Measurement of W boson polarisations and CP-violating triple gauge couplings from W+W- production at LEP

Authors
Abbiendi, G Ackerstaff, K Ainsley, C Akesson, PF Alexander, G Allison, J Anderson, KJ Arcelli, S Asai, S Ashby, SF Axen, D Azuelos, G Bailey, I Ball, AH Barberio, E Barlow, RJ Baumann, S Behnke, T Bell, KW Bella, G Bellerive, A Benelli, G Bentvelsen, S Bethke, S Biebel, O Bloodworth, IJ Boeriu, O Bock, P Bohme, J Bonacorsi, D Boutemeur, M Braibant, S Bright-Thomas, P Brigliadori, L Brown, RM Burckhart, HJ Cammin, J Capiluppi, P Carnegie, RK Carter, AA Carter, JR Chang, CY Charlton, DG Clarke, PEL Clay, E Cohen, I Cooke, OC Couchman, J Couyoumtzelis, C Coxe, RL Csilling, A Cuffiani, M Dado, S Dallavalle, GM Dallison, S de Roeck, A de Wolf, E Dervan, P Desch, K Dienes, B Dixit, MS Donkers, M Dubbert, J Duchovni, E Duckeck, G Duerdoth, IP Estabrooks, PG Etzion, E Fabbri, F Fanti, N Feld, L Ferrari, P Fiedler, F Fleck, I Ford, M Frey, A Furtjes, A Futyan, DI Gagnon, P Gary, JW Gaycken, G Geich-Gimbel, C Giacomelli, G Giacomelli, P Glenzinski, D Goldberg, J Grandi, C Graham, K Gross, E Grunhaus, J Gruwe, M Gunther, PO Hajdu, C Hanson, GG Hansroul, M Hapke, M Harder, K Harel, A Harin-Dirac, M Hauke, A Hauschild, M Hawkes, CM Hawkings, R Hemingway, RJ Hensel, C Herten, G Heuer, RD Hill, JC Hocker, A Hoffman, K Homer, RJ Honma, AK Horvath, D Hossain, KR Howard, R Huntemeyer, P Igo-Kemenes, P Ishii, K Jacob, FR Jawahery, A Jeremie, H Jones, CR Jovanovic, P Junk, TR Kanaya, N Kanzaki, J Karapetian, G Karlen, D Kartvelishvili, V Kawagoe, K Kawamoto, T Keeler, RK Kellogg, RG Kennedy, BW Kim, DH Klein, K Klier, A Kluth, S Kobayashi, T Kobel, M Kokott, TP Komaniya, S Kowalewski, RV Kress, T Krieger, P von Krogh, J Kuhl, T Kupper, M Kyberd, P Levinson, L Liebisch, R Lillich, J List, B Littlewood, C Lloyd, AW Lloyd, SL Loebinger, FK Long, GD Losty, MJ Lu, J Ludwig, J Macchiolo, A Macpherson, A Mader, W Marcellini, S Marchant, TE Martin, AJ Martin, JP Martinez, G Mashimo, T Mattig, P McDonald, WJ McKenna, J McMahon, TJ McPherson, RA Meijers, F Mendez-Lorenzo, P Menges, W Merritt, FS Mes, H Michelini, A Mihara, S Mikenberg, G Miller, DJ Mohr, W Montanari, A Mori, T Nagai, K Nakamura, I Neal, HA Nisius, R O'Neale, SW Oakham, FG Odorici, F Ogren, HO Oh, A Okpara, A Oreglia, MJ Orito, S Pasztor, G Pater, JR Patrick, GN Patt, J Pfeifenschneider, P Pilcher, JE Pinfold, J Plane, DE Poli, B Polok, J Pooth, O Przybycien, M Quadt, A Rembser, C Renkel, P Rick, H Rodning, N Roney, JM Rosati, S Roscoe, K Rossi, AM Rozen, Y Runge, K Runolfssou, O Rust, DR Sachs, K Saeki, T Sahr, O Sarkisyan, EKG Sbarra, C Schaile, AD Schaile, O Scharff-Hansen, P Schroder, M Schumacher, T Schwick, C Scott, WG Seuster, R Shears, TG Shen, BC Shepherd-Themistocleous, CH Sherwood, P Siroli, GP Skuja, A Smith, AM Snow, GA Sobie, R Soldner-Rembold, S Spagnolo, S Sproston, M Stahl, A Stephens, K Stoll, K Strom, D Strohmer, R Stumpf, L Surrow, B Talbot, SD Tarem, S Taylor, RJ Teuscher, R Thiergen, M Thomas, J Thomson, MA Torrence, E Towers, S Toya, D Trefzger, T Trigger, I Trocsanyi, Z Tsur, E Turner-Watson, MF Ueda, I Vachon, B Vannerem, P Verzocchi, M Voss, H Vossebeld, J Waller, D Ward, CP Ward, DR Watkins, PM Watson, AT Watson, NK Wells, PS Wengler, T Wermes, N Wetterling, D White, JS Wilson, GW Wilson, JA Wyatt, TR Yamashita, S Zacek, V Zer-Zion, D
Citation
G. Abbiendi et al., Measurement of W boson polarisations and CP-violating triple gauge couplings from W+W- production at LEP, EUR PHY J C, 19(2), 2001, pp. 229-240
Citations number
41
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
EUROPEAN PHYSICAL JOURNAL C
ISSN journal
1434-6044 → ACNP
Volume
19
Issue
2
Year of publication
2001
Pages
229 - 240
Database
ISI
SICI code
1434-6044(200102)19:2<229:MOWBPA>2.0.ZU;2-6
Abstract
Measurements are presented of the polarisation of W+W- boson pairs produced in e(+)e(-) collisions. and of CP-violating WWZ and WW gamma trilinear gau ge couplings. The data were recorded by the OPAL experiment at LEP during 1 998. where a total integrated luminosity of 183 pb(-1) was obtained at a ce ntre-of-mass energy of 189 GeV. The measurements are performed through a sp in density matrix analysis of the W boson decay products. The fraction of W bosons produced with longitudinal polarisation was found to be sigma (L)/s igma (total) = (21.0 +/- 3.3 +/- 1.6)% where the first error is statistical and the second systematic. The joint W boson pair production fractions wer e found to be sigma (TT)/sigma (total) = (78.1 +/- 9.0 +/- 3.2)%, sigma (LL )/sigma (total) = (20.1 +/- 7.2 +/- 1.8)% and sigma (LL)/sigma (total) = (1 .8 +/- 14.7 +/- 3.8)%. In the CP-violating trilinear gauge coupling sector we find <(<kappa>)over tilde> = -0.02 (+0.10)(-0.07), g(4)(z) = -0.02(-0.33 )(+0.32) and <(<lambda>)over tilde>(z) = -0.18(-0.16)(+0.24), where errors include both statistical and systematic uncertainties. In each case the cou pling is determined with all other couplings set to their Standard model va lues except those related to the measured coupling via SU(2)(L) x U(1)(Y) s ymmetry. These results are consistent with Standard Model expectations.