Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2000-01-21
Phys.Lett.B474:188-193,2000
Physics
High Energy Physics
High Energy Physics - Experiment
6 pages, 5 figures, to be published in Physics Letters B
Scientific paper
10.1016/S0370-2693(00)01477-X
The process e+e- ->pi+pi- has been studied with the SND detector at VEPP-2M e+e- collider in the vicinity of phi(1020) resonance. From the analysis of the energy dependence of measured cross section the branching ratio B(phi->pi+pi-)=(7.1+-1.1+-0.9)*10^{-5} and the phase psi_pi=-(34+-4+-3)degrees of interference with the non-resonant pi+pi- production amplitude were obtained.
Achasov M. N.
Beloborodov K. I.
Berdyugin Andrei V.
Bozhenok A. V.
Bukin A. D.
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