Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions

6533b86dfe1ef96bd12c9117

RESEARCH PRODUCT

Improved measurement of the triple gauge-boson couplings gamma WW and ZWW in e(+)e(-) collisions

Schael S Barate R Brunelie Re R De Bonis I Decamp D Goy C Ze Je Quel S Lees J.Martin F Merle E Minard M.Pietrzyk B B Trocme Bravo S Casado Mp Chmeissani M Crespo Jm Fernandez E Fernandez Bosman M Garrido L Martinez M Pacheco A Ruiz H Colaleo A Creanza D De Filippis N De Palma M Iaselli G Maggi G Maggi M Nuzzo S Ranieri A 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 Barklow T Buchmu Ller O Cattaneo M Clerbaux B Drevermann H Forty Rw Frank M Gianotti F Hansen Jb Harvey J Hutchcroft De Janot P Jost B Kado M Mato P Moutoussi A Ranjard F Rolandi L Schlatter D Teubert F Valassi A Videau I Badaud F Dessagne S Falvard A Fayolle D Gay P Jousset J Michel B Monteil S Pallin D Pascolo Jm Perret P Hansen Jd Hansen Jr Hansen Ph Kraan Ac Nilsson Bs Kyriakis A Markou C Simopoulou E Vayaki A Zachariadou K Blondel A Brient J.Machefert F A Rouge Videau H Ciulli V Focardi E Parrini G Antonelli A Antonelli M Bencivenni G Bossi F Capon G Cerutti F Chiarella V Laurelli P Mannocchi G Murtas Gp Passalacqua L Kennedy J Lynch Jg Negus P O'shea V Thompson As Wasserbaech S Cavanaugh R Dhamotharan S Geweniger C Hanke P Hepp V Kluge Ee Putzer A Stenzel H Tittel K Wunsch M Beuselinck R Cameron W Davies G Dornan Pj Girone M Marinelli N Nowell J Rutherford Sa Sedgbeer Jk Thompson Jc White R Ghete Vm Girtler P Kneringer E Kuhn D Rudolph G Bouhova Thacker E Bowdery Ck Clarke Dp Ellis G Finch Aj Foster F Hughes G Jones Rwl Pearson Mr Robertson Na Smizanska M Van Der Aa O Delaere C Leibenguth G Lemaitre V Blumenschein U Ho Lldorfer F Jakobs K Kayser F Mu Ller A.Renk B Sander H.Schmeling S Wachsmuth H Zeitnitz C Ziegler T Bonissent A Coyle P Curtil C Ealet A Fouchez D Payre P Tilquin A Ragusa F David A Dietl H.Giuseppe Raso

subject

description

Triple gauge-boson couplings ?WW and ZWW involving single-photon, single-W and W-pair production are determined using data samples collected at LEP with the ALEPH detector at centre-of-mass energies between 183 and 209 GeV. The integrated luminosity used is 700 pb-1 for the single-photon measurement and 683 pb-1 for the W channels. Restricting the measurement to C- and P-conserving terms and applying local SU(2) L×U(1)Y gauge invariance, the measured values of the parameters g1 Z, ?? and ?? are: g1 Z=1.001±0. 027(stat)±0.013(syst), ??=0.971±0.055(stat) ±0.030(syst), ??=-0.012±0.027(stat) ±0.011(syst) for single-parameter fits, where the two other parameters are fixed to their Standard Model values. Results are also presented for the cases where two or all three couplings are allowed to vary. An additional analysis using W-pair events is performed to measure the unconstrained real and imaginary parts of all 14 triple gauge-boson couplings and to perform an indirect search for a techni-? resonance. No deviations from the Standard Model expectations are observed and the lower limit on the techni-? mass is set to 600 GeV/c2 at 95% confidence level. © 2005 Elsevier B.V. All rights reserved.

year	journal	country	edition	language
2005-01-01

10.1016/j.physletb.2005.03.058 http://hdl.handle.net/10447/18441