Charge asymmetry and radiative φ decays

被引：38

作者：

Czyz, H

Grzelinska, A

Kühn, JH

机构：

[1] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

[2] Univ Karlsruhe, Inst Theoret Teilchenphys, D-76128 Karlsruhe, Germany

来源：

PHYSICS LETTERS B | 2005年 / 611卷 / 1-2期

关键词：

radiative return; radiative phi decays;

D O I：

10.1016/j.physletb.2005.02.027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The study of radiative phi decays into scalar mesons, with subsequent decay into pi pi gamma, constitutes an important topic at the electron-positron collider DAPHNE. The interference of the respective amplitude with the one for pi(+)pi(-)gamma production, where the photon originates from initial state radiation, will allow for unambiguous tests of models for the phi -> gamma f(0)(->pi pi) amplitude. The forward-backward asymmetry of charged pions, which is a clear signal of such an interference, amounts up to 30% and is at the same time quite sensitive to the details of the various amplitudes. The results for several characteristic cases are presented and their implementation into the Monte Carlo generator PHOKHARA is described. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：116 / 122

页数：7

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