Measurement of e+e-ϕη cross sections at center-of-mass energies from 3.508 to 4.951 GeV and search for the decay ψ(3770)ϕη

Collaboration
Jul 24, 2023
14 pages
Published in:
  • Phys.Rev.D 108 (2023) 5, 052015
  • Published: Sep 1, 2023
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Abstract: (APS)
The cross sections of the e+e-ϕη process at center-of-mass energies from 3.508 to 4.951 GeV are measured with high precision using 26.1fb-1 data collected with the BESIII detector operating at the BEPCII storage ring. The cross sections are of the order of a few picobarn and decrease as the center-of-mass energy increases as s-n/2 with n=4.35±0.14. This result is in agreement with the Nambu-Jona-Lasinio model prediction of n=3.5±0.9. In addition, the charmless decay ψ(3770)ϕη is searched for by fitting the measured cross sections, yet no significant signal is observed. The upper limit of B(ψ(3770)ϕη) at the 90% confidence level is determined to be 2.3×10-5.
  • electron positron: annihilation
  • electron positron: colliding beams
  • Phi(1020): electroproduction
  • eta(958): electroproduction
  • channel cross section: measured
  • energy dependence
  • psi(3770): hadronic decay
  • BES
  • Jona-Lasinio-Nambu model
  • Beijing Stor