Reaction e+e- → π+π-π+π- at energies of √s ≤ 1 GeV

被引：3

作者：

Achasov, N. N. ^{[1
]}

Kozhevnikov, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Branch, Sobolev Inst Math, Novosibirsk 630090, Russia

来源：

JETP LETTERS | 2008年 / 88卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S0021364008130018

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The e(+)e(-) -> pi(+)pi(-)pi(+)pi(-) cross section is calculated for energies of 0.65 <= 1 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 rho(1450) and rho(1700) is necessary for reconciling calculations with the data. It is found that, at root s approximate to 1 GeV, the contributions of the above resonances are much larger, by a factor of 30, than the rho(770) one, and amount to a considerable fraction similar to 0.3-0.6 of the latter at is root s similar to m(rho).

引用

页码：1 / 4

页数：4

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