Measurement of the angular distribution of electrons from W→eν decays observed in p(p)over-bar collisions at √s=1.8 TeV

被引：1
|
作者：
Steinbrück, G [1 ]
机构：
[1] Columbia Univ, Nevis Labs, Irvington, NY 10533 USA
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS A | 2001年 / 16卷
关键词：
D O I：
10.1142/S0217751X01006802
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：
We present the first measurement of the electron angular distribution parameter alpha(2) in W --> ev events produced in proton-antiproton collisions as a function of the W boson transverse momentum. Our analysis is based on data collected using the DO detector during the 1994-1995 Fermilab Tevatron run. We compare our results with next-to-leading order perturbative QCD, which predicts an angular distribution of (1 +/- alpha(1) COStheta* + alpha(2) COS(2)theta*), where theta* is the polar angle of the electron in the Collins-Soper frame and alpha(1) and alpha(2) are functions of p(T)(W), the W boson transverse momentum. This measurement provides a test of next-to-leading order QCD corrections which are a non-negligible contribution to the W boson mass measurement.
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页码：318 / 321
页数：4
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