WW cross sections and W branching fractions in L3

被引：0
|
作者：
Malgeri, L [1 ]
机构：
[1] Univ Geneva, CH-1211 Geneva 23, Switzerland
[2] CERN, Div EP, CH-1211 Geneva, Switzerland
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2001年 / 16卷
关键词：
D O I：
10.1142/S0217751X01006838
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 measurements of W-pair cross sections performed by the L3 experiment at the LEP collider are herein reported. The statistics collected in the period 1996-2000 amounts to more than 8000 events distributed over a large center-of-mass energy rangec 161-208 GeV. From the cross section measurements, also the W branching fractions in leptons and hadrons are derived with a percent precision: BR(W-->qq) = 68.47 +/- 0.49 +/- 0.33% and BR(W--> lv) = 10.51 +/- 0.16 +/- 0.11%. The improving statistical accuracy of the measurements is now approaching the systematic uncertainties. Further studies, necessary also for the W mass determination, will be needed in the near future to keep them under control.
引用
收藏
页码：329 / 332
页数：4
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