a_1(1260) dominance in the process e+e- \to 4\pi at energies 1.05--1.38 GeV

TL;DR

This study measures the e+e- to 4π processes in the 1.05-1.38 GeV range, revealing a dominance of a_1(1260) and ωπ intermediate states, providing new insights into meson interactions at these energies.

Contribution

First experimental measurement of e+e- to 4π processes in this energy range, highlighting a_1(1260) dominance and setting limits on other mechanisms.

Findings

a_1(1260) dominance in the process

Measured energy dependence of e+e- to 4π channels

Set upper limits for alternative mechanisms

Abstract

First results of the study of the process e+e- \to 4\pi by the CMD-2 collaboration at VEPP-2M are presented for the energy range 1.05--1.38 GeV. Using an integrated luminosity of 5.8 pb^{-1}, energy dependence of the processes e+e- \to \pi^+\pi^- 2\pi^0 and e+e- \to 2\pi^+ 2\pi^- has been measured. Analysis of the differential distributions demonstrates the dominance of the a_1\pi and \omega\pi intermediate states. Upper limits for the contributions of other alternative mechanisms are also placed.