Measurement of Wγ and Zγ production in proton-proton collisions at TeV with the ATLAS detector

We present studies of W and Z bosons with associated high energy photons produced in pp collisions at TeV. The analysis uses 35 pb −1 of data collected by the ATLAS experiment in 2010. The event selection requires W and Z bosons decaying into high p T leptons (electrons or muons) and a photon with E...

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Veröffentlicht in:	The journal of high energy physics 2011-09, Vol.2011 (9)
Hauptverfasser:	Abbott, B., Aefsky, S., Ahles, F., Akimoto, G., Andrei, V., Anulli, F., Aperio Bella, L., Arnault, C., Baker, S., Baltasar Dos Santos Pedrosa, F., Barreiro, F., Belloni, A., Biscarat, C., Blanchot, G., Bogdanchikov, A., Bona, M., Bouchami, J., Buira-Clark, D., Carter, A. A., Carvalho, J., Cascella, M., Catinaccio, A., Cerqueira, A. S., Cooper-Sarkar, A. M., Degenhardt, J., Del Peso, J., Di Micco, B., Duxfield, R., Ebenstein, W. L., Farilla, A., Fisher, M. J., Flores Castillo, L. R., Fratina, S., Froeschl, R., Ghazlane, H., Giraud, P. F., Haas, A., Handel, C., Heinemann, B., Hillert, S., Huhtinen, M., Jackson, J. N., Jakobsen, S., Johansson, P., Kanno, T., Kataoka, Y., Kazarinov, M. Y., König, A. C., Kwee, R., Lacuesta, V. R., Laforge, B., Lamanna, M., Lee, L., Leney, K. J.C., Lewis, G. H., Machado Miguens, J., Maltezos, S., Martin, B., Martinez, M., Mathes, M., Mellado Garcia, B. R., Merritt, F. S., Meyer, J., Ming, Y., Moorhead, G. F., Nuncio-Quiroz, A.-E., Paige, F., Pylypchenko, Y., Ratoff, P. N., Resende, B., Rizvi, E., Rocha de Lima, J. G., Romero Maltrana, D., Ryabov, Y. F., Ryder, N. C., Scott, W. G., Silverstein, S. B., Spiriti, E., Spousta, M., Sulin, V. V., Tanaka, Y., Tappern, G. P., Tardif, D., Tarem, S., Teixeira Dias Castanheira, M., Trivedi, A., Valkar, S., van Gemmeren, P., Vaniachine, A., Virchaux, M., Vitale, A., Vorobiev, A. P., Vreeswijk, M., Weber, M. S., Will, J. Z., Ye, J., Yu, J., Zhu, H., Zobernig, G.
Format:	Artikel
Sprache:	eng
Schlagworte:	Bosons Classical and Quantum Gravitation Elementary Particles High energy physics Leptons Muons Particle collisions Photons Physics Physics and Astronomy Protons Quantum Field Theories Quantum Field Theory Quantum Physics Relativity Theory String Theory
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Beschreibung
Zusammenfassung:	We present studies of W and Z bosons with associated high energy photons produced in pp collisions at TeV. The analysis uses 35 pb −1 of data collected by the ATLAS experiment in 2010. The event selection requires W and Z bosons decaying into high p T leptons (electrons or muons) and a photon with E T > 15 GeV separated from the lepton(s) by a distance ∆ R ( l , γ ) > 0.7 in η - ϕ space. A total of 95 (97) pp → e ± νγ + X ( pp → μ ± νγ + X ) and 25 (23) pp → e + e − γ + X ( pp → μ + μ − γ + X ) event candidates are selected. The kinematic distributions of the leptons and photons and the production cross sections are measured. The data are found to agree with Standard Model predictions that include next-to-leading-order O ( αα s ) contributions.
ISSN:	1029-8479
DOI:	10.1007/JHEP09(2011)072