Measurement of <i>e</i><SUP>+</SUP><i>e</i><SUP>-</SUP> → <i>K</i>(<i>K</i>)over-bar<i>J</i>/ψ cross sections at center-of-mass energies from 4.189 to 4.600 GeV


Ablikim M., Achasov M. N., Ahmed S., Albrecht M., Amoroso A., An F. F., ...More

PHYSICAL REVIEW D, vol.97, no.7, 2018 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 97 Issue: 7
  • Publication Date: 2018
  • Doi Number: 10.1103/physrevd.97.071101
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Bursa Uludag University Affiliated: No

Abstract

We investigate the process e(+)e(-) -> K (K) over barJ/psi 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/psi and K(S)(0)K(S)(0)J/psi are measured as a function of center-of-mass energy. The energy dependence of the cross section for e(+)e(-) -> K(+)K(-)J/psi is shown to differ from that for pi(+)pi(-)J/psi 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/psi cross section that is not present in pi(+)pi(-)J/psi.