학술논문
Measurement of W(+/-)Z production in proton-proton collisions at root s=7 TeV with the ATLAS detector
Document Type
Author
Åsman, Barbro; Bendtz, Katarina; Bohm, Christian; Clément, Christophe; Eriksson, Daniel; Gellerstedt, Karl; Hellman, Sten; Holmgren, Sven-Olof; Johansen, Marianne; Johansson, K. Erik; Jon-And, Kerstin; Khandanyan, Hovhannes; Kim, Hyeon Jin; Klimek, Pawel; Lundberg, Johan; Lundberg, Olle; Milstead, David A.; Moa, Torbjörn; Papadelis, Aras; Sellden, Björn; Silverstein, Samuel B.; Sjölin, Jörgen; Strandberg, Sara; Tylmad, Maja; Yang, Zhaoyu
Source
European Physical Journal C. 72(10):2173
Subject
Language
English
ISSN
1434-6044
1434-6052
1434-6052
Abstract
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.