Study of the η → e+e-γ Decay Using WASA-at-COSY Detector System

被引：6

作者：

Hodana, Malgorzata ^{[1
]}

Moskal, Pawel ^{[1
]}

机构：

[1] Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland

来源：

MESON 2012 - 12TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS | 2012年 / 37卷

关键词：

TRANSITION FORM-FACTORS;

D O I：

10.1051/epjconf/20123709017

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

At the turn of October and November 2008, the WASA-at-COSY collaboration performed an experiment to collect data on the eta meson decays in pd -> He-3 eta reactions. This report presents results of a study of the eta -> e(+)e(-)gamma conversion decay. The desired feature of this decay is that the final state e(+)e(-) pairs come from the conversion of a virtual y quantum and, therefore, they constitute a rich source of knowledge about the electromagnetic structure of decaying meson. This is a very important characteristic when it comes to study of a short-lived neutral particle like the eta meson, because the classical methods of particle scattering are not applicable here. The analysis performed on one third of the p-d data sample collected using the WASA-at-COSY detector, lead to the extraction of the eta transition form factor as a function of the e(+)e(-) mass and to the calculation of the slope parameter, related to the charge radius of the ri meson.

引用

页数：3

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