“…This result is found to be in agreement with models that include nuclear gluon shadowing.…”
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“…The associated Z vector boson production cross section in the Standard Model is almost two orders of magnitude smaller than the dominant Higgs boson production cross section from gluon fusion. Proton-proton collision data at a centre-of-mass energy of 8 TeV delivered by the LHC with the ATLAS detector corresponding to an integrated luminosity of 13 fb−1 has been analysed. …”
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“…The processes can also be used to probe the gluon density function of the proton. The ATLAS collaboration has measured the production of 4-jets final states in in 20.3 /fb of data collected at a center-of-mass energy of 8TeV. …”
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“…No excess above the expectation from the standard model is observed, and we set limits on the production cross sections of Z' bosons and RS gluons, for signal models with varying widths. For wider Z' signal models, we eclipse previous exclusion limits, excluding Z' bosons with masses up to 3.3 (3.8) TeV, for Z' widths of 10\% (30\%) of their masses.…”
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“…The jet charge can also be used to tag hadronically decaying gauge bosons and the number of charged particles within a jet provides a powerful means to distinguish gluon-initiated from quark-initiated jets. The ATLAS collaboration has used a selection of di-jet events in 20.3 fb-1 of data collected at a center-of-mass energy of 8 TeV to measure the average charged-particle multiplicity and the transverse-momentum weighted average charge of the hadrons within the jets, separately for the more central and the more forward jet and as a function of the jet transverse momentum. …”
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“…The charmed baryon ΛC is of interest for the characterization of the quark-gluon plasma (QGP) created in Pb-Pb collisions, due to its sensitivity to c-quark thermalization and to the hadronization mechanisms. …”
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“…Limits are set for BSM particles such as topcolor-assisted technicolor Z'_{TC} , Kaluza-Klein(K-K) gluons g_{KK} and K-K excitations of graviton G_{KK} in the Randall-Sundrum model of extra dimensions. …”
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“…The data collected by the ATLAS experiment during the 2015 heavy ion LHC run offers new opportunities to probe properties of the Quark-Gluon Plasma at unprecedented high temperatures and densities. …”
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“…The experimental data collected by the ATLAS experiment during the 2015 heavy ion LHC run offers new opportunities to study properties of Quark-Gluon Plasma at unprecedented high temperatures and densities. …”
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“…Specifically, we consider searches for a W ′ boson decaying to a lepton and a neutrino, a Z ′ boson decaying to a pair of taus, and a heavy particle ( Z ′ boson or Randall Sundrum Kaluza Klein gluon) decaying to a pair of top quarks. The searches are performed by measuring the mass distributions of the final state particles and testing for deviations from the expected Standard Model background. …”
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“…The book also discusses topics on the Quark–Gluon plasma, thermal field theory, perturbative quantum chromodynamics, anomalies and cosmology. …”
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“…The electron now has a scale and is no longer captive in a point. The gluon is no longer essential along with the single virtual photon.…”
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“…By colliding protons and examining particles emitted from the collisions, the Large Hadron Collider aims to study the interactions of quarks and gluons at the highest energies accessible in a controlled experimental way. …”
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“…By exploiting the energy and angular correlation structure within a jet, it is possible to differentiate between jets originating from light-quarks and gluons and jets from hadronically-decaying massive particles. …”
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“…The goal of the experiment is to recreate and study the quark-gluon plasma, which is believed to be the state of the Universe up to a few milliseconds after the Big Bang. …”
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“…The quarks and gluons produced in proton-proton collisions form collimated sprays of particles, known as jets. …”
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“…The ATLAS $W$ and $Z$ boson data exhibit sensitivity to the valence quark distributions and the light quark sea composition, whereas the top-quark pair production data have sensitivity to the gluon distribution. The impact of the top-antitop production data is increased by fitting several distributions simultaneously. …”
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“…Measurements of photon and jet production $p$+Pb collisions are potentially sensitive to novel effects such as gluon saturation, the onset of non-linear QCD, and the energy loss of partons in the nuclear matter. …”
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“…Jets are direct probes of the quark-gluon plasma produced in heavy-ion collisions and studying how they are modified in the heavy-ion collisions compared to the pp collisions provides insight into their interactions with this QCD medium. …”
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“…It implies Monte Carlo and analytic modeling of these quantities in the framework of a quark-gluon string model. The string fusion effects are also supposed to be taken into account by implementing of a lattice (grid) in the impact parameter plane. …”
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