Total cross-section and diffractive p0 production in γγ collisions at L3

被引：8

作者：

Csilling, A ^{[1
]}

机构：

[1] KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2000年 / 82卷

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/S0920-5632(00)00159-6

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：

The reaction e(+)e(-) --> e(+)e(-)gamma*gamma* --> e(+)e(-) hadrons is analysed for quasi-real virtual photons using data collected by the L3 detector during the LEP high energy runs at root s = 183 and 189 GeV. Preliminary results on the cross sections sigma(e(+)e(-) --> e(+)e(-) hadrons) and sigma(gamma gamma --> hadrons) are given in the interval 5 GeV less than or equal to W-gamma gamma less than or equal to 145 GeV. The centre-of-mass energy dependence of the two-photon cross section is well described by the universal Regge parametrisation, but with a steeper rise with energy as compared to hadron-hadron cross sections. The data are also compared to the expectations of different theoretical models. To investigate diffractive processes, the elastic gamma gamma --> rho(0)rho(0) process and the inclusive rho(0) production gamma gamma --> rho(0)X are studied in the W-gamma gamma greater than or equal to 3 GeV region. In all channels a comparison is made with the PYTHIA and PHOJET Monte Carlo generators.

引用

页码：239 / 245

页数：7

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