In:
Journal of High Energy Physics, Springer Science and Business Media LLC, Vol. 2023, No. 5 ( 2023-05-09)
Abstract:
Using (447.9 ± 2.3) million ψ (3686) events collected with the BESIII detector, the decays of χ cJ → ϕϕ ( J = 0 , 1 , 2) have been studied via the decay ψ (3686) → γχ cJ . The branching fractions of the decays χ cJ → 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) → γχ cJ , χ cJ → ϕϕ, ϕ → K + K − , the polarization parameters of the χ cJ → ϕϕ decays are determined for the first time.
Type of Medium:
Online Resource
ISSN:
1029-8479
DOI:
10.1007/JHEP05(2023)069
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2023
detail.hit.zdb_id:
2027350-2
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