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

The collaboration
Phys.Lett.B 780 (2018) 578-602, 2018.

Abstract (data abstract)
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-$k_t$ 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. Information about bin-to-bin correlation of the systematic uncertainties: The following uncertaintes are not correlated bin-to-bin: sysPhotonRES, sysPhotonID, sysEtisoGap, sysPhotonInvertVar, sysEtisoUpperLimit, sysEtisoMC and sysMCStat. The different components of the sysPhotonES and sysJetES uncertainties (only the total uncertainty is given here) are fully correlated bin-to-bin.

• #### Table 1

Data from Figures 3a and 5a

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Measured cross sections for isolated-photon plus jet production as a function of $E_{\rm T}^{\gamma}$.

• #### Table 2

Data from Figures 3b and 5b

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Measured cross sections for isolated-photon plus jet production as a function of $p_{\rm T}^{\rm jet-lead}$.

• #### Table 3

Data from Figures 3c and 5c

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Measured cross sections for isolated-photon plus jet production as a function of $\Delta\phi^{\rm \gamma-jet\ lead}$.

• #### Table 4

Data from Figures 3d and 5d

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Measured cross sections for isolated-photon plus jet production as a function of $m^{\gamma-\rm jet}$.

• #### Table 5

Data from Figures 3e and 5e

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Measured cross sections for isolated-photon plus jet production as a function of $|\cos\theta^{\star}|$.