A GENERAL SUM-RULE FOR THE TOP MASS FROM B-PHYSICS ON Z-RESONANCE

被引：42

作者：

BOUDJEMA, F

DJOUADI, A

VERZEGNASSI, C

机构：

[1] RHEIN WESTFAL TH AACHEN,W-5100 AACHEN,GERMANY

[2] LAB ANNECY LE VIEUX PHYS PARTICULES,F-74941 ANNECY LE VIEUX,FRANCE

来源：

PHYSICS LETTERS B | 1990年 / 238卷 / 2-4期

关键词：

D O I：

10.1016/0370-2693(90)91759-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We derive a sum rule that provides an expression for the top mass in terms of a special combination of quantities that might be measured in a near future at LEP. These include the ratio of the Z width into b quarks to the width into charged leptons, and the forward-backward asymmetry for b quark production on Z resonance. The sum rule frees the top contribution from other possible terms that would cause a redefinition of the ρ parameter. This remarkable property is valid both in the standard model and in a rather large variety of models of new physics. Assuming a realistic overall accuracy, the presence of a top heavier than ∼ 150 GeV would not escape a clean experimental identification. © 1990.

引用

页码：423 / 430

页数：8

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