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In the experiment with the SND detector at the VEPP-2000 $e^+e^-$ colliderthe cross section for the process $e^+e^-\to\eta\pi^+\pi^-$ has been measuredin the center-of-mass energy range from 1.22 to 2.00 GeV. Obtained results arein agreement with previous measurements and have better accuracy. The energydependence of the $e^+e^-\to\eta\pi^+\pi^-$ cross section has been fitted withthe vector-meson dominance model. From this fit the product of the branchingfractions $B(\rho(1450)\to\eta\pi^+\pi^-)B(\rho(1450)\to e^+e^-)$ has beenextracted and compared with the same products for $\rho(1450)\to\omega\pi^0$and $\rho(1450)\to\pi^+\pi^-$ decays. The obtained cross section data have beenalso used to test the conservation of vector current hypothesis.

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Measurement of the $e^+e^- \to \eta\pi^+\pi^-$ cross section in the  center-of-mass energy range 1.22--2.00 GeV with the SND detector at the  VEPP-2000 collider