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Measurement of dijet azimuthal decorrelations in pp collisions at vs=8?TeV with the ATLAS detector and determination of the strong coupling
journal contribution
posted on 2023-06-09, 18:52 authored by N L Abraham, Benedict AllbrookeBenedict Allbrooke, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, Samuel Jones, Antonella De SantoAntonella De Santo, Fabrizio SalvatoreFabrizio Salvatore, Kate ShawKate Shaw, K Suruliz, Mark SuttonMark Sutton, Fabio Tresoldi, Fabrizio Trovato, Iacopo Vivarelli, E Winkels, The ATLAS Collaboration, othersA measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations is presented, using the quantity R??. The quantity R?? specifies the fraction of the inclusive dijet events in which the azimuthal opening angle of the two jets with the highest transverse momenta is less than a given value of the parameter ??max. The quantity R?? is measured in proton-proton collisions at vs=8?TeV as a function of the dijet rapidity interval, the event total scalar transverse momentum, and ??max. The measurement uses an event sample corresponding to an integrated luminosity of 20.2?fb-1 collected with the ATLAS detector at the CERN Large Hadron Collider. Predictions of a perturbative QCD calculation at next-to-leading order in the strong coupling with corrections for nonperturbative effects are compared to the data. The theoretical predictions describe the data in the whole kinematic region. The data are used to determine the strong coupling aS and to study its running for momentum transfers from 260 GeV to above 1.6 TeV. Analysis that combines data at all momentum transfers results in aS(mZ)=0.1127+0.0063-0.0027.
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review DISSN
2470-0010Publisher
American Physical SocietyExternal DOI
Issue
9Volume
98Page range
1-31Article number
a092004Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-09-18First Open Access (FOA) Date
2019-09-18First Compliant Deposit (FCD) Date
2019-09-02Usage metrics
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