Ablikim, M.Achasov, M. N.Ai, X. C.Albayrak, O.Albrecht, M.Ambrose, D. J.Amoroso, A.Lou, XinchouBESIII Collaboration2015-01-282015-01-282014-11-032014-11-031550-7998http://hdl.handle.net/10735.1/4293Using 1.06 x 10⁸ ψ(3686) events recorded in e⁺e⁻ collisions at √s = 3.686 GeV with the BESIII at the BEPCII collider, we present searches for C-parity violation in J/ψ → γγ and γϕ decays via ψ(3686) → J/ψ π⁺π⁻. No significant signals are observed in either channel. Upper limits on the branching fractions are set to be ℬ(J/ψ → γγ) < 2.7 x 10⁻⁷ and ℬ(J/ψ → γϕ) < 1.4 x 10⁻⁶ at the 90% confidence level. The former is one order of magnitude more stringent than the previous upper limit, and the latter represents the first limit on this decay channel.en©2014 American Physical SocietyJ/ψ Mesons (J/psi)Branching fractions (Nuclear physics)PhotonsArticleAblikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2014. "Search for C-parity violation in J/ψ → γγ and γϕ." Physical Review D 90(9), doi:10.1103/PhysRevD.90.092002909