Extra generations and discrepancies of electroweak precision data

被引：98

作者：

Novikov, VA ^{[1
]}

Okun, LB

Rozanov, AN

Vysotsky, MI

机构：

[1] ITEP, Moscow, Russia

[2] Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France

来源：

PHYSICS LETTERS B | 2002年 / 529卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1016/S0370-2693(02)01240-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

It is shown that additional chiral generations are not excluded by the latest electroweak precision data if one assumes that there is no mixing with the known three generations. In the case of "heavy extra generations", when all four new particles are heavier than Z boson, quality of the fit for the one new generation is as good as for zero new generations (Standard Model). In the case of neutral leptons with masses around 50 GeV ("partially heavy extra generations") the minimum of chi(2) is between one and two extra generations. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：111 / 116

页数：6

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