Observation of e⁺e^- → KKJ/ψ at center-of-mass energies from 4.189 to 4.600 GeV

2018/02/04 by BESIII Collaboration, M. Ablikim, M. N. Achasov +442 · 1 citation
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1103/physrevd.97.071101

published as Phys. Rev. D 97, 071101 (2018) · 8 pages, 3 figures

arxiv created 2018/02/04 · arxiv updated 2018/04/18

Abstract

We investigate the process e⁺e^- → KKJ/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 K_S⁰ K_S⁰ J/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.

Cited by

• Dipionic transitions of Y(4500) to J/ψ