“…The Heavy Ion Physics program of LHC allowed CMS to study the properties of quark gluon plasma produced in Pb-Pb collisions.…”
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“…In the heavy ion collisions the QCD processes are determining the properties of the Quark-Gluon Plasma which is created in the conditions of the extreme energy density. …”
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“…This super-hot matter, composed of quark and gluons, emits thousands of particles as it expands, cools and converts back into hadrons. …”
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“…Two new measurements of the gluon polarization $\Delta G / G$ are discussed. …”
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“…This super-hot matter, composed of quark and gluons, emits thousands of particles as it expands, cools and converts back into hadrons. …”
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“…These include event-by-event pile-up subtraction algorithms for jets and $E_T^{miss}$, jet substructure, quark-gluon discrimination, and jet tagging tools for the identification of boosted heavy particles. …”
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“…The ability to identify jets containing two b-hadrons, originating from e.g. gluon splitting, is demonstrated. The difference between bottom jet production rates in leading and subleading jets is consistent with the next-to-leading-order predictions.…”
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“…The internal structure of jets produced in proton-proton collisions at 7 TeV centre-of-mass energy provides a direct test of QCD calculations of gluon and quark radiation, as well as having sensitivity to hadronisation and underlying event. …”
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“…The internal structure of jets produced in proton-proton collisions at 7 TeV centre-of-mass energy at the LHC provides a direct test of QCD calculations of gluon and quark radiation, and is sensitive to soft QCD effects, such as hadronisation or underlying event. …”
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“…The searches for the $t\bar{t}$ resonances rely on the narrow width topcolor leptophobic $Z'$ and broad width Kaluza-Klein gluon as bench mark.…”
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“…Measurements of the inclusive prompt isolated photon, photons in association with jets and diphoton cross sections provide a direct probe of short-distance physics, complementary to that from measurements of jets or vector-bosons, and are sensitive to the gluon density of the proton. The results are compared to next-to-leading-order or higher-order QCD calculations.…”
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“…In single top production, a light quark interacts with a gluon to produce the top quark, which decays through the Standard Model mode. …”
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“…Measurements of the inclusive isolated-photon, photon plus jet and diphoton\ndifferential cross sections provide a direct probe of short-distance physics, complemen-\ntary to that from measurements of jets or vector-bosons, and are sensitive to the gluon\ndensity of the proton.…”
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“…The annual lattice symposium brings together a global community of researchers from theoretical particle physics and beyond, who employ numerical and computational methods to study the properties of strongly interacting physical systems, above all Quantum Chromodynamics (QCD), the theory describing the interactions of quarks and gluons. Topics include studies of the spectrum and structure of hadrons, lattice studies of matter under extreme conditions, hadronic contributions to weak decay amplitudes, as well as recent developments in simulation algorithms and computer hardware. …”
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“…ATLAS has also commissioned several new powerful tools for for the analysis and interpretation of hadronic final states at the LHC such as jet substructure, jet mass, quark-gluon discrimination, and jet tagging tools for the identification of boosted heavy particles. …”
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“…The inclusive jet production at different centre-of-mass energies, dijet and trijet production measured by ATLAS are used in an NLO QCD fit and show impact for the gluon and quark densities. Off-resonance Drell Yan production may be used to constrain anti-quark density at high x. …”
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“…ATLAS has also commissioned several new powerful tools for for the analysis and interpretation of hadronic final states at the LHC such as jet substructure, jet mass, quark-gluon discrimination, and jet tagging tools for the identification of boosted heavy particles. …”
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“…An impact parameter and secondary-vertex based charm tagging algorithm, JetFitterCharm, has been developed to distinguish $c$-quark jets from either $b$-quark or light-flavoured ($u$,$d$,$s$-quark or gluon) jets. JetFitterCharm is the first such algorithm used in ATLAS physics searches. …”
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“…Isolated prompt photons provide a direct probe of short-distance physics, complementary to that provided by measurements of jets or vector-bosons and are sensitive to the gluon density of the proton. The inclusive prompt photon cross sections have been measured by the ATLAS collaboration at 7 and 8 TeV pp collision centre-of-mass energies, over a wide range of transverse momenta. …”
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“…Isolated prompt photons provide a direct probe of short-distance physics, complementary to that provided by measurements of jets or vector-bosons and are sensitive to the gluon density of the proton. The inclusive prompt photon cross sections have been measured by the ATLAS collaboration at 7 TeV pp collision centre-of-mass energies, over a wide range of transverse momenta. …”
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