High-$E_{\mathrm{T}}$ isolated-photon plus jets production in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector

Abstract

The dynamics of isolated-photon plus one-, two- and three-jet production in $pp$ collisions at a centre-of-mass energy of 8 TeV are studied with the ATLAS detector at the LHC using a data set with an integrated luminosity of 20.2 fb${}^{-1}$. Measurements of isolated-photon plus jets cross sections are presented as functions of the photon and jet transverse momenta. The cross sections as functions of the azimuthal angle between the photon and the jets, the azimuthal angle between the jets, the photon-jet invariant mass and the scattering angle in the photon-jet centre-of-mass system are presented. The pattern of QCD radiation around the photon and the leading jet is investigated by measuring jet production in an annular region centred on each object; enhancements are observed around the leading jet with respect to the photon in the directions towards the beams. The experimental measurements are compared to several different theoretical calculations, and overall a good description of the data is found.

59 pages in total, author list starting page 43, 16 figures, 5 tables, submitted to Nuclear Physics B, All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2015-11/

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Cited by in corpus (16)

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• Measurement of differential cross sections for inclusive isolated-photon and photon+jet production in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Measurement of prompt photon production in $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV $p$+Pb collisions with ATLAS
• Comparison of inclusive and photon-tagged jet suppression in 5.02 TeV Pb+Pb collisions with ATLAS
• Measurement of differential cross sections of isolated-photon plus heavy-flavour jet production in pp collisions at $\sqrt{s}=8$ TeV using the ATLAS detector
• Search for new phenomena in high-mass final states with a photon and a jet from $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Vector Bosons and Jets in Proton Collisions
• Probing the in-medium $P_T$-broadening by $\gamma$+HF angular de-correlations
• TMD parton shower effects in associated $\gamma$ + jet production at LHC
• $Z^0$ boson associated b-jet production in high-energy nuclear collisions
• Measurement of isolated-photon plus two-jet production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Nonperturbative transverse-momentum-dependent effects in dihadron and direct photon-hadron angular correlations in $p+p$ collisions at $\sqrt{s}=200$ GeV
• Comparison of fragmentation functions for light-quark- and gluon-dominated jets from $pp$ and Pb+Pb collisions in ATLAS
• Probing cold nuclear matter effects with the productions of isolated-$\gamma$ and $\gamma$+jet in p$+$Pb collisions at $\sqrt{s_{NN}}=$ 8.16 TeV
• Production of electroweak bosons in association with jets with the ATLAS detector