Beloborodov, K.I.
E+ E- --> PI0 GAMMA
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rivet Analysis
Experimental study of the e+e- -> pi0 gamma process in the energy region sqrt(s)=0.60-0.97 GeV

Achasov, M.N. ; Beloborodov, K.I. ; Berdugin, A.V. ; et al.
Phys.Lett.B 559 (2003) 171-178, 2003.
Inspire Record 612867 DOI 10.17182/hepdata.41964

Results of the study of the e+e-->pi0 gamma process with SND detector at VEPP-2M collider in the c.m.s. energy range sqrt(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-->pi0 gamma 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 phi,omega,rho0->pi0 gamma decay contributions with measured decay probabilities: Br(omega->pi0 gamma)=(9.34+-0.15+-0.31)% and Br(rho0->pi0 gamma)=(5.15+-1.16+-0.73)*10^-4 . The rho-omega relative interference phase is phi(rho,omega}=(-10.2+-6.5+-2.5) degree.

2 data tables
Table 1

Measured E+ E- --> PI0 GAMMA cross section.

Table 2

Total cross section into OMEGA and RHO0 channels.