BE2: W-boson pair production in the di-leptonic channel
In the production of W boson pairs a coupling appears between a Z boson and the two W bosons or between a photon and the W bosons, which is called triple gauge coupling (TGC). The most general theoretical structure of this coupling comprises 14 different parameters, which are all fixed by the standard model. This offers the possibility for precision tests of the standard model. This analysis investigates the pair production of W bosons [1] where the W bosons are identified by their decays in lepton, specifically muons. The measurement of the production rate (cross section) allows already for constraining the size of anomalous couplings in the TGC vertex [2]. Further constraints come from the investigation of the angular distribution of the leptons. In addition the W pair production with a leptonic decay of one of the two W bosons constitues a background to the search for the Higgs boson and for new physics phenomena like supersymmetric particles. Hence, a precise knowledge of the W pair production rate is mandatory for these searches.
References:
In the production of W boson pairs a coupling appears between a Z boson and the two W bosons or between a photon and the W bosons, which is called triple gauge coupling (TGC). The most general theoretical structure of this coupling comprises 14 different parameters, which are all fixed by the standard model. This offers the possibility for precision tests of the standard model. This analysis investigates the pair production of W bosons [1] where the W bosons are identified by their decays in lepton, specifically muons. The measurement of the production rate (cross section) allows already for constraining the size of anomalous couplings in the TGC vertex [2]. Further constraints come from the investigation of the angular distribution of the leptons. In addition the W pair production with a leptonic decay of one of the two W bosons constitues a background to the search for the Higgs boson and for new physics phenomena like supersymmetric particles. Hence, a precise knowledge of the W pair production rate is mandatory for these searches.
References:
- V.M. Abazov et al. [DØ Collaboration],
Measurement of the WW production cross section in p pbar collisions at √s = 1.96 TeV,
Phys. Rev. Lett. 94 (2005) 151801.
hep-ex/0410066. - V.M. Abazov et al. [DØ Collaboration],
Limits on anomalous trilinear gauge couplings from W W → e+ e-, W W → e± μ-+ and W W → μ+ μ- events from p pbar collisions at √s = 1.96 TeV,
Phys.Rev. D74 (2006) 057101, [Erratum-ibid.D74 (2006) 059904]
hep-ex/0608011.
