Z-DECAY CONFRONTS NONSTANDARD SCENARIOS

被引：25

作者：

BHATTACHARYYA, G

RAYCHAUDHURI, A

DATTA, A

GANGULI, SN

机构：

[1] JADAVPUR UNIV,DEPT PHYS,CALCUTTA 700032,W BENGAL,INDIA

[2] TATA INST FUNDAMENTAL RES,BOMBAY 400005,INDIA

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 24期

关键词：

22;

D O I：

10.1103/PhysRevLett.64.2870

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that recent data from the CERN e+e- collider LEP on the Z line shape and decays give stringent new constraints on mixing of e and with exotics and Z-Z mixing. Even in nonstandard models, where both the visible and the invisible part of the Z width are modified, a fourth light neutrino is unlikely unless substantial mixings between neutrinos and exotics are allowed. If the gluino is detectable at the Fermilab Tevatron then the lighter-chargino mass is tightly constrained (42 GeV). © 1990 The American Physical Society.

引用

页码：2870 / 2873

页数：4

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