Počet záznamů: 1

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

  1. 1.
    0367662 - FZU-D 2013 RIV NL eng J - Článek v odborném periodiku
    Abazov, V. M. - Abbott, B. - Abolins, M. - Kupčo, Alexander - Lokajíček, Miloš
    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
    Grant CEP: GA MŠk LA08047
    Výzkumný záměr: CEZ:AV0Z10100502
    Klíčová slova: diboson production * W and Z bosons * cross section * anomalous triple gauge couplings * Tevatron * D0
    Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
    Impakt faktor: 3.955, rok: 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.
    Trvalý link: http://hdl.handle.net/11104/0202255