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Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP

S. Schael A. Blondel 1 M. Swynghedauw 1 J. Abdallah 2 P. Antilogus 2 J.E. Augustin 2 M. Baubillier 2 E. Ben-Haim 2 M. Berggren 2 W. da Silva 2 F. Kapusta 2 A. Savoy-Navarro 2 R. Barbier 3 R. Chierici 3 A. Duperrin 3 P. Jonsson 3 S. Katsanevas 3 G. Smadja 3 P. Verdier 3 P. Achard M. Chemarin 3 H. El Mamouni 3 J. Fay 3 G. Grenier 3 I. Laktineh 3 P. Lebrun 3 J.-P. Martin 3 G.-S. Muanza 3 C. Souga 3 B. Tellili 3 D. Teyssier 3 G. Abbiendi Y. Arnoud 4 C. Bérat 4 F. Ledroit 4 J. Boucrot 5 O. Callot 5 M. Davier 5 L. Duflot 5 J.-F. Grivaz 5 Ph. Heusse 5 A. Jacholkowska 5 F. Le Diberder 5 J. Lefrancois 5 M.-H. Schune 5 L. Serin 5 J.-J. Veillet 5 I. Videau 5 D. Zerwas 5 P. Bambade 5 B. Bouquet 5 G. Cosme 5 F. Fulda-Quenzer 5 G. Grosdidier 5 V. Lepeltier 5 F. Richard 5 P. Roudeau 5 A. Stocchi 5 Sw. Banerjee 6 J.J. Blaising 6 G. Coignet 6 D. Duchesneau 6 D. Perret-Gallix 6 S. Rosier-Lees 6 M. Vivargent 6 R. Barate 6 R. Brunelière 6 I. de Bonis 6 D. Decamp 6 P. Ghez 6 C. Goy 6 S. Jézéquel 6 J.P. Lees 6 A. Lucottte 6 F. Martin 6 E. Merle 6 M.N. Minard 6 J.-Y. Nief 6 P. Odier 6 B. Pietrzyk 6 B. Trocmé 6 Ziad Ajaltouni 7 F. Badaud 7 G. Chazelle 7 O. Deschamps 7 S. Dessagne 7 Alain Falvard 7, 8 C. Ferdi 7 D. Fayolle 7 Pascal Gay 7 C. Guicheney 7 Pierre Henrard 7 J. Jousset 7 B. Michel 7 S. Monteil 7 Jean-Claude Montret 7 D. Pallin 7 J M. Pascolo 7 Pascal Perret 7 F. Podlyski 7
Abstract : 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, $M_W$ and $\Gamma_W$, the branching fraction of W decays to hadrons, $B(W\to\mathrm{had})$, and the trilinear gauge-boson self-couplings $g^Z_1$, $\kappa_\gamma$ and $\lambda_\gamma$ are determined to be: M_W = 80.376 \pm 0.033 ~GeV \Gamma_W = 2.195 \pm 0.083 ~GeV B(W\to\mathrm{had}) = 67.41 \pm 0.27 % g^Z_1 = 0.984 ^{+0.018}_{-0.020} \kappa_\gamma = 0.982 \pm 0.042 \lambda_\gamma = -0.022 \pm 0.019
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Submitted on : Monday, July 29, 2013 - 11:36:25 AM
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S. Schael, A. Blondel, M. Swynghedauw, J. Abdallah, P. Antilogus, et al.. Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP. Physics Reports, Elsevier, 2013, 532, pp.119-244. ⟨10.1016/j.physrep.2013.07.004⟩. ⟨in2p3-00848801⟩

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