Measurement of the production cross section of three isolated photons in $pp$ collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector
Copyright policy )Measurement of the production cross section of three isolated photons in $pp$ collisions at $\sqrt{s}$ = 8 TeV using the ATLAS detector
A measurement of the production of three isolated photons in proton–proton collisions at a centre-of-mass energy $\sqrt{s}$ = 8 TeV is reported. The results are based on an integrated luminosity of 20.2 fb$^{−1}$ collected with the ATLAS detector at the LHC. The differential cross sections are measured as functions of the transverse energy of each photon, the difference in azimuthal angle and in pseudorapidity between pairs of photons, the invariant mass of pairs of photons, and the invariant mass of the triphoton system. A measurement of the inclusive fiducial cross section is also reported. Next-to-leading-order perturbative QCD predictions are compared to the cross-section measurements. The predictions underestimate the measurement of the inclusive fiducial cross section and the differential measurements at low photon transverse energies and invariant masses. They provide adequate descriptions of the measurements at high values of the photon transverse energies, invariant mass of pairs of photons, and invariant mass of the triphoton system.
Physics letters / B 781, 55 - 76 (2018). doi:10.1016/j.physletb.2018.03.057
Published by North-Holland Publ., Amsterdam
- Northwestern State University United States
- Deutsches Elektronen-Synchrotron DESY Germany
- UNIVERSITE PARIS DESCARTES France
- University of Birmingham United Kingdom
- University of Pisa Italy
mass spectrum: (2photon), mass spectrum: (3photon), measured [channel cross section], transverse energy [photon], Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, rapidity dependence, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Settore ING-INF/07 - Misure Elettriche e Elettroniche, scattering [p p], photon: isolated production, photon: transverse energy, 8000 GeV-cms, (3photon) [mass spectrum], Physics, ddc:530, Settore FIS/01 - Fisica Sperimentale, Particle physics, perturbation theory: higher-order, higher-order: 1, ATLAS, Parton distributions; hierarchy; quark; LHC, mass dependence, Settore FIS/01 - FISICA SPERIMENTALE, CERN LHC Coll, PARTON DISTRIBUTIONS; HIERARCHY; QUARK; LHC, colliding beams [p p], channel cross section: measured, Particle Physics - Experiment, 1 [higher-order], perturbation theory [quantum chromodynamics], Nuclear and High Energy Physics, (2photon) [mass spectrum], p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], multiple production [photon], QC1-999, FOS: Physical sciences, 530, info:eu-repo/classification/ddc/500.2, energy dependence, isolated production [photon], differential cross section: measured, measured [differential cross section], High energy physics, quantum chromodynamics: perturbation theory, two-photon [mass spectrum], hep-ex, 500, photon: multiple production, higher-order [perturbation theory], p p: colliding beams, mass spectrum: two-photon, experimental results, ddc: ddc:500.2, ddc: ddc:530
mass spectrum: (2photon), mass spectrum: (3photon), measured [channel cross section], transverse energy [photon], Settore FIS/04 - Fisica Nucleare e Subnucleare, High Energy Physics - Experiment, rapidity dependence, High Energy Physics - Experiment (hep-ex), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Settore ING-INF/07 - Misure Elettriche e Elettroniche, scattering [p p], photon: isolated production, photon: transverse energy, 8000 GeV-cms, (3photon) [mass spectrum], Physics, ddc:530, Settore FIS/01 - Fisica Sperimentale, Particle physics, perturbation theory: higher-order, higher-order: 1, ATLAS, Parton distributions; hierarchy; quark; LHC, mass dependence, Settore FIS/01 - FISICA SPERIMENTALE, CERN LHC Coll, PARTON DISTRIBUTIONS; HIERARCHY; QUARK; LHC, colliding beams [p p], channel cross section: measured, Particle Physics - Experiment, 1 [higher-order], perturbation theory [quantum chromodynamics], Nuclear and High Energy Physics, (2photon) [mass spectrum], p p: scattering, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex], multiple production [photon], QC1-999, FOS: Physical sciences, 530, info:eu-repo/classification/ddc/500.2, energy dependence, isolated production [photon], differential cross section: measured, measured [differential cross section], High energy physics, quantum chromodynamics: perturbation theory, two-photon [mass spectrum], hep-ex, 500, photon: multiple production, higher-order [perturbation theory], p p: colliding beams, mass spectrum: two-photon, experimental results, ddc: ddc:500.2, ddc: ddc:530
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