Measurement of event shapes at large momentum transfer with the ATLAS detector in pp collisions at

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2012-11, Vol.72 (11), p.2211
• Main Authors: Abbott, B., Aharrouche, M., Allwood-Spiers, S. E., Aoun, S., Banfi, D., Benchekroun, D., Binet, S., 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., Favareto, A., 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., Holy, T., 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., Kuhl, T., 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., Piegaia, R., Pohl, M., Santonico, R., Schaarschmidt, J., Scott, W. G., Seiden, A., Spiwoks, R., Stelzer, H. J., Stoerig, K., Tarem, S., Thomson, E., Tsipolitis, G., Unno, Y., Valentinetti, S., Vickey Boeriu, O. E., Vreeswijk, M., Wang, S. M., Wasicki, C., Watkins, P. M., Wiglesworth, C., Young, C. J., Zhao, Z.
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Collisions (Nuclear physics); Detectors; Elementary Particles; Hadrons; Heavy Ions; Large Hadron Collider; Luminosity; Mathematical analysis; Measurement Science and Instrumentation; Momentum transfer; Nuclear Energy; Nuclear Physics; Particle accelerators; Particle collisions; Partons; Physics; Physics and Astronomy; Protons; Quantum Field Theories; Quantum Field Theory; Regular Article - Experimental Physics; Shape; Shape recognition; String Theory
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-012-2211-y

A measurement of event shape variables is presented for large momentum transfer proton-proton collisions using the ATLAS detector at the Large Hadron Collider. Six event shape variables calculated using hadronic jets are studied in inclusive multi-jet events in 35 pb −1 of integrated luminosity at a center-of-mass energy of . These measurements are compared to predictions by three Monte Carlo event generators containing leading-logarithmic parton showers matched to leading order matrix elements for 2→2 and 2→ n ( n =2,…,6) scattering. Measurements of the third-jet resolution parameter, aplanarity, thrust, sphericity, and transverse sphericity are generally well described. The mean value of each event shape variable is evaluated as a function of the average momentum of the two leading jets p T,1 and p T,2 , with a mean p T approaching 1 TeV.