Measurement of the <i>e</i><SUP>+</SUP><i>e</i><SUP>-</SUP> → η<i>J</i>/ψ cross section and search for <i>e</i><SUP>+</SUP><i>e</i><SUP>-</SUP> → π<SUP>0</SUP><i>J</i>/ψ at center-of-mass energies between 3.810 and 4.600 GeV


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Ablikim M., Achasov M. N., Ai X. C., Albayrak O., Albrecht M., Ambrose D. J., ...More

PHYSICAL REVIEW D, vol.91, no.11, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 91 Issue: 11
  • Publication Date: 2015
  • Doi Number: 10.1103/physrevd.91.112005
  • Journal Name: PHYSICAL REVIEW D
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Bursa Uludag University Affiliated: No

Abstract

Using data samples collected with the BESIII detector operating at the BEPCII collider at 17 center-of-mass energies from 3.810 to 4.600 GeV, we perform a study of e(+)e(-) -> eta J/psi and pi(0)J/psi The Born cross sections of these two processes are measured at each center-of-mass energy. The measured energy-dependent Born cross section for e(+)e(-) -> eta J/psi shows an enhancement around 4.2 GeV. The measurement is compatible with an earlier measurement by Belle.