6533b862fe1ef96bd12c6a2b

RESEARCH PRODUCT

Measurement of the W(+/-)Z production cross section and limits on anomalous triple gauge couplings in proton-proton collisions at root s=7 TeV with the ATLAS detector

Atlas CollaborationVasiliki MitsouJuan A. Fuster VerdúAntonio Ferrer SoriaMaría Victoria Castillo GiménezSusana Cabrera UrbánCarmen García GarcíaEmilio Higón RodríguezSalvador Martí GarcíaEduardo Ros MartínezSantiago González De La HozJosé Salt CairolsJuan Antonio Valls FerrerMohammed KaciLuca FioriniYesenia Hernández JiménezCarlos Lacasta LlácerMiguel Villaplana Pérez

subject

Col·lisions (Física nuclear)Acceleradors de partículesHigh Energy Physics::ExperimentAstrophysics::Cosmology and Extragalactic AstrophysicsNuclear ExperimentPartícules (Física nuclear)

description

This Letter presents a measurement of W(+/-)Z production in 1.02 fb(-1) of pp collision data at root s = 7 TeV collected by the ATLAS experiment in 2011. Doubly leptonic decay events are selected with electrons, muons and missing transverse momentum in the final state. In total 71 candidates are observed, with a background expectation of 12.1 +/- 1.4(stat.)(-2.0)(+4.1)(syst.) events. The total cross section for W(+/-)Z production for Z/gamma* masses within the range 66 GeV to 116 GeV is determined to be sigma(tot)(WZ) = 20.5(-2.8)(+3.1)(stat.)(-1.3)(+1.4)(syst)(-0.8)(+0.9)(lumi.) pb, which is consistent with the Standard Model expectation of 17.3(0.8)(+1.3) pb. Limits on anomalous triple gauge boson couplings are extracted.

yearjournalcountryeditionlanguage
2012-01-01
10.1016/j.physletb.2012.02.053http://dx.doi.org/10.1016/j.physletb.2012.02.053