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Measurement of event shapes at large momentum transfer with the ATLAS detector in pp collisions at root s=7 TeV
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
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Number of Authors: 2863
2012 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 72, no 11, 2211- p.Article in journal (Refereed) Published
Abstract [en]

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 root 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.

Place, publisher, year, edition, pages
2012. Vol. 72, no 11, 2211- p.
Keyword [en]
Deep-Inelastic Scattering, Parton Distributions, Hera, Annihilation, Nucleus, Physics, Model, Lhc, Qcd
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-118057DOI: 10.1140/epjc/s10052-012-2211-yISI: 000312074800015Scopus ID: 2-s2.0-84871238559OAI: oai:DiVA.org:kth-118057DiVA: diva2:604422
Funder
Swedish Research Council
Note

QC 20130211. Author count: 2863

Available from: 2013-02-11 Created: 2013-02-11 Last updated: 2017-12-06Bibliographically approved

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Strandberg, Jonas

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