Constraints on top couplings in models with exotic quarks

被引：111

作者：

del Aguila, F ^{[1
]}

Aguilar-Saavedra, JA

Miquel, R

机构：

[1] Univ Granada, Dept Fis TEor & Cosmos, E-18071 Granada, Spain

[2] Univ Barcelona, Dept ECM, E-08028 Barcelona, Spain

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.82.1628

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The extension of the standard model with exotic quark singlets and doublets introduces large flavor changing neutral couplings between ordinary fermions. We derive inequalities which translate the precise determination of the diagonal Z couplings, in particular, at LEP, into stringent bounds on the off-diagonal ones. The resulting limits can be saturated in minimal extensions with one vector doublet or singlet. In this case, 23 and 6 single top events, respectively, are predicted at LEP2 for an integrated luminosity of 500 pb(-1) per experiment.

引用

页码：1628 / 1631

页数：4

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