2015/12/31 by BESIII Collaboration, M. Ablikim, X. Ai +432
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #Bar (unit) #Branching (polymer chemistry) #Branching fraction #Chemistry #Chromatography #Composite material #Electron–positron annihilation #Hadron #High-Energy Particle Collisions Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex
paper · pdf · doi:10.1103/physrevd.93.052010
published as Phys. Rev. D 93, 052010 (2016) · 9 pages, 4 figures
openalex publication_date 2016/01/01 · arxiv created 2016/02/29 · arxiv updated 2016/03/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/22
Using a data sample of 1.31×109 J/ψ events accumulated with the BESIII detector, the decay J/ψ→ppφ 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.