Ablikim, M.Achasov, M. N.Ai, X. C.Albayrak, O.Albrecht, M.Ambrose, D. J.Amoroso, A.Lou, XinchouBESIII Collaboration2017-11-292017-11-292016-03-182016-03-181550-7998http://hdl.handle.net/10735.1/5599Using a data sample of 1.31 × 10⁹ J/ψ events accumulated with the BESIII detector, the decay J/ψ → pp̅φ is studied via two decay modes, φ → K_S⁰K_L⁰ and φ → K⁺K⁻. The branching fraction of J/ψ → pp̅φ is measured to be ℬ(J/ψ → pp̅φ) = [5.23 ± 0.06(stat) ± 0.33(syst)] x 10⁻⁵, which agrees well with a previously published measurement, but with a significantly improved precision. No evident enhancement near the pp̅ mass threshold, denoted as X(pp̅), is observed, and the upper limit on the branching fraction of J/ψ → X(pp̅)φ → pp̅φ is determined to be ℬ(J/ψ → X(pp̅)φ → pp̅φ) < 2.1 × 10⁻⁷ at the 90% confidence level.en©2016 American Physical Society. All rights reserved.Branching fractions (Nuclear physics)Hadrons—DecayCausality (Physics)Mesons—DecayJ/ψ (J/psi) mesonMass (Physics)articleAblikim, M., M. N. Achasov, X. C. Ai, O. Albayrak, et al. 2016. "Study of J /ψ →pp̅φ at BESIII." Physical Review D - Particles, Fields, Gravitation and Cosmology 93(5), doi:10.1103/PhysRevD.93.052010935