TY - JOUR

T1 - Electroweak measurements in electron–positron collisions at W-boson-pair energies at LEP

AU - Bailey, Ian Richard

AU - Bouhova-Thacker, Evelina Vassileva

AU - Bowdery, Christopher Keith

AU - Finch, Alexander John

AU - Hughes, Gareth

AU - Jones, Roger William Lewis

AU - Kartvelishvili, Vakhtang

AU - Sloan, Terence

AU - Smizanska, Maria

AU - ALEPH Collaboration

AU - DELPHI Collaboration

AU - L3 Collaboration

AU - OPAL Collaboration

AU - LEP Electroweak Working Group

PY - 2013/11/30

Y1 - 2013/11/30

N2 - Electroweak measurements performed with data taken at the electron–positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3 fb−1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130 GeV to 209 GeV.Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant WW and ZZ production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron–positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose–Einstein correlations between the two W decay systems arising in WW production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, mW and ΓW, the branching fraction of W decays to hadrons, B(W → had), and the trilinear gauge-boson self-couplings gZ1, κγ and λγ are determined to be:mW = 80.376 ± 0.033 GeVΓW = 2.195 ± 0.083 GeVB(W → had) = 67.41 ± 0.27%gZ1 = 0.984+0.018−0.020κγ = 0.982 ± 0.042λγ = −0.022 ± 0.019.

AB - Electroweak measurements performed with data taken at the electron–positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3 fb−1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130 GeV to 209 GeV.Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant WW and ZZ production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron–positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose–Einstein correlations between the two W decay systems arising in WW production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, mW and ΓW, the branching fraction of W decays to hadrons, B(W → had), and the trilinear gauge-boson self-couplings gZ1, κγ and λγ are determined to be:mW = 80.376 ± 0.033 GeVΓW = 2.195 ± 0.083 GeVB(W → had) = 67.41 ± 0.27%gZ1 = 0.984+0.018−0.020κγ = 0.982 ± 0.042λγ = −0.022 ± 0.019.

U2 - 10.1016/j.physrep.2013.07.004

DO - 10.1016/j.physrep.2013.07.004

M3 - Journal article

VL - 532

SP - 119

EP - 244

JO - Physics Reports

JF - Physics Reports

SN - 0370-1573

IS - 4

ER -