Search for the X ( 2370 ) and observation of η c → η η η ′ in J / ψ → γ η η η ′

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doi:10.1103/PhysRevD.103.012009

Title: Search for the $X (2370)$ and observation of $η_{c} \to η η η'$ in $J / ψ \to γ η η η'$

Journal Article · Fri Jan 29 00:00:00 EST 2021 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.103.012009· OSTI ID:1763787

Ablikim, M.; Achasov, M. N.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Baldini Ferroli, R.; Balossino, I.; Ban, Y.; Begzsuren, K.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F. more »

Using a sample of 1.31 × 10⁹ J/ψ events collected with the BESIII detector, we perform a study of J/ψ → γηηη' to search for the X(2370) and η_c in the ηηη' invariant mass distribution. No significant signal for the X(2370) is observed, and we set an upper limit for the product branching fraction of B(J/ψ → γX(2370) ∙ B(X(2370) → ηηη') < 9.2 × 10^–6 at the 90% confidence level. A clear η_c signal is observed for the first time, yielding a product branching fraction of B(J/ψ → γη_c) ∙ B(η_c → ηηη') = (4.86 ± 0.62 (stat) ± 0.45 (sys) ) × 10^–5.

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Research Organization:: Indiana Univ., Bloomington, IN (United States); Univ. of Minnesota, Minneapolis, MN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: BESIII Collaboration

Grant/Contract Number:: FG02-05ER41374; SC-0012069; QYZDJ-SSW-SLH003; QYZDJ-SSW-SLH040; SC0012069

OSTI ID:: 1763787

Alternate ID(s):: OSTI ID: 1849622

Journal Information:: Physical Review D, Journal Name: Physical Review D Vol. 103 Journal Issue: 1; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Search for the X ( 2370 ) and observation of η c → η η η ′ in J / ψ → γ η η η ′

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Title: Search for the $X (2370)$ and observation of $η_{c} \to η η η'$ in $J / ψ \to γ η η η'$