Measurement of the inclusive isolated photon production cross section in pp collisions at $\sqrt{s}$ = 7 TeV

Abstract

The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at a centre-of-momentum energy of $\sqrt{s}=$ 7 TeV. The measurement is performed with the electromagnetic calorimeter EMCal and the central tracking detectors, covering a range of $|\eta |<0.27$ in pseudorapidity and a transverse momentum range of $10<p_{\mathrm{T}}^{\gamma }<$ 60 GeV/$c$. The result extends the $p_{\mathrm{T}}$ coverage of previously published results of the ATLAS and CMS experiments at the same collision energy to smaller $p_{\mathrm{T}}$. The measurement is compared to next-to-leading order perturbative QCD calculations and to the results from the ATLAS and CMS experiments. All measurements and theory predictions are in agreement with each other.

29 pages, 10 captioned figures, 1 tables, authors from page 24, published version, figures at http://alice-publications.web.cern.ch/node/5338

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Cited by in corpus (12)

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• The production of isolated photons in PbPb and pp collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• Measurement of isolated photon-hadron correlations in $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV pp and p-Pb collisions
• Single Photon Production at Hadron Colliders at NNLO QCD with Realistic Photon Isolation
• An energy independent scaling of transverse momentum spectra of direct (prompt) photons from two-body processes in high-energy proton-proton collisions
• Associated production of $J/\psi$ and direct photon in the NRQCD and the ICEM using the high-energy factorization
• Direct-photon production in inelastic and high-multiplicity proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Nuclear modification factor of light neutral-meson spectra up to high transverse momentum in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 8.16 TeV
• Master Integrals for Electroweak corrections to $gg\to \gamma \gamma$ -- Light quark contributions
• Measurement of the inclusive isolated-photon production cross section in pp collisions at $\sqrt{s}$ = 13 TeV
• Measurement of the inclusive isolated-photon production cross section in pp and Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV