Pion form factor and reactions e+ e- → ωπ○ and e+ e- → π+π-π+π- at energies up to 2-3 GeV in the many- channel approach

被引：7

作者：

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

Kozhevnikov, A. A. ^{[1
,2
]}

机构：

[1] SL Sobolev Inst Math, Theoret Phys Lab, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

PHYSICAL REVIEW D | 2013年 / 88卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

HLS MODEL; SYMMETRY; BREAKING; RANGE; RHO;

D O I：

10.1103/PhysRevD.88.093002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the field-theory-inspired expression for the pion electromagnetic form factor F-pi,F- a good description of the data in the range -10< s< 1 GeV2 is obtained upon taking into account the pseudoscalar-pseudoscalar ( PP) loops. When the vector-pseudoscalar ( VP) and the axial vector-pseudoscalar ( AP) loops are taken into account in addition to the PP ones, a good description of the BABAR data on the reaction e(+) e--> pi(+)pi is obtained at energies up to 3 GeV. The inclusion of the VP and AP loops demands the treatment of the reactions e(+) e--> omega pi circle and e(+) e--> pi(+)pi(-)pi(+)pi This task is performed with the SND data on e(+) e production and the BABAR data on pi(+)pi(-)pi(+)pi production, both in e_e annihilation, by taking into account rho(770) and the heavier rho(1450), rho(1700), and rho(2100) resonances. The problems arising from including the VP and AP loops are pointed out and discussed.

引用

页数：13

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