Measurements of the branching fractions of χ cJ → ϕϕη; ϕϕη′ and ϕK+K− η
Physical Review D, cilt.113, sa.9, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 113 Sayı: 9
- Basım Tarihi: 2026
- Doi Numarası: 10.1103/qns3-wyxt
- Dergi Adı: Physical Review D
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC, MathSciNet, zbMATH
- Boğaziçi Üniversitesi Adresli: Evet
Özet
Using a sample of (2712.4 ± 14.3) x 106 ψ(3686) events collected by the BESIII detector at the BEPCII collider, we measure the branching fractions of the decays χcJ → ϕϕη; ϕϕη′, and ϕK+K−η (J = 0, 1, 2). The obtained branching fractions are B(χc0 → ϕϕη) = (7.40 ± 0.23 ± 0.55) x 10−4, B(χc1 → ϕϕη) = (3.33 ± 0.14 ± 0.25) x 10−4, B(χc2 → ϕϕη) = (5.46 ± 0.17 ± 0.40) x 10−4, B(χc0→ ϕϕη′) = (2.96 ± 0.23 ± 0.29) x 10−4, B(χc1 → ϕϕη′) = (0.69 ± 0.10 ± 0.08) x 10−4, B(χc2 → ϕϕη′) = (0.65 ± 0.09 ± 0.07) x 10−4, B(χc0 → ϕK+K−η) = (1.23 ± 0.08 ± 0.10) x 10−4, B(χc1 → ϕK+K−η) = (1.00 ± 0.07 ± 0.07) x 10−4, and B(χc2 → ϕK+K−η) = (1.82 ± 0.09 ± 0.14) x 10−4, where K+K− is not from the decay of a ϕ meson, the first uncertainties are statistical and the second systematic. The branching fractions of χcJ → ϕϕη are measured with precision improved by factors of 1.5–1.9, and those of χcJ → ϕϕη′ and ϕK+K−η are measured for the first time.