TY - JOUR

T1 - Helicity amplitude analysis of χcJ → ϕϕ

AU - BESIII Collaboration

AU - Ablikim, M.

AU - Achasov, M. n.

AU - Nikolaev, I. b.

AU - Мучной, Николай Юрьевич

PY - 2023/5/9

Y1 - 2023/5/9

N2 - Using (447.9 ± 2.3) million ψ(3686) events collected with the BESIII detector, the decays of χcJ → ϕϕ (J = 0, 1, 2) have been studied via the decay ψ(3686) → γχcJ. The branching fractions of the decays χcJ → ϕϕ (J = 0, 1, 2) are determined to be (8.59 ± 0.27 ± 0.20) × 10−4, (4.26 ± 0.13 ± 0.15) × 10−4, and (12.67 ± 0.28 ± 0.33) × 10−4, respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process ψ(3686) → γχcJ , χcJ → ϕϕ, ϕ → K+K−, the polarization parameters of the χcJ → ϕϕ decays are determined for the first time.

AB - Using (447.9 ± 2.3) million ψ(3686) events collected with the BESIII detector, the decays of χcJ → ϕϕ (J = 0, 1, 2) have been studied via the decay ψ(3686) → γχcJ. The branching fractions of the decays χcJ → ϕϕ (J = 0, 1, 2) are determined to be (8.59 ± 0.27 ± 0.20) × 10−4, (4.26 ± 0.13 ± 0.15) × 10−4, and (12.67 ± 0.28 ± 0.33) × 10−4, respectively, which are the most precise measurements to date. From a helicity amplitude analysis of the process ψ(3686) → γχcJ , χcJ → ϕϕ, ϕ → K+K−, the polarization parameters of the χcJ → ϕϕ decays are determined for the first time.

U2 - 10.1007/JHEP05(2023)069

DO - 10.1007/JHEP05(2023)069

M3 - Article

VL - 2023

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

IS - 5

M1 - 69

ER -