Z lineshape versus fourth-generation masses

被引：12
作者：
Bulanov, SS [1 ]
Novikov, VA [1 ]
Okun, LB [1 ]
Rozanov, AN [1 ]
Vysotsky, MI [1 ]
机构：
[1] Inst Theoret & Expt Phys, Moscow 117259, Russia
来源：
PHYSICS OF ATOMIC NUCLEI | 2003年 / 66卷 / 12期
关键词：
D O I：
10.1134/1.1634324
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The dependence of the Z-resonance shape on the location of the threshold of the N (N) over bar production (N is the fourth-generation neutrino) is analyzed. The bounds on the existence of the fourth generation are derived from the comparison of the theoretical expression for the Z lineshape with the experimental data. The fourth generation is excluded at 95% C.L. for (mN) < 46.7 +/- 0.2 GeV (C) 2003 MAIK "Nauka/Interperiodica".
引用
收藏
页码：2169 / 2177
页数：9
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