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Título

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

AutorFernández Menéndez, Javier CSIC ORCID; Gómez-Ceballos, Guillelmo; Marco, Jesús CSIC ORCID ; Marco, Rafael CSIC; Martínez-Rivero, Celso CSIC ORCID ; Matorras, Francisco CSIC ORCID ; Piedra, Jonatan CSIC ORCID ; Rivero, M.; Rodríguez, David; Costa, María José CSIC ORCID; Ferrer, Antonio CSIC ORCID; Fuster, Juan CSIC ORCID; García García, Carmen CSIC ORCID; Oyanguren, Arantza CSIC ORCID; Perepelitsa, Vassil; Salt, José CSIC ORCID; Tortosa, Pablo CSIC
Palabras claveElectron–positron physics
Decays of heavy intermediate gauge bosons
Electroweak interactions
Fecha de publicación30-nov-2013
EditorElsevier
CitaciónPhysics Reports 532(4): 119-244 (2013)
ResumenElectroweak 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 W W and Z Z 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 W W 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 g1 Z, κγ and λγ are determined to be: mW=80.376±0.033 GeV ΓW=2.195±0.083 GeV B(W→had)=67.41±0.27% g1 Z=0.9840+0.018 -0.020 κγ=0.982±0.042λγ=-0.022±0.019.
DescripciónThe ALEPH, DELPHI, L3, OPAL collaborations and LEP Electroweak Working Group.-- arXiv:1302.3415
Versión del editorhttp://dx.doi.org/10.1016/j.physrep.2013.07.004
URIhttp://hdl.handle.net/10261/109262
DOI10.1016/j.physrep.2013.07.004
Identificadoresissn: 0370-1573
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