Publication
Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP
| dc.contributor.author | ALEPH, DELPHI, L3, OPAL, LEP Electroweak collaboration (1644 authors) | |
| dc.contributor.author | David, A. | |
| dc.contributor.author | Abreu, P. | |
| dc.contributor.author | Andringa, S. | |
| dc.contributor.author | Anjos, N. | |
| dc.contributor.author | Castro, N. | |
| dc.contributor.author | De Angelis, A. | |
| dc.contributor.author | Espirito Santo, M.C. | |
| dc.contributor.author | Goncalves, P. | |
| dc.contributor.author | Onofre, A. | |
| dc.contributor.author | Pimenta, M. | |
| dc.contributor.author | Tome, B. | |
| dc.contributor.author | Veloso, F. | |
| dc.date.accessioned | 2019-02-03T22:28:48Z | |
| dc.date.available | 2019-02-03T22:28:48Z | |
| dc.date.issued | 2013 | |
| dc.date.updated | 2019-02-03T22:28:47Z | |
| dc.description.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 | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Phys.Rept. 532 (2013) 119-244; DOI 10.1016/j.physrep.2013.07.004 | |
| dc.identifier.uri | http://dx.doi.org/10.1016/j.physrep.2013.07.004 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26386 | |
| dc.language.iso | eng | |
| dc.title | Electroweak Measurements in Electron-Positron Collisions at W-Boson-Pair Energies at LEP | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |