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We study the e^{+}e^{-} to phi pi pi reaction for pions in an isoscalars-wave which is dominated by loop mechanisms. For kaon loops we start from theconventional RCHPT, but use the unitarized amplitude for KbarK-pipi scatteringand the full kaon form factor instead of the lowest order terms. We study alsoeffects of vector mesons using RCHPT supplemented with the conventionalanomalous term for VVP interactions and taking into account the effects ofheavy vector mesons in the K*K transition form factor. We find a peak in thedipion invariant mass around the f_{0}(980) as in the experiment. Selecting thephi f_{0}(980) contribution as a function of the e^{+}e^{-} energy we alsoreproduce the experimental data except for a narrow peak, yielding support tothe existence of a 1^{--} resonance above the phi f_{0}(980) threshold,coupling strongly to this state.

Electron-positron annihilation into phi f_{0}(980) and clues for a new 1^{--} resonance