Measurements of integrated and differential cross sections for isolated photon pair production in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector

Abstract

A measurement of the production cross section for two isolated photons in proton-proton collisions at a center-of-mass energy of $\sqrt{s}=8$ TeV is presented. The results are based on an integrated luminosity of 20.2 fb${}^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying $|{\eta }^{\gamma }|<1.37$ or $1.56<|{\eta }^{\gamma }|<2.37$ and transverse energies of respectively $E_{\mathrm{T},1}^{\gamma }>40$ GeV and $E_{\mathrm{T},2}^{\gamma }>30$ GeV for the two leading photons ordered in transverse energy produced in the interaction.The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is $16.8\pm 0.8$ pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.

39 pages in total, author list starting page 23, 5 figures, 2 tables, published version, all figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2015-15/

References in corpus (23)

• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Observation of the diphoton decay of the Higgs boson and measurement of its properties
• Luminosity determination in pp collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector at the LHC
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
• Predictions for diphoton production at the LHC through NNLO in QCD
• Search for resonances in diphoton events at $\sqrt{s}$=13 TeV with the ATLAS detector
• Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
• Optimisation of variables for studying dilepton transverse momentum distributions at hadron colliders
• Search for resonant production of high-mass photon pairs in proton-proton collisions at sqrt(s) = 8 and 13 TeV
• Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at $\sqrt{s}=8$ TeV with ATLAS
• Measurement of differential cross sections for the production of a pair of isolated photons in pp collisions at sqrt(s) = 7 TeV
• Gluon-gluon contributions to the production of continuum diphoton pairs at hadron colliders
• Calculation of prompt diphoton production cross sections at Tevatron and LHC energies
• A Novel Technique for Studying the Z Boson Transverse Momentum Distribution at Hadron Colliders
• A practical guide to event generation for prompt photon production
• All-orders resummation for diphoton production at hadron colliders
• Measurement of the cross section for prompt isolated diphoton production using the full CDF Run II data sample
• Measurement of the ${\varphi }_{\eta }^{\ast }$ distribution of muon pairs with masses between 30 and 500 GeV in 10.4 fb${}^{-1}$ of $p\bar{p}$ collisions

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