Decay phi->pi+pi-
  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. 
M.N.Achasov, K.I.Beloborodov, A.V.Berdyugin, A.V.Bozhenok, A.D.Bukin,   D.A.Bukin, S.V.Burdin, T.V.Dimova, V.P.Druzhinin, M....