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

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104570

Title:	Electroweak measurements in electron-positron collisions at W-boson-pair energies at LEP
Authors:	林宗泰;Giacomelli, G;Lafferty, G.D;Losty, M.J;Kraber, M;Foucher, M;Berggren, M;Nessi-Tedaldi, F;Hoffman, K;Lehto, M;Sciacca, C;Goodsir, S;Sarkisyan, E.K.G;Fernandez-Bosman, M;Ruggieri, F;Barklow, T;White, R;Zhang, L;Tortosa, P;Lutters, G;Igo-Kemenes, P;Hocker, A;Koetke, D.S;Huang, X;Palacios, J.P;Tkatchev, L;Delaere, C;Shears, T.G;Marco, J;Scott, W.G;Treille, D;Contri, R;Ranieri, R;Burckhart, H.J;Meschini, M;Hughes, G;Wickens, J;Sharma, V;Razis, P;Eigen, G;Gomez-Ceballos, G;Sudhakar, K;Coyle, P;Rykaczewski, H;Ferrer, A;Wasserbaech, S;Kucharczyk, M;Borean, C;Waller, D;Likhoded, S;Homer, R.J;Shivarov, N;Sloan, T;Lynch, J.G;Lin, C.H;Williams, M.I;Lusiani, A;Conway, J.S;Fierro, M;Krieger, P;Orito, S;Kirkby, J;Rahaman, M.A;Chiarella, V;Eline, A;Blyth, S.C;Kim, H.Y;Littlewood, C;Bettarini, S;Gao, Y;Ward, D.R;Spassov, T;Cavanaugh, R;Shvorob, A;Capon, G;Oakham, F.G;Strohmer, R;Wu, X;Blaising, J.J;Hughes-Jones, R.E;Van de Walle, R.T;Zimine, N.I;Poireau, V;Beuselinck, R;Josa-Mutuberria, I;Reucroft, S;Tafirout, R;Yekutieli, G;Dova, M.T;von Torne, E;Adzic, P;Siebel, M;Lebrun, P;Ziegler, T;Sguazzoni, G;Saeki, T;Bechtluft, J;Lai, W.P;Mikenberg, G;Beeston, C;Baldew, S.V
Contributors:	理學院物理學系
Keywords:	[formula omitted] boson;Decays of heavy intermediate gauge bosons;Effective coupling constants;Electron-positron physics;Electroweak interactions;Experiment;Fermion-antifermion production;Fysik;Higgs boson;High Energy Physics - Experiment;High Energy Physics - Phenomenology;Natural Sciences;Naturvetenskap;Neutral weak current;Particle Physics;Physical Sciences;Physics;Precision measurements at [formula omitted]-pair energies;Precision measurements at W-pair energies;Radiative corrections;Subatomic Physics;Subatom�r fysik;Tests of the Standard Model;Top quark;W boson;Z boson
Date:	2013-11-30
Issue Date:	2026-04-23 11:52:50 (UTC+8)
Publisher:	Elsevier;Elsevier B.V
Abstract:	摘要： 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: \begin{equation} m_W = 80.376 \pm 0.033 GeV \end{equation} \begin{equation}\Gamma_W = 2.195 \pm 0.083 GeV\end{equation} \begin{equation} B(W \to\mathrm{had}) = 67.41 \pm 0.27\% \end{equation} \begin{equation} g^Z_1 = 0.984 ^{+0.018}_{-0.020}\end{equation} \begin{equation} \kappa_\gamma = 0.982 \pm 0.042\end{equation} \begin{equation}\lambda_\gamma = -0.022 \pm 0.019 \end{equation} 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 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=0.984−0.020+0.018 κγ=0.982±0.042 λγ=−0.022±0.019. 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 出版者： Elsevier B.V 出版日期： 2013 出處： Physics reports, 2013, Vol.532 (4), p.119-244 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2013 Elsevier B.V. 版權： CC0 1.0 - Universal 識別號： ISSN: 0370-1573 識別號： ISSN: 1873-6270 識別號： EISSN: 1873-6270 識別號： DOI: 10.1016/j.physrep.2013.07.004
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