Search for the light hadron decay χ c 1 ( 3872 ) → π + π − 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.; 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, T. T.; 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. M.; Chen, T.; Chen, X. R.; Chen, X. T.; Chen, Y. B.; Chen, Y. Q.; Chen, Z. J.; Cheng, W. S.; 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. L.; Fang, J.; Fang, S. 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doi:10.1103/PhysRevD.109.L011102

Search for the light hadron decay $χ_{c 1} (3872) \to π^{+} π^{-} η$

Journal Article · Mon Jan 29 00:00:00 EST 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.109.L011102· OSTI ID:2283132

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.; Batozskaya, V.; Begzsuren, K.; Berger, N.; Berlowski, M.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bianco, E. more »

With a data sample corresponding to an integrated luminosity of $11.5 {fb}^{- 1}$ collected with the BESIII detector operating at the BEPCII storage ring, for the first time the light hadron decay $χ_{c 1} (3872) \to π^{+} π^{-} η$ is searched for. While no significant signal is observed, the upper limits at the 90% confidence level for $σ [e^{+} e^{-} \to γ χ_{c 1} (3872)] B [χ_{c 1} (3872) \to π^{+} π^{-} η]$ at center of mass energies from 4.13 GeV to 4.34 GeV are determined. By normalizing to the $χ_{c 1} (3872) \to π^{+} π^{-} J / ψ$ decay channel, a 90% confidence level upper limit for the branching fraction ratio $R = B [χ_{c 1} (3872) \to π^{+} π^{-} η] / B [χ_{c 1} (3872) \to π^{+} π^{-} J / ψ] < 0.12$ is given. These measurements provide important inputs for understanding the internal structure of the $χ_{c 1} (3872)$ resonance.

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:: 2283132

Alternate ID(s):: OSTI ID: 2579483

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Nonstandard heavy mesons and baryons: Experimental evidence Olsen, Stephen Lars; Skwarnicki, Tomasz; Zieminska, Daria Reviews of Modern Physics, Vol. 90, Issue 1 https://doi.org/10.1103/RevModPhys.90.015003	journal	February 2018
Hadronic molecules Guo, Feng-Kun; Hanhart, Christoph; Meißner, Ulf-G. Reviews of Modern Physics, Vol. 90, Issue 1 https://doi.org/10.1103/RevModPhys.90.015004	journal	February 2018
Four-quark hadrons: An updated review Esposito, Angelo; Guerrieri, Andrea L.; Piccinini, Fulvio International Journal of Modern Physics A, Vol. 30, Issue 04n05 https://doi.org/10.1142/S0217751X15300021	journal	February 2015
BEPCII Performance and Beam Dynamics Studies on Luminosity Yu, Chenghui; Duan, Zhe; Gu, Shengdong JACoW, Geneva, Switzerland https://doi.org/10.18429/JACoW-IPAC2016-TUYA01	text	January 2016

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Search for the light hadron decay $χ_{c 1} (3872) \to π^{+} π^{-} η$