Measurement of the WZ -> lvll cross section and limits on anomalous triple gauge couplings in ppbar collisions at root s=1.96 TeV

0367662 - FZÚ 2013 RIV NL eng J - Journal Article
Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš … Total 445 authors
Measurement of the WZ -> lvll cross section and limits on anomalous triple gauge couplings in ppbar collisions at root s=1.96 TeV.
Physics Letters. B. Roč. 695, 1-4 (2011), s. 67-73. ISSN 0370-2693. E-ISSN 1873-2445
R&D Projects: GA MŠMT LA08047
Institutional research plan: CEZ:AV0Z10100502
Keywords : diboson production * W and Z bosons * cross section * anomalous triple gauge couplings * Tevatron * D0
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 3.955, year: 2011

We present a new measurement of the WZ -> lvll (l = e, mu) cross section and limits on anomalous triple gauge couplings. Using 4.1 fb(-1) of integrated luminosity of p (p) over bar collisions at root s = 1.96 TeV, we observe 34 WZ candidate events with an estimated background of 6.0 +/- 0.4 events. We measure the WZ production cross section to be 3.89(-0.90)(+1.07) pb, in good agreement with the standard model prediction. We find no evidence for anomalous WWZ couplings and set 95% C.L. limits on the coupling parameters, -0.077 < lambda(z) < 0.093 and -0.029 < Delta kappa(z) < 0.080 in the HISZ parameterization for a Lambda = 2 TeV form factor scale. These are the best limits to date obtained from the direct measurement of the WWZ vertex.
Permanent Link: http://hdl.handle.net/11104/0202255