Measurement of e + e − → η J / ψ cross section from s = 3.808     GeV to 4.951 GeV

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doi:10.1103/PhysRevD.109.092012

Title: Measurement of $e^{+} e^{-} \to η J / ψ$ cross section from $\sqrt{s} = 3.808 GeV$ to 4.951 GeV

Journal Article · 29 May 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.092012 · OSTI ID:2368612

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 »

Using data samples with an integrated luminosity of $22.42 {fb}^{- 1}$ collected by the BESIII detector operating at the BEPCII storage ring, we measure the cross sections of the $e^{+} e^{-} \to η J / ψ$ process at center-of-mass energies from 3.808 to 4.951 GeV. Three structures are observed in the line shape of the measured cross sections. A maximum-likelihood fit with $ψ (4040)$ , two additional resonances, and a nonresonant component are performed. The mass and width of the first additional state are $(4219.7 \pm 2.5 \pm 4.5) MeV / c^{2}$ and $(80.7 \pm 4.4 \pm 1.4) MeV$ , respectively, consistent with the $ψ (4230)$ . For the second state, the mass and width are $(4386 \pm 13 \pm 17) MeV / c^{2}$ and $(177 \pm 32 \pm 13) MeV$ , respectively, consistent with the $ψ (4360)$ . The first uncertainties are statistical, and the second ones are systematic. The statistical significance of $ψ (4040)$ is $8.0 σ$ and those for $ψ (4230)$ and $ψ (4360)$ are more than $10.0 σ$ . Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-05ER41374

OSTI ID:: 2368612

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 9 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Observation of a Charged Charmoniumlike Structure in e + e − → π + π − J / ψ at s = 4.26 GeV Ablikim, M.; Achasov, M. N.; Ai, X. C. Physical Review Letters, Vol. 110, Issue 25 https://doi.org/10.1103/PhysRevLett.110.252001	journal	June 2013
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Study of e + e − → ω χ c J at Center of Mass Energies from 4.21 to 4.42 GeV Ablikim, M.; Achasov, M. N.; Ai, X. C. Physical Review Letters, Vol. 114, Issue 9 https://doi.org/10.1103/PhysRevLett.114.092003	journal	March 2015
Precise Measurement of the e + e − → π + π − J / ψ Cross Section at Center-of-Mass Energies from 3.77 to 4.60 GeV Ablikim, M.; Achasov, M. N.; Ahmed, S. Physical Review Letters, Vol. 118, Issue 9 https://doi.org/10.1103/PhysRevLett.118.092001	journal	March 2017
Evidence of Two Resonant Structures in e + e − → π + π − h c Ablikim, M.; Achasov, M. N.; Ahmed, S. Physical Review Letters, Vol. 118, Issue 9 https://doi.org/10.1103/PhysRevLett.118.092002	journal	March 2017
Evidence of a Resonant Structure in the e + e − → π + D 0 D * − Cross Section between 4.05 and 4.60 GeV Ablikim, M.; Achasov, M. N.; Ahmed, S. Physical Review Letters, Vol. 122, Issue 10 https://doi.org/10.1103/PhysRevLett.122.102002	journal	March 2019
Observation of Resonance Structures in e+e−→π+π−ψ2(3823) and Mass Measurement of ψ2(3823) Ablikim, M.; Achasov, M. N.; Adlarson, P. Physical Review Letters, Vol. 129, Issue 10 https://doi.org/10.1103/PhysRevLett.129.102003	journal	September 2022
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Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV / c 2 in the Reaction e + e − → π + π − ψ ( 2 S ) Measured at BABAR Aubert, B.; Barate, R.; Bona, M. Physical Review Letters, Vol. 98, Issue 21 https://doi.org/10.1103/PhysRevLett.98.212001	journal	May 2007
Observation of Two Resonant Structures in e + e − → π + π − ψ ( 2 S ) via Initial-State Radiation at Belle Wang, X. L.; Yuan, C. Z.; Shen, C. P. Physical Review Letters, Vol. 99, Issue 14 https://doi.org/10.1103/PhysRevLett.99.142002	journal	October 2007
Measurement of the e + e − → π + π − J / ψ Cross Section Via Initial-State Radiation at Belle Yuan, C. Z.; Shen, C. P.; Wang, P. Physical Review Letters, Vol. 99, Issue 18 https://doi.org/10.1103/PhysRevLett.99.182004	journal	November 2007
Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data Actis, S.; Arbuzov, A.; Balossini, G. The European Physical Journal C, Vol. 66, Issue 3-4 https://doi.org/10.1140/epjc/s10052-010-1251-4	journal	February 2010
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