“…The suppression of J/psi and other charmonium states was predicted as one of the first signatures of the Quark Gluon Plasma (QGP) formation and was seen at RHIC and SPS. …”
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“…This book shows how the study of multi-hadron production phenomena in the years after the founding of CERN culminated in Hagedorn's pioneering idea of limiting temperature, leading on to the discovery of the quark-gluon plasma - announced, in February 2000 at CERN. …”
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“…The fragmentation differences between jets initiated by a quark and jets initiated by a gluon lead to a flavour dependence in the jet energy scale. …”
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“…The original ideas of Mott for such a transition in solids have been adapted to describe a broad variety of phenomena in condensed matter physics (solids, liquids, and fluids), in plasma and cluster physics, as well as in nuclear physics (nuclear matter and quark-gluon systems). The book gives a comprehensive overview of theoretical methods and experimental results of the current research on the Mott effect for this wide spectrum of topics. …”
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“…The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of one class of momentum-weighted sums, called the jet charge, in dijet events using 20.3 fb$^{-1}$ of data recorded with the ATLAS detector at $\sqrt{s}=8$ TeV in $pp$ collisions at the LHC. …”
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“…In the mass range above $180$ GeV, assuming the theoretical constraint on the $q\bar q$ production cross section calculated with perturbative next-to-next-to leading order (NNLO) QCD and next-to-leading order (NLO) Electroweak corrections, the signal strength of the gluon-fusion component with respect to the leading order (LO) prediction is determined to be $\mu_{gg}=2.4 \pm 1.0 ({\rm stat.}) …”
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“…Model independent upper limits on cross section times branching fraction for the neutral Higgs boson production of via gluon fusion and in association with bottom quarks are also given.…”
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“…This poster presents a search for single top-quark production via flavour-changing neutral current processes from gluon plus up- or charm-quark initial states in proton-proton collisions at the LHC. …”
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“…It is predicted that a new state of matter, the so called Quark Gluon Plasma (QGP) forms at the high temperature and energy density reached in these collisions. …”
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“…The heavy resonance produced via gluon-fusion or $b$-associated production is assumed to decay to a $\tau^+ \tau^-$ pair with at least one $\tau$ lepton decaying hadronically. …”
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“…However, it can also be interpreted in terms of initial state effects arising from gluon saturation. The pseudorapidity dependence of the azimuthal Fourier coefficients ($v_n$) is expected to be sensitive to the underlying mechanism with, in the hydrodynamic picture, the longer lifetime of the fireball on the Pb-going side expected to lead to a larger flow signal than found on the p-going side. …”
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“…The new results presented here provide new insights into the longitudinal dynamics of relativistic heavy ion collisions, and help improve the three-dimensional modeling of the evolution of the strongly-coupled quark gluon medium.…”
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“…The data are used to determine 95% confidence level upper limits on the product of production cross sections and branching fractions, σ(pp → A)·BR(A → Zh)·BR(h → bb), in the range of [4.0,0.017] pb ([6.9, 0.026] pb) for m A = [220, 2000] GeV assuming exclusively gluon-fusion (b-quark- associated) production. Results are also interpreted in the context of benchmark models for a two-Higgs doublet extension of the Standard Model.…”
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“…The production of jets, photons and of gauge bosons in association with jets at hadron colliders provides a stringent test of perturbative QCD and can be used to probe the gluon density function of the proton. We present recent measurements of the inclusive jet cross section in data collected at center­of­mass energies of 8 TeV and 13 TeV. …”
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“…Besides these systems that are studied in detail, concepts are applied to some modern examples including the quark–gluon plasma, the motion of bacterial suspensions, the electronic properties of graphene or the dynamics of a vortex gas, among others. …”
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“…The aim of relativistic heavy-ion collisions is to investigate the properties of the Quark-Gluon Plasma (QGP) phase, that is achieved at high-enough temperatures and/or densities. …”
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“…The production of jets, photons and of gauge bosons in association with jets at hadron colliders provides a stringent test of perturbative QCD and can be used to probe the gluon density function of the proton. In this letter we present recent measurements of the inclusive jet cross section in data collected at center-of-mass energies of 8 TeV and 13 TeV. …”
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“…--HTML--><p>Anisotropic flow studies play a crucial role in the characterization of the nature of the quark gluon plasma (QGP) created in collisions of heavy ions at ultra-relativistic energies. …”
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“…The current measurement can be used for stronger constraints to the poorly known gluon distribution inside the proton at large longitudinal parton momentum fraction, while it paves the way for the very first observation of this elementary particle in nucleus-nucleus collisions.…”
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“…Final states with two hadronic tau-lepton decays requiring either the presence or absence of b-jets are considered and the selection is optimised for Higgs bosons in b-quark associated and gluon-fusion production. No statistically significant excess over the expected background is observed and exclusion limits at the 95% confidence level are derived in combination with the h/A/H -> mu mu, h/A/H -> tau_e tau_mu and h/A/H -> tau_lep tau_had decay channels. …”
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