Photon-jet correlations in $pp$ and $p\bar{p}$ collisions

Abstract

We compare results of the $k_t$-factorization approach and the next-to-leading order collinear-factorization approach for photon-jet correlations in $pp$ and $p\bar{p}$ collisions at RHIC and Tevatron energies. We discuss correlations in the azimuthal angle as well as in the two-dimensional space of transverse momentum of photon and jet. Different unintegrated parton distributions (UPDF) are included in the $k_t$-factorization approach. The results depend on UPDFs used. The standard collinear approach gives cross section comparable to the $k_t$-factorization approach. For correlations of the photon and any jet the NLO contributions dominate at relatively small azimuthal angles as well as for asymmetric transverse momenta. For correlations of the photon with the leading jet (the one having the biggest transverse momentum) the NLO approach gives zero contribution at ${\varphi }_{-}<\pi /2$ which opens a possibility to study higher-order terms and/or UPDFs in this region.

14 pages, 17 figures

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Cited by in corpus (18)

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• High-$E_{\mathrm{T}}$ isolated-photon plus jets production in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• Prompt photon hadroproduction at high energies in off-shell gluon-gluon fusion
• Reconsideration of the inclusive prompt photon production at LHC with kt-factorization
• Prompt photon - jet angular correlations at central rapidities in p+A collisions
• Measurement of the inclusive isolated-photon cross section in $pp$ collisions at $\sqrt{s}=13$ TeV using 36 fb${}^{-1}$ of ATLAS data
• Testing for kt-factorization with inclusive prompt photon production at LHC
• T-odd effects in photon-jet production at the Tevatron
• Measurement of the ratio of cross sections for inclusive isolated-photon production in $pp$ collisions at $\sqrt{s}=13$ and $8$ TeV with the ATLAS detector
• Parton transverse momenta and Drell-Yan dilepton production
• TMD parton showers for associated $\gamma$+jet production in electron-proton collisions at high energies
• TMD parton shower effects in associated $\gamma$ + jet production at LHC
• Measurement of isolated-photon plus two-jet production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Prompt photon production in photoproduction, DIS and hadronic collisions
• Inclusive photon production and photon-jet correlations in hadronic collisions
• Dijet and photon-jet correlations in proton-proton collisions at RHIC