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

  • Author(s): Schael, S;
  • Barate, R;
  • Brunelière, R;
  • Buskulic, D;
  • De Bonis, I;
  • Decamp, D;
  • Ghez, P;
  • Goy, C;
  • Jézéquel, S;
  • Lees, JP;
  • Lucotte, A;
  • Martin, F;
  • Merle, E;
  • Minard, MN;
  • Nief, JY;
  • Odier, P;
  • Pietrzyk, B;
  • Trocmé, B;
  • Bravo, S;
  • Casado, MP;
  • Chmeissani, M;
  • Comas, P;
  • Crespo, JM;
  • Fernandez, E;
  • Fernandez-Bosman, M;
  • Garrido, L;
  • Grauges, E;
  • Juste, A;
  • Martinez, M;
  • Merino, G;
  • Miquel, R;
  • Mir, LM;
  • Orteu, S;
  • Pacheco, A;
  • Park, IC;
  • Perlas, J;
  • Riu, I;
  • Ruiz, H;
  • Sanchez, F;
  • Colaleo, A;
  • Creanza, D;
  • De Filippis, N;
  • de Palma, M;
  • Iaselli, G;
  • Maggi, G;
  • Maggi, M;
  • Nuzzo, S;
  • Ranieri, A;
  • Raso, G;
  • Ruggieri, F;
  • Selvaggi, G;
  • Silvestris, L;
  • Tempesta, P;
  • Tricomi, A;
  • Zito, G;
  • Huang, X;
  • Lin, J;
  • Ouyang, Q;
  • Wang, T;
  • Xie, Y;
  • Xu, R;
  • Xue, S;
  • Zhang, J;
  • Zhang, L;
  • Zhao, W;
  • Abbaneo, D;
  • Bazarko, A;
  • Becker, U;
  • Boix, G;
  • Bird, F;
  • Blucher, E;
  • Bonvicini, B;
  • Bright-Thomas, P;
  • Barklow, T;
  • Buchmüller, O;
  • Cattaneo, M;
  • Cerutti, F;
  • Ciulli, V;
  • Clerbaux, B;
  • Drevermann, H;
  • Forty, RW;
  • Frank, M;
  • Greening, TC;
  • Hagelberg, R;
  • Halley, AW;
  • Gianotti, F;
  • Girone, M;
  • Hansen, JB;
  • Harvey, J;
  • Jacobsen, R;
  • Hutchcroft, DE;
  • Janot, P;
  • Jost, B;
  • Knobloch, J;
  • Kado, M;
  • Lehraus, I;
  • Lazeyras, P;
  • Maley, P;
  • Mato, P;
  • May, J
  • et al.

Published Web Location
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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 3fb-1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130GeV to 209GeV. 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 g1Z, κγ and λγ are determined to be: mW=80.376±0.033GeV ΓW=2.195±0.083GeV B(W→had)=67.41±0.27% g1Z=0.9840+0.018-0.020 κγ=0.982±0.042λγ=-0.022±0.019. © 2013 Elsevier B.V.

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