), Chung-Ang University (KR), Near East University (CY), Carnegie Mellon University (US), Henan Normal University (CN), Zhejiang University (CN), Lanzhou University (CN), Southeast University (CN), Renmin University of China (CN), Suranaree University of Technology (TH), Beihang University (CN), Nanjing University (CN), Ruhr University Bochum (DE), University of South China (CN), Shanxi Normal University (CN), Tsinghua University (CN)
U.S. Department of Energy, Strong, National Research Foundation, Deutsche Forschungsgemeinschaft, National Natural Science Foundation of China, Chinese Academy of Sciences, National Research Foundation of Korea, Knut och Alice Wallenbergs Stiftelse, Vetenskapsrådet, Istituto Nazionale di Fisica Nucleare, Shanghai Key Laboratory for Particle Physics and Cosmology, Agencia Nacional de Investigación y Desarrollo, Institute of High Energy Physics
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Particle physics theoretical and experimental studies
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