6533b837fe1ef96bd12a2542
RESEARCH PRODUCT
Measurement of event shapes at large momentum transfer with the ATLAS detector in pp collisions at root s=7 TeV
Atlas CollaborationJuan A. Fuster VerdúAntonio Ferrer SoriaSusana Cabrera UrbánCarmen García GarcíaMaría Victoria Castillo GiménezEmilio Higón RodríguezSalvador Martí GarcíaEduardo Ros MartínezSantiago González De La HozJosé Salt CairolsJuan Antonio Valls FerrerMohammed KaciYesenia Hernández JiménezCarlos Lacasta LlácerLuca FioriniVasiliki Mitsousubject
Astrophysics::High Energy Astrophysical PhenomenaHigh Energy Physics::ExperimentFísica nucleardescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-01-01 |