Experimental study of the e+e-→π0γ process in the energy region s=0.60-0.97 GeV
Abstract
Results of the study of the e+e-→π0γ process with SND detector at VEPP-2M collider in the c.m.s. energy range s=0.60-0.97 GeV are presented. Using 36513 selected events, corresponding to a total integrated luminosity of 3.4 pb-1, the e+e-→π0γ cross section was measured. The energy dependence of the cross section was analyzed in the framework of the vector meson dominance model. The data are well described by a sum of φ,ω,ρ→π0γ decay contributions with measured decay probabilities: Br(ω→π0γ)=(9.34±0.15±0.31)% and Br(ρ0→π0γ)=(5.15±1.16±0.73)×10-4. The ρ-ω relative interference phase is ϕρω=(-10.2±6.5±2.5) degrees.
- Publication:
-
Physics Letters B
- Pub Date:
- May 2003
- DOI:
- 10.1016/S0370-2693(03)00336-8
- arXiv:
- arXiv:hep-ex/0302004
- Bibcode:
- 2003PhLB..559..171A
- Keywords:
-
- Magnetic dipole transitions;
- Rho meson;
- Omega meson;
- Cross section;
- High Energy Physics - Experiment
- E-Print:
- Phys.Lett.B559:171-178,2003