Collaboration, ATLAS
(2018)
Measurement of dijet azimuthal decorrelations in $pp$ collisions at
$\sqrt{s}=8$ TeV with the ATLAS detector and determination of the strong
coupling.
Phys. Rev. D, 98.
092004-.
![]() |
Text
1805.04691v1.pdf - Submitted version Download (674kB) |
Abstract
A measurement of the rapidity and transverse momentum dependence of dijet azimuthal decorrelations is presented, using the quantity $R_{\Delta \phi}$. The quantity $R_{\Delta \phi}$ 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 $\Delta \phi_\mathrm{max}$. The quantity $R_{\Delta \phi}$ is measured in proton--proton collisions at $\sqrt{s}=$8 TeV as a function of the dijet rapidity interval, the event total scalar transverse momentum, and $\Delta \phi_\mathrm{max}$. 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 non-perturbative 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 $\alpha_{\mathrm{S}}$ and to study its running for momentum transfers from 260 GeV to above 1.6 TeV. An analysis that combines data at all momentum transfers results in $\alpha_{\mathrm{S}}(m_{Z}) = 0.1127^{+0.0063}_{-0.0027}$.
Item Type: | Article |
---|---|
Additional Information: | 46 pages in total, author list starting page 30, 4 figures, 11 tables, submitted to Phys. Rev. D.. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2012-19 |
Uncontrolled Keywords: | hep-ex, hep-ex |
Depositing User: | Symplectic Admin |
Date Deposited: | 10 Sep 2018 15:17 |
Last Modified: | 19 Jan 2023 01:18 |
DOI: | 10.1103/PhysRevD.97.092004 |
Open Access URL: | https://journals.aps.org/prd/pdf/10.1103/PhysRevD.... |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3026062 |