Measurement of event shapes at large momentum transfer with the ATLAS detector in pp collisions at root s=7 TeV

Journal article

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 √s=7 TeV. 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 pT,1 and pT,2, with a mean pT approaching 1 TeV. © 2012 CERN for the benefit of the ATLAS collaboration.

Authors: Aad, G; Abbott, B; Abdallah, J; Khalek, SA; Abdelalim, A

• Publication status: Published
• Journal: EUROPEAN PHYSICAL JOURNAL C
• Volume: 72
• Issue: 11
• Pages: 1-22
• Publication date: 2012-11-01
• DOI: 10.1140/epjc/s10052-012-2211-y
• EISSN: 1434-6052
• ISSN: 1434-6044