Measurement of charged-particle event shape variables in inclusive √(s)=7 TeV proton-proton interactions with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

The measurement of charged-particle event shape variables is presented in inclusive inelastic pp collisions at a center-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The observables studied are the transverse thrust, thrust minor, and transverse sphericity, each defined using the final-state charged particles' momentum components perpendicular to the beam direction. Events with at least six charged particles are selected by a minimum-bias trigger. In addition to the differential distributions, the evolution of each event shape variable as a function of the leading charged-particle transverse momentum, charged-particle multiplicity, and summed transverse momentum is presented. Predictions from several Monte Carlo models show significant deviations from data.

Original languageEnglish
Article number032004
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume88
Issue number3
DOIs
StatePublished - 6 Aug 2013

Funding

FundersFunder number
Seventh Framework Programme261323
Science and Technology Facilities CouncilPP/E002757/1, ST/F007337/1, ST/I003142/1, PP/E000347/1, ST/H001069/2, ST/K501840/1, ST/H001042/1, ST/H001042/2, ST/K001361/1, ST/L001004/1, ST/I003517/1, GRIDPP, ST/K003437/1, ST/L00352X/1, ST/K001337/1, ST/L001144/1, ST/K00073X/1, ST/J005568/1, ST/K000659/1, ST/K001248/1, ST/I005811/1, ST/M000761/1, ST/J005460/1, ST/M001431/1, ST/H001093/2, ST/K001418/1, ST/K00140X/1, ST/M001474/1, ST/H001093/1, ST/I003525/1, ST/M001512/1, ST/J004804/1, ST/K00137X/1, PP/E003699/2, PP/E003699/1
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung144493
European Commission246806
National Science Foundation1119200

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