Reaction
e+e-→π+π-π+π- at energies
![\boldsymbol{\sqrt{s}\leq1 }](/img/latex/ae/ae3956fb66008cb2591aac51f5c6f999-v2.png)
GeV
N. N. Achasov, A. A. Kozhevnikov
S.L. Sobolev Institute for Mathematics, Siberian Branch of RAS, 630090 Novosibirsk, Russia
PACS: 11.30.Rd, 12.39.Fe, 13.30.Eg
Abstract
The cross section of reaction
e+e-→π+π-π+π- is calculated for energies
GeV in the framework of the generalized
hidden local symmetry model. The calculations are compared with
the data of CMD-2 and BaBaR. It is shown that the inclusion of
heavy isovector resonances ρ(1450) and ρ(1700) is
necessary for reconciling calculations with the data. It is found
that at
GeV the contributions of above
resonances are much larger, by the factor of 30, than the
ρ(770) one, and are amount to a considerable fraction
of the latter at
.