Using a sample of ∼1010 J/ψ events collected by the BESIII detector at the BEPCII collider, a partial-wave analysis of the decay γγφ is performed to investigate the intermediate resonances in J/ψ→γR, R→γφ. Resonances including f1(1285), η(1405), f1(1420), f1(1510), f2(1525), X(1835), f2(1950), f2(2010), f0(2200), and ηc have been detected with statistical significance greater than 5σ. The product branching fractions B(J/ψ→γR,R→γφ) are reported, and the resonance parameters of η(1405) and X(1835) have been precisely determined. It seems likely that η(1405) and X(1835) act as the first - and second - excited states of η′, respectively. The observation of ηc→γφ holds great significance for the in depth study of charmonium properties. No evidence of η(1295), η1(1855) or X(2370) is found. The measured upper limits of relevant branching fraction products do not conflict with theoretical expectations for X(2370) as a pseudoscalar glueball and η1(1855) as a hybrid state.

Partial-wave analysis of J/ψ →γγφ

Amoroso, A.;Bianchi, F.;Destefanis, M.;De Mori, F.;Greco, M.;Maggiora, M.;Marcello, S.;Sosio, S.;Spataro, S.;
2025-01-01

Abstract

Using a sample of ∼1010 J/ψ events collected by the BESIII detector at the BEPCII collider, a partial-wave analysis of the decay γγφ is performed to investigate the intermediate resonances in J/ψ→γR, R→γφ. Resonances including f1(1285), η(1405), f1(1420), f1(1510), f2(1525), X(1835), f2(1950), f2(2010), f0(2200), and ηc have been detected with statistical significance greater than 5σ. The product branching fractions B(J/ψ→γR,R→γφ) are reported, and the resonance parameters of η(1405) and X(1835) have been precisely determined. It seems likely that η(1405) and X(1835) act as the first - and second - excited states of η′, respectively. The observation of ηc→γφ holds great significance for the in depth study of charmonium properties. No evidence of η(1295), η1(1855) or X(2370) is found. The measured upper limits of relevant branching fraction products do not conflict with theoretical expectations for X(2370) as a pseudoscalar glueball and η1(1855) as a hybrid state.
2025
111
5
052011-1
052011-17
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.111.052011
Color confinement, Quantum chromodynamics, Quark model, Exotic mesons, Light mesons, Mesons, Mass, Parity, Spin
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.; Batoz...espandi
File in questo prodotto:
File Dimensione Formato  
PhysRevD.111.052011.pdf

Accesso aperto

Descrizione: paper
Tipo di file: PDF EDITORIALE
Dimensione 853.66 kB
Formato Adobe PDF
853.66 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2068736
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact