Using a data sample of 1.31×109 J/ψ events accumulated with the BESIII detector, the decay J/ψ→p¯pϕ is studied via two decay modes, ϕ→K0SK0L and ϕ→K+K−. The branching fraction of J/ψ→p¯pϕ is measured to be B(J/ψ→p¯pϕ)=[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 p¯p mass threshold, denoted as X(p¯p), is observed, and the upper limit on the branching fraction of J/ψ→X(p¯p)ϕ→p¯pϕ is determined to be B(J/ψ→X(p¯p)ϕ→p¯pϕ)<2.1×10−7 at the 90% confidence level.

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

AMOROSO, Antonio;BIANCHI, Fabrizio;DESTEFANIS, Marco Giovanni Maria;DE MORI, FRANCESCA;GRECO, Michela;HU, Jifeng;MAGGIORA, MARCO;MARCELLO, Simonetta;SOSIO, Stefano;SPATARO, STEFANO GIOVANNI;ZOTTI, LAURA;
2016-01-01

Abstract

Using a data sample of 1.31×109 J/ψ events accumulated with the BESIII detector, the decay J/ψ→p¯pϕ is studied via two decay modes, ϕ→K0SK0L and ϕ→K+K−. The branching fraction of J/ψ→p¯pϕ is measured to be B(J/ψ→p¯pϕ)=[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 p¯p mass threshold, denoted as X(p¯p), is observed, and the upper limit on the branching fraction of J/ψ→X(p¯p)ϕ→p¯pϕ is determined to be B(J/ψ→X(p¯p)ϕ→p¯pϕ)<2.1×10−7 at the 90% confidence level.
2016
93
5
052010-1
052010-10
http://harvest.aps.org/bagit/articles/10.1103/PhysRevD.93.052010/apsxml
Nuclear and High Energy Physics
Ablikim, M.; Achasov, M.N.; Ai, X.C.; Albayrak, O.; Albrecht, M.; Ambrose, D.J.; Amoroso, A.; An, F.F.; An, Q.; Bai, J.Z.; Baldini Ferroli, R.; Ban, Y...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1635150
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