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Helicity amplitude analysis of χ_cJ → ϕϕ

M. Ablikim,M. Achasov,P. Adlarson,M. Albrecht,R. Aliberti,A. Amoroso,M. An,Q. An,X. Bai,Y. Bai,O. Bakina,R. Baldini Ferroli,I. Balossino,Y. Ban,V. Batozskaya,D. Becker,K. Begzsuren,N. Berger,M. Bertani,D. Bettoni,F. Bianchi,J. Bloms,A. Bortone,I. Boyko,R. Briere,A. Brueggemann,H. Cai,X. Cai,A. Calcaterra,G. Cao,N. Cao,S. Çetin,J. Chang,W. Chang,G. Chelkov,C. Chen,Chao Chen,G. Chen,Huifen. Chen,M. Chen,S. Chen,S. Chen,T. Chen,X. Chen,X. Chen,Y. Chen,Z. Chen,W. Cheng,S. Choi,X. Chu,G. Cibinetto,F. Cossio,J. Cui,H. Dai,J. Dai,A. Dbeyssi,R. E. de Boer,D. Dedovich,Z. Deng,A. Denig,I. Denysenko,M. Destefanis,F. De Mori,Y. Ding,J. Dong,L. Dong,M. Dong,X. Dong,S. Du,P. Egorov,Y. Fan,J. Fang,S. Fang,W. Fang,Y. Fang,R. Farinelli,L. Fava,F. Feldbauer,G. Felici,C. Feng,J. Feng,K. Fischer,M. Fritsch,C. Fritzsch,C. Fu,H. Gao,Y. Gao,Yan‐Yan Gao,S. Garbolino,I. Garzia,P. Ge,Z. Ge,C. Geng,E. Gersabeck,A. Gilman,K. Goetzen,L. Gong,W. Gong,W. Gradl,M. Greco,L. Gu,M. Gu,Y. Gu,C. Guan,A. Guo,L. Guo,R. Guo,Y. Guo,A. Guskov,T. Han,W. Han,X. Hao,F. Harris,K. He,K. He,F. Heinsius,C. H. Heinz,Y. Heng,C. Herold,M. Himmelreich,G. Hou,Y. Hou,Z. Hou,H. Hu,J. Hu,T. Hu,Y. Hu,G. S. Huang,K. Huang,L. Huang,L. Huang,X. Huang,Y. Huang,Z. Huang,T. Hussain,N. Hüsken,W. Imoehl,M. Irshad,J. Jackson,S. Jaeger,S. Janchiv,E. Jang,J. Jeong,Q. Ji,Q. Ji,X. Ji,X. Ji,Y. Ji,Z. Jia,H. Jiang,S. Jiang,X. Jiang,Y. Jiang,J. Jiao,Z. Jiao,S. Jin,Y. Jin,M. Jing,T. Johansson,N. Kalantar-Nayestanaki,X. Kang,R. Kappert,M. Kavatsyuk,B. Ke,I. Keshk,A. Khoukaz,R. Kiuchi,R. Kliemt,L. Koch,O. B. Kolcu,B. Kopf,M. Kuemmel,M. Kuessner,A. Kupsc,W. Kühn,J. J. Lane,J. Lange,P. Larin,A. Lavania,L. Lavezzi,T. Lei,Z. Lei,H. Leithoff,M. Lellmann,T. Lenz,C. Li,C. Li,C. Li,Cheng Li,D. Li,F. Li,G. Li,H. Li,H. Li,H. Li,H. Li,H. Li,J. Li,J. Li,J. Li,Kenneth K. Li,L. Li,L. Li,Lei Li,M. Li,P. Li,S. Li,S. Li,T. Li,W. Li,W. Li,X. Li,X. Li,Xiaoyu Li,Z. X. Li,Z. Li,H. Liang,H. Liang,H. Liang,Y. F. Liang,Y. Liang,G. Liao,L. Liao,J. Libby,A. Limphirat,C. Lin,D. Lin,T. Lin,B. Liu,C. Liu,D. Liu,F. Liu,F. Liu,Feng. Liu,G. Liu,H. Liu,H. Liu,H. Liu,Huanhuan Liu,Huihui Liu,J. Liu,J. Liu,J. Liu,Li-Yu Daisy Liu,Li-Yu Daisy Liu,Li-Yu Daisy Liu,Li-Yu Daisy Liu,Lusheng Liu,Mengxing Liu,Li-Yu Daisy Liu,Q. Liu,S. Liu,T. Liu,W. Liu,W. Liu,X. Liu,Y. Liu,Y. Liu,Z. Liu,Z. Liu,X. Lou,F. Lu,H. Lu,J. Lu,X. Lu,Y. Lu,Y. Lu,Z. Lu,Changzhi Luo,M. Luo,T. Luo,X. Luo,X. Lyu,Y. Lyu,F. Ma,H. Ma,L. Ma,M. Ma,Q. Ma,R. Ma,R. Ma,X. Ma,Y. Ma,F. Maas,M. Maggiora,S. Maldaner,S. Malde,Q. A. Malik,A. Mangoni,Y. Mao,Z. Mao,S. Marcello,Z. Meng,J. Messchendorp,G. Mezzadri,H. Miao,T. Min,R. Mitchell,X. Mo,N. Muchnoi,Y. Nefedov,F. Nerling,I. Nikolaev,Z. Ning,S. Nisar,Y. Niu,S. L. Olsen,Q. Ouyang,S. Pacetti,X. Pan,Y. Pan,A. Pathak,Y. Pei,M. Pelizaeus,H. Peng,K. Peters,J. Ping,R. Ping,S. Plura,S. Pogodin,V. Prasad,F. Qi,H. Qi,H. Qi,M. Qi,T. Qi,S. Qian,Z. Qian,C. Qiao,J. Qin,L. Qin,X. Qin,X. Qin,Z. Qin,J. Qiu,S. Qu,S. Qu,K. H. Rashid,C. Redmer,K. Ren,A. Rivetti,V. Rodin,M. Rolo,G. Rong,C. Rosner,S. Ruan,A. Sarantsev,Y. Schelhaas,C. Schnier,K. Schoenning,M. Scodeggio,K. Shan,W. Shan,X. Shan,J. Shangguan,L. Shao,M. Shao,C. Shen,H. Shen,X. Shen,B. Shi,H. Shi,J. Shi,Q. Shi,R. Shi,X. Shi,X. Shi,J. Song,W. Song,Y. Song,S. Sosio,S. Spataro,F. Stieler,K. Su,P. Su,Y. Su,G. Sun,H. Sun,H. Sun,J. Sun,L. Sun,S. Sun,T. Sun,W. Sun,X. Sun,Y. Sun,Y. Sun,Z. Sun,Y. Tan,Y. Tan,C. Tang,G. Tang,J. Tang,L. Tao,Q. Tao,M. Tat,J. Teng,V. Thorén,W. Tian,Y. Tian,I. Uman,B. Wang,B. Wang,B. Wang,C. Wang,D. Wang,F. Wang,H. Wang,H. Wang,K. Wang,L. Wang,M. Wang,M. Wang,Meng Wang,S. Wang,S. Wang,T. Wang,T. Wang,W. Wang,W. Wang,W. Wang,X. Wang,X. Wang,X. L. Wang,Yu Wang,Y. Wang,Y. Wang,Y. Wang,Y. Wang,Yaqian Wang,Z. Wang,Z. Wang,Ziyi Wang,D. Wei,F. Weidner,S. Wen,D. White,U. Wiedner,G. Wilkinson,M. Wolke,L. Wollenberg,L. Wu,L. Wu,X. Wu,X. Wu,Y. Wu,Y. Wu,Zhanghua Wu,L. Xia,T. Xiang,D. Xiao,G. Xiao,H. Xiao,S. Xiao,Y. Xiao,Z. Xiao,C. Xie,X. Xie,Y. Xie,Y. Xie,Y. Xie,Z. Xie,T. Xing,C. Xu,C. Xu,G. Xu,H. Xu,Q. Xu,X. Xu,Y. Xu,Z. Xu,F. Yan,L. Yan,W. Yan,W. Yan,H. Yang,H. Yang,Hang Yang,L. Yang,S. Yang,T. Yang,Y. Yang,Y. Yang,Yifan Yang,M. Ye,M. Ye,J. Yin,Z. You,B. Yu,C. Yu,G. Yu,T. Yu,X. Yu,C. Yuan,Lijuan Yuan,S. Yuan,X. Yuan,Y. Yuan,Z. Yuan,C. Yue,A. Zafar,F. Zeng,X. Zeng,Y. Zeng,Y. Zhan,A. Zhang,Bo Zhang,Bo Zhang,D. Zhang,G. Zhang,Houyu Zhang,H. Zhang,H. Zhang,H. Zhang,J. Zhang,J. Zhang,J. Zhang,J. X. Zhang,J. Zhang,J. Zhang,Jianyu Zhang,Jiawei Zhang,L. Zhang,L. Zhang,Lei. Zhang,P. Zhang,Q. Zhang,Shuihan Zhang,Shulei Zhang,X. D. Zhang,X. Zhang,X. Zhang,X. Zhang,Y. Zhang,Y. Zhang,Y. Zhang,Yan Zhang,Yao Zhang,Z. Zhang,Z. Zhang,Z. Zhang,G. Zhao,J. Zhao,J. Zhao,J. Zhao,Lei Zhao,Ling Zhao,M. Zhao,Q. Zhao,S. Zhao,Y. Zhao,Y. Zhao,Z. Zhao,A. Zhemchugov,B. Zheng,J. Zheng,Y. Zheng,B. Zhong,C. Zhong,X. Zhong,H. Zhou,L. Zhou,X. Zhou,X. Zhou,X. Zhou,X. Zhou,Yanlin Zhou,J. Zhu,K. Zhu,K. Zhu,L. Zhu,S. Zhu,S. Zhu,T. Zhu,W. Zhu,Y. Zhu,Z. Zhu,B. Zou,J. Zou,J. Zu

Published 2023 in Journal of High Energy Physics

ABSTRACT

Using (447.9 ± 2.3) million ψ (3686) events collected with the BESIII detector, the decays of χ _ cJ → ϕϕ ( J = 0 , 1 , 2) have been studied via the decay ψ (3686) → γχ _ cJ . The branching fractions of the decays χ _ cJ → ϕϕ ( J = 0 , 1 , 2) are determined to be (8 . 59 ± 0 . 27 ± 0 . 20) × 10^ − 4, (4 . 26 ± 0 . 13 ± 0 . 15) × 10^ − 4, and (12 . 67 ± 0 . 28 ± 0 . 33) × 10^ − 4, respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process ψ (3686) → γχ _ cJ , χ _ cJ → ϕϕ, ϕ → K ^+ K ^ − , the polarization parameters of the χ _ cJ → ϕϕ decays are determined for the first time.

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