Recent Results on ψ(3770) Physics at BES

2009/05/29 by Zhao, M. G., Collaboration, for Bes
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.0905.4820

Abstract

There are about 33, 6.5 and 1.0 pb^-1 of e⁺e^- annihilation data have been taken around the center-of-mass energies of √ s= 3.773 GeV, at √ s= 3.650 GeV and at √ s= 3.6648 GeV, respectively, with the BES-II detector at the BEPC collider. By analyzing these data sets, we have measured the branching fraction for ψ(3770)→ non-D D by several different methods; and have observed an anomalous line shape of σ^e⁺e^-→\rm hadrons in energy region from 3.65 to 3.87 GeV; and have measured the line shapes of the D⁺D^-, D⁰ D⁰ and D D production and together with the ratios of the production rates of D⁺D^- and D⁰ D⁰ in e⁺e^- annihilation around the ψ(3770) resonance.

Related

• Recent Results on ψ(3770) Physics at BES-II
• Recent Results on non-D D decays of ψ(3770) from BES
• Observation of ψ(3770)→ηJ/ψ
• 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'
• Anomalous Line-Shape of Cross Sections for e⁺e^- → \rm Hadrons in the Center-of-Mass Energy Region between 3.650 and 3.872 GeV