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

页码：329 / 332

页数：4

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