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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

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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, others
A 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 D

ISSN

2470-0010

Publisher

American Physical Society

Issue

9

Volume

98

Page range

1-31

Article number

a092004

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-09-18

First Open Access (FOA) Date

2019-09-18

First Compliant Deposit (FCD) Date

2019-09-02

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