Using (2712±14)×106 ψ(2S) events collected with the BESIII detector at the BEPCII collider, we search for the decays ηc(2S)→ωω and ηc(2S)→ωφ via the process ψ(2S)→γηc(2S). No statistically significant signals are observed. The upper limits of their product branching fractions at the 90% confidence level are determined to be B(ψ(2S)→γηc(2S),ηc(2S)→ωω)<1.04×10-6 and B(ψ(2S)→γηc(2S),ηc(2S)→ωφ)<1.85×10-7, respectively. We also update the branching fractions of χcJ→ωω and χcJ→ωφ via the ψ(2S)→γχcJ transition. Their branching fractions are determined to be B(χc0→ωω)=(10.66±0.11±0.57)×10-4, B(χc1→ωω)=(6.43±0.07±0.31)×10-4, B(χc2→ωω)=(8.75±0.08±0.42)×10-4, B(χc0→ωφ)=(1.18±0.03±0.07)×10-4, B(χc1→ωφ)=(2.04±0.15±0.11)×10-5, and B(χc2→ωφ)=(9.58±1.07±0.76)×10-6, where the first uncertainties are statistical and the second are systematic.

Search for ηc (2S) →ωω and ωφ and measurements of χcJ →ωω and ωφ in ψ (2S) radiative processes

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

Abstract

Using (2712±14)×106 ψ(2S) events collected with the BESIII detector at the BEPCII collider, we search for the decays ηc(2S)→ωω and ηc(2S)→ωφ via the process ψ(2S)→γηc(2S). No statistically significant signals are observed. The upper limits of their product branching fractions at the 90% confidence level are determined to be B(ψ(2S)→γηc(2S),ηc(2S)→ωω)<1.04×10-6 and B(ψ(2S)→γηc(2S),ηc(2S)→ωφ)<1.85×10-7, respectively. We also update the branching fractions of χcJ→ωω and χcJ→ωφ via the ψ(2S)→γχcJ transition. Their branching fractions are determined to be B(χc0→ωω)=(10.66±0.11±0.57)×10-4, B(χc1→ωω)=(6.43±0.07±0.31)×10-4, B(χc2→ωω)=(8.75±0.08±0.42)×10-4, B(χc0→ωφ)=(1.18±0.03±0.07)×10-4, B(χc1→ωφ)=(2.04±0.15±0.11)×10-5, and B(χc2→ωφ)=(9.58±1.07±0.76)×10-6, where the first uncertainties are statistical and the second are systematic.
2025
111
3
032001-1
032001-16
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.111.032001
Branching fraction, Particle decays, Quantum chromodynamics, Mesons, Lepton colliders
Ablikim, M.; Achasov, M. N.; Adlarson, P.; Afedulidis, O.; Ai, X. C.; Aliberti, R.; Amoroso, A.; An, Q.; Bai, Y.; Bakina, O.; Balossino, I.; Ban, Y.; ...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2068733
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