Measurement of e+e- →k K J /ψ cross sections at center-of-mass energies from 4.189 to 4.600 GeV measurement of e+e- →k K J /ψ ⋯ M. ABLIKIM et al.

(BESIII Collaboration)

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Abstract

We investigate the process e+e-→KK̄J/ψ at center-of-mass energies from 4.189 to 4.600 GeV using 4.7 fb-1 of data collected by the BESIII detector at the BEPCII collider. The Born cross sections for the reactions e+e-→K+K-J/ψ and KS0KS0J/ψ are measured as a function of center-of-mass energy. The energy dependence of the cross section for e+e-→K+K-J/ψ is shown to differ from that for π+π-J/ψ in the region around the Y(4260). In addition, there is evidence for a structure around 4.5 GeV in the e+e-→K+K-J/ψ cross section that is not present in π+π-J/ψ.

Original languageEnglish (US)
Article number071101
JournalPhysical Review D
Volume97
Issue number7
DOIs
StatePublished - Apr 1 2018

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