A search for resonances with the ATLAS detector in 2.05 fb−1 of proton-proton collisions at

A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb −1 , which was recorded in 2011 at a prot...

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Published in:The European physical journal. C, Particles and fields Particles and fields, 2012, Vol.72 (7), p.2083-2083
Main Authors: Abbott, B., Aharrouche, M., Allwood-Spiers, S. E., Aoun, S., Banfi, D., Benchekroun, D., Blocker, C., Brendlinger, K., Bromberg, C., Caforio, D., Camacho Toro, R., Carvalho, J., Cavalli, D., Ceradini, F., Citterio, M., Costanzo, D., Cuenca Almenar, C., Davidson, N., De Nooij, L., Dindar Yagci, K., Djobava, T., Doan, T. K. O., Düren, M., Elmsheuser, J., Errede, S., Franchino, S., Franz, S., Gadfort, T., Goeringer, C., Gozpinar, S., Greenshaw, T., Guida, A., Gul, U., Guo, J., Hanke, P., Hartert, J., Harvey, A., Hasegawa, S., Havranek, M., Hayakawa, T., Higón-Rodriguez, E., Hristova, I., Huston, J., Huth, J., Jaekel, M. R., Jarlskog, G., Jha, M. K., Ju, X., Juste Rozas, A., Kaplon, J., Kazarinov, M. Y., Knecht, N. S., Komar, A. A., Lankford, A. J., LeCompte, T., Leonhardt, K., Levinson, L. J., Leyko, A. M., Leyton, M., Liu, J. B., Lopez Mateos, D., Lowe, A. J., Malecki, P., McCubbin, N. A., Meoni, E., Mora Herrera, C., Morris, J. D., Navarro, G., Neal, H. A., Neves, R. M., Niedercorn, F., Ohm, C. C., Orlov, I., Petrolo, E., Petschull, D., Piegaia, R., Pohl, M., Pope, B. G., Purohit, M., Rousseau, D., Sadykov, R., Sarkisyan-Grinbaum, E., Savu, D. O., Schwindling, J., Sekhniaidze, G., Shabalina, E., Simonyan, M., Starovoitov, P., Strandberg, J., Suzuki, Y., Trincaz-Duvoid, S., Tsarouchas, C., van Gemmeren, P., Vincter, M. G., Vossebeld, J. H., Watson, A. T., Wijeratne, P. A., Wooden, G., Yao, L., Zwalinski, L.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysics and Cosmology
Bosons
Data search
Elementary Particles
Gluons
Hadrons
Heavy Ions
Large Hadron Collider
Luminosity
Measurement Science and Instrumentation
Nuclear Energy
Nuclear Physics
Particle collisions
Physics
Physics and Astronomy
Protons
Quantum Field Theories
Quantum Field Theory
Quarks
Regular Article - Experimental Physics
String Theory
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Summary:A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb −1 , which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to for narrow and wide resonances. For narrow Z ′ bosons, the observed 95 % Bayesian credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m Z ′ =500 GeV to m Z ′ =1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z ′ boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m Z ′
ISSN:1434-6044
1434-6052
DOI:10.1140/epjc/s10052-012-2083-1