CERN Accelerating science

Preprints
Title	LEP W measurements
Author(s)	Saeki, Takayuki (Tokyo U., ICEPP)
Publication	2001
Number of pages	35
Presented at	LEP Symposium 2001 : Beyond the Electroweak Scale, Tokyo, Japan, 5 - 6 Nov 2001
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LEP ; ALEPH CERN LEP ; DELPHI CERN LEP ; L3 CERN LEP ; OPAL
Abstract	In June 1996, the LEP center-of-mass energy was raised to 161 GeV, just above the threshold of pair-production of W bosons, and LEP2 experiments started. ALEPH, DELPHI, L3, and OPAL experiments observed the pair-production of W bosons for the first time in $e^{+}e^{-}$ collisions. Since then, the four experiments had been collecting data successfully at the energies of 161 - 209 GeV, and the data acquisition of LEP experiments was finished on 2nd November 2001. The total integrated luminosities amounted to about 710 pb$^{-1}$ per each experiment and about 46 k W-pair events were produced in total. In this article, the results on W physics in LEP2 are presented, which cover the total cross section of the W boson pair-production, the W decay branching fractions, the triple gauge-boson couplings and the mass of the W boson. All the results are consistent with the Standard Model expectations within the measurement errors.
Other source	Inspire