Mitsou, Vasiliki
Fuster Verdú, Juan A.
Ferrer Soria, Antonio
Castillo Giménez, María Victoria
Cabrera Urbán, Susana
García García, Carmen
Higón Rodríguez, Emilio
Martí García, Salvador
Ros Martínez, Eduardo
González de la Hoz, Santiago
Salt Cairols, José
Valls Ferrer, Juan Antonio
Kaci, Mohammed
Fiorini, Luca
Hernández Jiménez, Yesenia
Lacasta Llácer, Carlos
A study of W(+/-)Z production in proton-proton collisions at root s = 7 TeV is presented using data corresponding to an integrated luminosity of 4.6 fb(-1) collected with the ATLAS detector at the Large Hadron Collider in 2011. In total, 317 candidates, with a background expectation of 68 +/- 10 events, are observed in double-leptonic decay final states with electrons, muons and missing transverse momentum. The total cross-section is determined to be sigma(tot)(WZ) = 19.0(-1.3)(+1.4)(stat.) +/- 0.9(syst.) +/- 0.4(lumi.) pb, consistent with the Standard Model expectation of 17.6(-1.0)(+1.1) pb. Limits on anomalous triple gauge boson couplings are derived using the transverse momentum spectrum of Z bosons in the selected events. The cross-section is also presented as a function of Z boson transverse momentum and diboson invariant mass.
