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

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Article number2211
<mark>Journal publication date</mark>11/2012
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number11
Volume72
Number of pages22
Publication StatusPublished
<mark>Original language</mark>English

Abstract

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 p T,1 and p T,2, with a mean p T approaching 1 TeV.

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This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.