Branching fraction measurements of ψ(3686) → γχ_cJ

2017/03/31 by BESIII collaboration, M. Ablikim, M. N. Achasov +428 · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1103/physrevd.96.032001

published as Phys. Rev. D 96, 032001 (2017) · 14 pages, 6 figures

arxiv created 2017/07/10 · arxiv updated 2017/08/23

Abstract

Using a sample of 106 million ψ(3686) decays, the branching fractions of ψ(3686) → γχ_c0, ψ(3686) → γχ_c1, and ψ(3686) → γχ_c2 are measured with improved precision to be (9.389 ± 0.014 ± 0.332) %, (9.905 ± 0.011 ± 0.353) % , and (9.621 ± 0.013 ± 0.272) % , respectively, where the first uncertainties are statistical and the second ones are systematic. The product branching fractions of ψ(3686) → γχ_c1, χ_c1 → γJ/ψ and ψ(3686) → γχ_c2, χ_c2 → γJ/ψ and the branching fractions of χ_c1 → γJ/ψ and χ_c2 → γJ/ψ are also presented.

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