HARD PHOTON PAIR PRODUCTION AT LEP

被引：4

作者：

BALLESTRERO, A ^{[1
]}

MAINA, E ^{[1
]}

MORETTI, S ^{[1
]}

机构：

[1] UNIV TURIN,DIPARTIMENTO FIS TEOR,I-10124 TURIN,ITALY

来源：

PHYSICS LETTERS B | 1993年 / 305卷 / 03期

关键词：

D O I：

10.1016/0370-2693(93)90124-Z

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The production of photon pairs in e+e- --> ffgammagammaBAR processes is studied using exact helicity amplitudes at tree level. Total cross sections, including initial state radiation effects, are given. They are presented in the case of quarks as a function of y(cut) in the JADE algorithm. In the case of leptons we use cuts similar to the ones employed in a recent L3 analysis. Masses of the final state fermions are taken into account when appropriate. The cross section e+e- --> tau+tau-gammagamma is about 10% larger when the tau mass is neglected. We obtain, with a different method, results which are in good agreement with L3 Monte Carlo simulation.

引用

页码：312 / 316

页数：5

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