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Spin-Momentum Correlation (Handedness) in the Process of Four Pions Production in the Electron-Positron Collisions
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Spin-Momentum Correlation (Handedness) in the Process of Four Pions Production in the Electron-Positron Collisions
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We discuss special type of polarization asymmetry (``handedness") in the process $e^+e^-\to 4\pi$, when one of initial particles is longitudinally polarized. The asymmetry is proportional to the degree of polarization and to the width to mass ratio of rho-meson. It can reach 4-5\% in some kinematical region. Both channels $2 \pi^+ 2 \pi^-$ and $2 \pi^0 \pi^+ \pi^-$ are considered in the framework of the effective chiral lagrangian with vector mesons, in the energy range $\sim 1$ GeV. The corresponding total cross sections are also calculated.
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