Study of J /ψ →p p φ at BESIII STUDY of J /ψ →p p -φ at BESIII M. ABLIKIM et al.

F. De Mori, М. Н. Ачасов, X. Ai, O. Albayrak, M. Albrecht, D. Ambrose, A. Amoroso, F. F. An, Q. An, J. Z. Bai

Abstract

Using a data sample of 1.31×109 J/ψ events accumulated with the BESIII detector, the decay J/ψ→pp¯ϕ is studied via two decay modes, ϕ→KS0KL0 and ϕ→K+K-. The branching fraction of J/ψ→pp¯ϕ is measured to be B(J/ψ→pp¯ϕ)=[5.23±0.06(stat)±0.33(syst)]×10-5, which agrees well with a previously published measurement, but with a significantly improved precision. No evident enhancement near the pp¯ mass threshold, denoted as X(pp¯), is observed, and the upper limit on the branching fraction of J/ψ→X(pp¯)ϕ→pp¯ϕ is determined to be B(J/ψ→X(pp¯)ϕ→pp¯ϕ)<2.1×10-7 at the 90% confidence level.

Locations

• arXiv (Cornell University) - View - PDF
• University of Groningen research database (University of Groningen / Centre for Information Technology) - View - PDF