ZZ' MIXING AND RADIATIVE-CORRECTIONS AT LEP-I

被引：26

作者：

LEIKE, A ^{[1
]}

RIEMANN, S ^{[1
]}

RIEMANN, T ^{[1
]}

机构：

[1] CERN, DIV THEORY, CH-1211 GENEVA 23, SWITZERLAND

来源：

PHYSICS LETTERS B | 1992年 / 291卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(92)90142-Q

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a method for a common treatment of Z' exchange, QED corrections, and weak loops in e+e--annihilation. QED corrections are taken into account by convoluting a hard scattering cross section containing gamma, Z, and Z' exchange. Weak corrections and ZZ' mixing are treated simultaneously by a generalization of weak form factors. Using the properly extended stan model program for the Z line shape, ZFITTER, we perform and compare two different analyses of the 1990 LEP I data in terms of theories based on the E6-group and in LR-symmetric models. From the LEP I data alone, the ZZ' mixing angle may be limited to \thetaM\ less-than-or-equal-to 0.01 and the Z' mass to M2 > 118-148 GeV, in dependence of the model (95% CL).

引用

收藏

页码：187 / 194

页数：8

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