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Observation of χcJJ=012→pp¯ηη

by Yu, B. X. , Zeng, S. H. , Shangguan, J. F. , Zhang, Q. , Zhang, Z. Z. , Zhao, Y. L. , Li, H. N. , Luo, M. X. , Achasov, M. N. , Zhu, J. , Tian, Y. , Wang, X. F. , Yu, G. , Luo, C. L. , Duan, Z. H. , Hu, T. , Su, S. S , Guo, R. P. , Liu, J. B. , Ning, Z. , Zhang, P. , Peng, Y. Y. , Wen, S. P. , Cai, H. , Mezzadri, G. , Shi, X. , Garbolino, S. , Zhuang, X. Y. , Qiao, J. H. , Wu, Y. J. , Zhang, Z. Y. , Wu, S. M. , Kalantar-Nayestanaki, N. , Sun, G. X. , Shan, X. Y. , Yang, Y. , Kolcu, O. B. , Qi, M. , Liu, Y. B. , Li, P. R. , Xu, X. P. , Wang, Y. L. , Guskov, A. , Zhang, H. H. , Zhang, Z. X. , Bianchi, F. , Chen, T. , Feng, J. H. , Teng, J. X. , Ai, X. C. , Li, C. , Sun, Y. H. , Nikolaev, I. B. , Xiao, Z. J. , Hou, X. T. , Zhou, X. , Zhao, R. P. , Zhu, Z. A. , Gao, X. B. , Ye, M. H. , Boyko, I. , Gersabeck, E. M. , Xu, G. F. , Yin, Junhao , Hong, P. C. , Wang, K. , Huang, G. S. , Lyu, Y. F. , Heng, Y. K. , Ji, Q. , Zhai, X. Y. , Liu, Z. D. , Zhang, J. W. , Kumar, N. , Amoroso, A. , Rong, G. , Guan, C. Y. , Qiao, C. F. , Qi, F. Z. , Zhang, Y. T. , Song, J. J. , Huang, P. , Zhu, T. J. , Li, H. J. , Berlowski, M. , Wang, Yuan , Wang, Y. F. , Nerling, F. , Sun, Y. J. , Sosio, S. , Wang, L. L. , Fritsch, M. , Li, M. H. , Bettoni, D. , Heinsius, F. H. , Shi, J. L. , Zheng, B. , D

in Candidates / Classical and Quantum Gravitation / Collaboration / Elementary Particles / Hypotheses / Kinematics / Monte Carlo simulation / Physics / Physics and Astronomy / Quantum Field Theories / Quantum Field Theory / Quantum Physics / Quarks / Radiation / Regular Article - Experimental Physics / Relativity Theory / Sensors / Storage rings (particle accelerators) / String Theory

2025

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Observation of χcJJ=012→pp¯ηη

2025

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Observation of χcJJ=012→pp¯ηη

2025

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Journal Article

Observation of χcJJ=012→pp¯ηη

Yu, B. X.,

Zeng, S. H.,

Shangguan, J. F.,

Zhang, Q.,

Zhang, Z. Z.,

Zhao, Y. L.,

Li, H. N.,

Luo, M. X.,

Achasov, M. N.,

Zhu, J.,

Tian, Y.,

Wang, X. F.,

Yu, G.,

Luo, C. L.,

Duan, Z. H.,

Hu, T.,

Su, S. S,

Guo, R. P.,

Liu, J. B.,

Ning, Z.,

Zhang, P.,

Peng, Y. Y.,

Wen, S. P.,

Cai, H.,

Mezzadri, G.,

Shi, X.,

Garbolino, S.,

Zhuang, X. Y.,

Qiao, J. H.,

Wu, Y. J.,

Zhang, Z. Y.,

Wu, S. M.,

Kalantar-Nayestanaki, N.,

Sun, G. X.,

Shan, X. Y.,

Yang, Y.,

Kolcu, O. B.,

Qi, M.,

Liu, Y. B.,

Li, P. R.,

Xu, X. P.,

Wang, Y. L.,

Guskov, A.,

Zhang, H. H.,

Zhang, Z. X.,

Bianchi, F.,

Chen, T.,

Feng, J. H.,

Teng, J. X.,

Ai, X. C.,

Li, C.,

Sun, Y. H.,

Nikolaev, I. B.,

Xiao, Z. J.,

Hou, X. T.,

Zhou, X.,

Zhao, R. P.,

Zhu, Z. A.,

Gao, X. B.,

Ye, M. H.,

Boyko, I.,

Gersabeck, E. M.,

Xu, G. F.,

Yin, Junhao,

Hong, P. C.,

Wang, K.,

Huang, G. S.,

Lyu, Y. F.,

Heng, Y. K.,

Ji, Q.,

Zhai, X. Y.,

Liu, Z. D.,

Zhang, J. W.,

Kumar, N.,

Amoroso, A.,

Rong, G.,

Guan, C. Y.,

Qiao, C. F.,

Qi, F. Z.,

Zhang, Y. T.,

Song, J. J.,

Huang, P.,

Zhu, T. J.,

Li, H. J.,

Berlowski, M.,

Wang, Yuan,

Wang, Y. F.,

Nerling, F.,

Sun, Y. J.,

Sosio, S.,

Wang, L. L.,

Fritsch, M.,

Li, M. H.,

Bettoni, D.,

Heinsius, F. H.,

Shi, J. L.,

Zheng, B.,

2025

Overview

A bstract Using (2712 . 4 ± 14 . 3) × 10 6 ψ (3686) candidates collected by the BESIII detector operating at the BEPCII storage ring, the decays χ cJ J = 0 1 2 → p p ¯ ηη are observed for the first time through the radiative transition ψ (3686) → γχ cJ . The statistical significances for χ cJ signals are all larger than 5 σ . The branching fractions of χ c 0 , 1 , 2 → p p ¯ ηη are determined to be (5 . 75 ± 0 . 59 ± 0 . 42) × 10 − 5 , (1 . 40 ± 0 . 33 ± 0 . 17) × 10 − 5 , and (2 . 64 ± 0 . 40 ± 0 . 27) × 10 − 5 , respectively, where the first uncertainties are statistical and the second systematic. No evident resonant structures are found in the p p ¯ and pη / p ¯ η systems.

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Publisher

Springer Berlin Heidelberg,Springer Nature B.V

Subject

Candidates

/ Classical and Quantum Gravitation

/ Collaboration

/ Elementary Particles

/ Hypotheses

/ Kinematics

/ Monte Carlo simulation