Measurement of the W-pair cross section in e+e− collisions at 172 GeV

Barate, R.; Buskulic, D.; Décamp, D.; Ghez, Philippe; Goy, C.; Lees, J. P.; Lucotte, A.; Minard, M.-N.; Nief, J.Y.; Pietrzyk, B.; Casado, M. P.; Chmeissani, M.; Comas, P.; Crespo, J.M.; Delfino, M.; Fernández, E.; Fernández-Bosman, M.; Garrido, Ll.; Rozas, A. Juste; Martı́nez, M.; Merino, G.; Miquel, R.; Mir, L. M.; Aranda, C. Padilla; Park, I.C; Pascual, Á.; Perlas, J. A.; Riu, I.; Sanchez, F. J. Munoz; Teubert, F.; Colaleo, A.; Creanza, D.; Palma, M. De; Gelao, G.; Iaselli, G.; Mäggi, G.; Maggi, M.; Marinelli, N.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X. T.; Lin, J.; Ouyang, Q.; Wang, T; Xie, Y.; Xu, R.; Xue, S.; Zhang, J; Zhang, L; Zhao, W.; Abbaneo, D.; Alemany, R.; Bazarko, A.O.; Becker, U.; Bright-Thomas, P.; Cattaneo, M.; Cerutti, F.; Dissertori, G.; Drevermann, H.; Forty, R.; Frank, M.; Hagelberg, R.; Hansen, J. B.; Harvey, J.; Janot, P.; Jost, B.; Kneringer, E.; Knobloch, J.; Lehraus, I.; Mató, P.; Minten, A.; Moneta, L.; Pacheco, A.; Pusztaszeri, J. F.; Ranjard, F.; Rizzo, G.; Rolandi, G.; Rousseau, D.; Schlatter, D.; Schmitt, M.; Schneider, O.; Tejessy, W.; Tomalin, I. R.; Wachsmuth, H.; Wagner, A.; Ajaltouni, Z.; Barrès, A.; Boyer, C.; Falvard, A.; Ferdi, C.; Guicheney, C.; Henrard, P.; Jousset, J.; Michel, B.; Monteil, S.; Montret, J. C.; Pallin, D.; Perret, P.; Podlyski, F.; Proriol, J.; Rosnet, P.; Rossignol, J. M.; Fearnley, T.; Hansen, J. D.; Hansen, J. R.; Hansen, P. H.; Nilsson, B.S.; Rensch, B.; Wäänänen, A.; Daskalakis, G.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Blondel, A.; Brient, J. C.; Machefert, F.; Rougé, A.; Rumpf, M.; Valassi, A.; Videau, H.; Focardi, E.; Parrini, G.; Zachariadou, K.; Cavanaugh, R.; Corden, M.; Georgiopoulos, C.; Huehn, T.; Jaffe, D. E.; Antonelli, A.; Bencivenni, G.; Bologna, G.; Bossi, F.; Campana, P.; Capon, G.; Casper, D.; Chiarella, V.; Felici, G.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, F.; Passalacqua, L.; Pepe-Altarelli, M.; Curtis, L.; Dorris, S. J.; Halley, A.W.; Knowles, I. G.; Lynch, J.G.; O’Shea, V.; Raine, C.; Scarr, J. M.; Smith, K. M.; Teixeira-Dias, P.; Thompson, A. S.; Thomson, E.; Thomson, F.; Turnbull, R.M.; Ward, J. J.; Buchmüller, O.; Dhamotharan, S.; Geweniger, C.; Graefe, G.; Hanke, P.; Hansper, G.; Hepp, V.; Kluge, E. E.; Putzer, A.; Sommer, J.; Tittel, K.; Werner, S.; Wunsch, M.; Beuselinck, R.; Binnie, D. M.; Cameron, W.; Dornan, P. J.; Girone, M.; Goodsir, S.; Martin, E. B.; Morawitz, P.; Moutoussi, A.; Nash, J.; Sedgbeer, J. K.; Spagnolo, P.; Stacey, A. M.; Williams, M.; Ghete, V. M.; Girtler, P.; Kühn, D.; Rudolph, G.; Betteridge, A. P.; Bowdery, C. K.; Colrain, P.; Crawford, G.; Finch, A. J.; Foster, F.; Hughes, G.; Jones, R. W. L.; Sloan, T.; Whelan, E. P.; Williams, M.I.; Hoffmann, C.; Jakobs, K.; Kleinknecht, K.; Quast, G.; Renk, B.; Rohne, E.; Sander, H. G.; Gemmeren, P. van; Zeitnitz, C.; Aubert, J.J.; Benchouk, C.; Bonissent, A.; Bujosa, G.; Carr, J.; Coyle, P.; Diaconu, C.; Ealet, A.; Fouchez, D.; Konstantinidis, N.; Leroy, O.; Motsch, F.; Payre, P.; Talby, M.; Sadouki, A.; Thulasidas, M.; Tilquin, A.; Trabelsi, K.; Aleppo, M.; Antonelli, M.; Ragusa, F.; Berlich, R.; Blum, W.; Büscher, V.; Dietl, H.; Ganis, G.; Gotzhein, C.; Kroha, H.; Lütjens, G.; Lütz, G.; Männer, W.; Moser, H. G.; Richter, R.; Rosado-Schlosser, A.; Schael, S.; Settles, R.; Seywerd, H.; Denis, R. St.; Stenzel, H.; Wiedenmann, W.; Wolf, G.; Boucrot, J.; Callot, O.; Chen, S; Cordier, A.; Davier, M.; Duflot, L.; Grivaz, J.-F.; Heusse, P.; Höcker, A.; Jachołkowska, A.; Jacquet, M.; Kim, D.W; Diberder, F. Le; Lefrançois, J.; Lutz, A. M.; Nikolić, Irena; Schune, M. H.; Serin, L.; Simion, S.; Tournefier, E.; Veillet, J. J.; Videau, I.; Zerwas, D.; Azzurri, P.; Bagliesi, G.; Bettarini, S.; Bozzi, C.; Calderini, G.; Ciulli, V.; Dell’Orso, R.; Fantechi, R.; Ferrante, I.; Giassi, A.; Gregorio, A.; Ligabue, F.; Lusiani, A.; Marrocchesi, P. S.; Messineo, A.; Palla, F.; Sanguinetti, G.; Sciabà, A.; Sguazzoni, G.; Steinberger, J.; Тенчини, Р.; Vannini, C.; Venturi, A.; Verdini, P. G.; Blair, G.A.; Bryant, L. M.; Chambers, J.T.; Gao, Y. S.; Green, M.G; Medcalf, T.; Perrodo, P.; Strong, J. A.; Wimmersperg-Toeller, J. H. von; Botterill, D.; Clifft, R. W.; Edgecock, T.R.; Haywood, S. J.; Maley, P.; Norton, P. R.; Thompson, J.C.; Wright, A.E.; Bloch-Devaux, B.; Colas, P.; Fabbro, B.; Kozanecki, W.; Lançon, E.; Lemaire, M. C.; Locci, E.; Pérez, P.; Rander, J.; Renardy, J. F.; Rosowsky, A.; Roussarie, A.; Schuller, J. P.; Schwindling, J.; Trabelsi, A.; Vallage, B.; Black, S.N.; Dann, J.H.; Kim, H.Y; Litke, A. M.; McNeil, M.A.; Taylor, G. N.; Booth, C. N.; Boswell, Rod; Brew, C.; Cartwright, S. L.; Combley, F.; Kelly, M.S.; Lehto, M. H.; Newton, W. M.; Reeve, J.; Thompson, L.F.; Affholderbach, K.; Böhrer, A.; Brandt, Siegmund; Cowan, G.; Foss, J. F.; Grupen, C.; Lutters, G.; Saraiva, Pedro; Smolík, L.; Stephan, F.; Apollonio, M.; Bosisio, L.; Marina, R. Della; Giannini, G.; Gobbo, B.; Musolino, G.; Pütz, J.; Rothberg, J.; Wasserbaech, S.; Williams, R.W.; Armstrong, S.R.; Charles, E.; Elmer, P.; Ferguson, D.P.S.; González, S.; Greening, T.C.; Hayes, O.J.; Hu, H.; Jin, S.; McNamara, P.A.; Nachtman, J. M.; Nielsen, J.; Orejudos, W.; Pan, Y.; Saadi, Y.; Scott, I.; Walsh, J.; Wu, S. L.; Wu, X.; Yamartino, J. M.; Zobernig, G.

doi:10.1016/s0370-2693(97)01266-5

Physics Letters B

1997

DOI: 10.1016/s0370-2693(97)01266-5

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Measurement of the W-pair cross section in e+e− collisions at 172 GeV

R. Barate¹,

D. Buskulic²,

D. Décamp³

et al.

Abstract: The e + e ! W + W cross section is measured in a data sample collected by ALEPH at a mean centre{of{mass energy of 172.09 GeV, corresponding to an integrated luminosity o f 10.65 pb 1 . Cross sections are given for the three topologies, fully leptonic, semi-leptonic and hadronic of a W-pair decay. Under the assumption that no other decay modes are present, the W-pair cross section is measured to be 11:7 1:2(stat:) 0:3(syst:) pb: The existence of the triple gauge boson vertex of the Standard Model is clearly pr… Show more

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Cited by 8 publications

References 23 publications

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

2013

Physics Reports

608

446

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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 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 Γ W , the branching fraction of W decays to hadrons, B(W → had), and the trilinear gauge-boson selfcouplings g

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

2013

Physics Reports

608

446

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Bose-Einstein correlations in W-pair decays

et al. 2000

Self Cite

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Bose-Einstein correlations are studied in semileptonic (WW → qq ν ) and fully hadronic (WW → qqqq ) W-pair decays with the ALEPH detector at LEP at centreof-mass energies of 172, 183 and 189 GeV. They are compared with those made at the Z peak after correction for the different flavour compositions. A Monte Carlo model of Bose-Einstein correlations based on the JETSET hadronization scheme was tuned to the Z data and reproduces the correlations in the WW → qq ν events. The same Monte Carlo reproduces the correlations in the WW → qqqq channel assuming independent fragmentation of the two W's. A variant this model with Bose-Einstein correlations between decay products of different W's is disfavoured.

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Measurement of W-pair production in e+e− collisions at 189 GeV

Barate¹,

Décamp²,

Ghez³

et al. 2000

Physics Letters B

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The production of W + W − pairs is analysed in a data sample collected by ALEPH at a mean centre-of-mass energy of 188.6 GeV, corresponding to an integrated luminosity of 174.2 pb −1 . Cross sections are given for different topologies of W decays into leptons or hadrons. Combining all final states and assuming Standard Model branching fractions, the total W-pair cross section is measured to be 15.71 ± 0.34(stat.) ± 0.18(syst.) pb. Using also the W-pair data samples collected by ALEPH at lower centre-of-mass energies, the decay branching fraction of the W boson into hadrons is measured to be B(W → hadrons) = 66.97 ± 0.65(stat.) ± 0.32(syst.)%, allowing a determination of the CKM matrix element |V cs | = 0.951 ± 0.030(stat.) ± 0.015(syst.).

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Measurement of the W-pair cross section in e+e− collisions at 172 GeV

Cited by 8 publications

References 23 publications

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

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

Bose-Einstein correlations in W-pair decays

Measurement of W-pair production in e+e− collisions at 189 GeV

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