Two-photon contributions to e+e-→ηγ and e+e-→η'γ

被引：9

作者：

Silagadze, Z. K. ^{[1
]}

机构：

[1] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Novosibirsk 630090, Russia

来源：

PHYSICAL REVIEW D | 2006年 / 74卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.74.054003

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Motivated by recent BABAR measurements of the gamma(*)->gamma eta and gamma(*)->gamma eta(') transition form factors, we estimate two-photon exchange contributions to the corresponding cross sections. By using a phenomenological model, based on the vector meson dominance, it is argued that the expected contributions are small enough not to effect the BABAR results. As a by product we predict Br(eta(')->mu(+)mu(-))=(1.4 +/- 0.2)x10(-7). Our results might be useful also in high precision calculations of radiative corrections to the Dalitz decays of pseudoscalar mesons.

引用

页数：12

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