Evidence for e+e- →γχc1,2 at center-of-mass energies from 4.009 to 4.360 GeV


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

Chinese Physics C, vol.39, no.4, 2015 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 4
  • Publication Date: 2015
  • Doi Number: 10.1088/1674-1137/39/4/041001
  • Journal Name: Chinese Physics C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: decays of hadronic, electron-positron collisions, hadron production by, Heavy quarkonia
  • Ankara University Affiliated: Yes

Abstract

Using data samples collected at center-of-mass energies of s = 4.009, 4.230, 4.260, and 4.360 GeV with the BESIII detector operating at the BEPCII collider, we perform a search for the process e+e- → γχcJ (J=0, 1, 2) and find evidence for e+e- → γχc1 and e+e- → γχc2 with statistical significances of 3.0σ and 3.4σ, respectively. The Born cross sections σB(e+e- → γχcJ), as well as their upper limits at the 90% confidence level (C.L.) are determined at each center-of-mass energy.