Analysis of e + e −→π+π−π+π− and e + e −→π+π−π0π0 processes in the energy range of $$sqrt 2 = 0.98 - 1.38 GeV$$ in experiments with a spherical neutral detector

1 May 2003

journal article
Published by Pleiades Publishing Ltd in Journal of Experimental and Theoretical Physics

Vol. 96 (5) , 789-800
https://doi.org/10.1134/1.1581933

Abstract

The cross sections of the e⁺e⁻→π⁺π⁻π ⁺π⁻, e⁺e⁻→π⁺π⁻π⁰π ⁰, and e⁺e⁻→ωπ→ π⁺π⁻π ⁰π⁰ processes, as well as the e⁺e⁻→π⁺π⁻π⁰π⁰ process with subtracted contribution of the ωπ intermediate state, are measured in experiments with a spherical neutral detector on the VEPP-2M collider in the energy range 0.98–1.38 GeV. About 41 000 events of the e⁺e⁻→π⁺π⁻π⁺π ⁻ process and more than 54 000 events of the e⁺e⁻→π⁺π ⁻π⁰π⁰ process have been selected in experiment. The statistical error in determining the cross section is 2–20%, while the systematic error is 7 and 8%.

Keywords

This publication has 19 references indexed in Scilit:

Masses, branching ratios, and full widths of heavy ρ′, ρ″ and ω′, ω″ resonances
Physical Review D, 2000
Spherical neutral detector for VEPP-2M collider
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2000
Resonant structure of $\vec{τ} 3 π π^{0} ν_{τ}$ and $\vec{τ} ω π ν_{τ}$ decays
Physical Review D, 2000
Measurement of the spectral functions of vector current hadronic tau decays
The European Physical Journal C, 1997
$ρ^{'}$ ’s in analyzing $e^{+} e^{-}$ annihilation: Mark III, LASS, and ARGUS data
Physical Review D, 1997
Higher vector meson states produced in electron-positron annihilation
The European Physical Journal C, 1994
Four-quark and hybrid mixing in the light-quark vector sector
The European Physical Journal C, 1993
A candidate for a four-quark vector-meson?
The European Physical Journal C, 1993
Is there an excitation of the ϱ at 1.27 GeV?
Physics Letters B, 1991
Evidence for ϱ1(1270) production in the reaction K−p → π+π−Λ
Nuclear Physics B - Proceedings Supplements, 1991