Lancaster EPrints

Improved measurement of the triple gauge-boson couplings γWW and ZWW in e+e− collisions

Schael, S. and Bouhova-Thacker, Evelina and Bowdery, Christopher and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Smizanska, Maria (2005) Improved measurement of the triple gauge-boson couplings γWW and ZWW in e+e− collisions. Physics Letters B, 614 (1-2). pp. 7-26. ISSN 0370-2693

Full text not available from this repository.

Abstract

Triple gauge-boson couplings γWW 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 , κγ and λγ are: κγ=0.971±0.055(stat)±0.030(syst), λγ=−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-ρ resonance. No deviations from the Standard Model expectations are observed and the lower limit on the techni-ρ mass is set to 600 GeV/c2 at 95% confidence level.

Item Type: Article
Journal or Publication Title: Physics Letters B
Additional Information: Author list is partial - see original article for full author list.
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 9847
Deposited By: Ms Margaret Calder
Deposited On: 25 Jun 2008 10:20
Refereed?: Yes
Published?: Published
Last Modified: 29 Jul 2013 13:07
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/9847

Actions (login required)

View Item