Open AccessThe first measurement of the left-right cross section asymmetry in Z° boson production
Author(s) -
R. Ben-David
Publication year - 1994
Language(s) - English
Resource type - Reports
DOI - 10.2172/10194899
Subject(s) - physics , electroweak interaction , particle physics , nuclear physics , collider , asymmetry , electron–positron annihilation , cross section (physics) , weinberg angle , cathode ray , electron , center of mass (relativistic) , polarization (electrochemistry) , boson , lepton , hadron , chemistry , quantum mechanics , energy–momentum relation , classical mechanics
The first measurement of the left-right cross section asymmetry (A{sub LR}) in Z{sup 0} boson production has been made with the SLAC Large Detector (SLD) at the SLAC Linear Collider (SLC). The measurement was performed at a center-of-mass energy (E{sub cm}) of 91.55 GeV with a longitudinally polarized electron beam. The average beam polarization was (22.4 {+-} 0.6)%. Using a sample of 10,224 Z{sup 0} decays, A{sub LR} is measured to be 0.102 {+-} 0.O44(stat) {+-} 0.003(syst), which determines the effective electroweak mixing angle to be sin{sup 2} {theta}{sub W}{sup eff} = 0.2375 {+-} 0.0056(stat) {+-} 0.0004(syst).
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