Determination of Spin-Parity Quantum Numbers of X ( 2370 ) as 0 − + from J / ψ → γ K S 0 K S 0 η ′

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Bao, H. -R.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bianco, E.; Bortone, A.; Boyko, I.; Briere, R. A.; Brueggemann, A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Cetin, S. A.; Chang, J. F.; Chang, W. L.; Che, G. R.; Chelkov, G.; Chen, C.; Chen, Chao; Chen, G.; Chen, H. S.; 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.; Choi, S. K.; Chu, X.; Cibinetto, G.; Coen, S. C.; Cossio, F.; Cui, J. J.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; de Boer, R. E.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; De Mori, F.; Ding, B.; Ding, X. X.; Ding, Y.; Ding, Y.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dong, X.; Du, M. C.; Du, S. X.; Duan, Z. H.; Egorov, P.; Fan, Y. H.; Fang, J.; Fang, S. S.; Fang, W. X.; Fang, Y.; Fang, Y. Q.; Farinelli, R.; Fava, L.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Feng, J. H.; Feng, Y. T.; Fischer, K.; Fritsch, M.; Fu, C. D.; Fu, J. L.; Fu, Y. W.; Gao, H.; Gao, Y. N.; Gao, Yang; Garbolino, S.; Garzia, I.; Ge, P. T.; Ge, Z. W.; Geng, C.; Gersabeck, E. M.; Gilman, A.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Gramigna, S.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, C. Y.; Guan, Z. L.; Guo, A. Q.; Guo, L. B.; Guo, M. J.; Guo, R. P.; Guo, Y. P.; Guskov, A.; Gutierrez, J.; Han, K. L.; Han, T. T.; Han, W. Y.; Hao, X. Q.; Harris, F. A.; He, K. K.; He, K. L.; Heinsius, F. H. H.; Heinz, C. H.; Heng, Y. K.; Herold, C.; Holtmann, T.; Hong, P. C.; Hou, G. Y.; Hou, X. T.; Hou, Y. R.; Hou, Z. L.; Hu, B. Y.; Hu, H. M.; Hu, J. F.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, K. X.; Huang, L. Q.; Huang, X. T.; Huang, Y. P.; Hussain, T.; Hüsken, N.; in der Wiesche, N.; Irshad, M.; Jackson, J.; Jaeger, S.; Janchiv, S.; Jeong, J. H.; Ji, Q.; Ji, Q. P.; Ji, X. 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doi:10.1103/PhysRevLett.132.181901

Determination of Spin-Parity Quantum Numbers of $X (2370)$ as $0^{- +}$ from $J / ψ \to γ K_{S}^{0} K_{S}^{0} η^{'}$

Journal Article · Thu May 02 00:00:00 EDT 2024 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.132.181901· OSTI ID:2345257

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; Bao, H. -R.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F. more »

Based on $(10087 \pm 44) \times 10^{6} J / ψ$ events collected with the BESIII detector, a partial wave analysis of the decay $J / ψ \to γ K_{S}^{0} K_{S}^{0} η^{'}$ is performed. The mass and width of the $X (2370)$ are measured to be $2395 \pm 11 (stat)_{- 94}^{+ 26} (syst) MeV / c^{2}$ and $188_{- 17}^{+ 18} (stat)_{- 33}^{+ 124} (syst) MeV$ , respectively. The corresponding product branching fraction is $B [J / ψ \to γ X (2370)] \times B [X (2370) \to f_{0} (980) η^{'}] \times B [f_{0} (980) \to K_{S}^{0} K_{S}^{0}] = (1.31 \pm 0.22 (stat)_{- 0.84}^{+ 2.85} (syst)) \times 10^{- 5}$ . The statistical significance of the $X (2370)$ is greater than $11.7 σ$ and the spin parity is determined to be $0^{- +}$ for the first time. The measured mass and spin parity of the $X (2370)$ are consistent with the predictions of the lightest pseudoscalar glueball.

Published by the American Physical Society 2024

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Research Organization:: Indiana Univ., Bloomington, IN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: FG02-05ER41374

OSTI ID:: 2345257

Alternate ID(s):: OSTI ID: 2579696

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 132; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Determination of Spin-Parity Quantum Numbers of $X (2370)$ as $0^{- +}$ from $J / ψ \to γ K_{S}^{0} K_{S}^{0} η^{'}$