Measurement of the cross section for isolated-photon plus jet production in $pp$ collisions at $\sqrt s=13$ TeV using the ATLAS detector - INSPIRE

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Measurement of the cross section for isolated-photon plus jet production in $pp$ collisions at $\sqrt s=13$ TeV using the ATLAS detector

ATLAS

Collaboration

Dec 30, 2017

25 pages

Published in:

Phys.Lett.B 780 (2018) 578-602

Published: May 10, 2018

e-Print:

1801.00112 [hep-ex]

DOI:

10.1016/j.physletb.2018.03.035

Report number:

CERN-EP-2017-265

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (Elsevier)

The dynamics of isolated-photon production in association with a jet in proton–proton collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset with an integrated luminosity of 3.2 fb −1 . Photons are required to have transverse energies above 125 GeV. Jets are identified using the anti- kt algorithm with radius parameter R=0.4 and required to have transverse momenta above 100 GeV. Measurements of isolated-photon plus jet cross sections are presented as functions of the leading-photon transverse energy, the leading-jet transverse momentum, the azimuthal angular separation between the photon and the jet, the photon–jet invariant mass and the scattering angle in the photon–jet centre-of-mass system. Tree-level plus parton-shower predictions from Sherpa and Pythia as well as next-to-leading-order QCD predictions from Jetphox and Sherpa are compared to the measurements.

Note:

40 pages in total, author list starting page 24, 5 figures, 1 table, published in Physics Letters B, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-01/

p p: scattering
p p: colliding beams
jet: hadroproduction
higher-order: 1
jet: transverse momentum
photon: transverse energy
photon: associated production
ATLAS
quantum chromodynamics: perturbation theory
tree approximation

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