“…We analyse a wide variety of quark-dominated processes and observables, and show how the power contributions are specified in lowest order by the behaviour of one-loop Feynman diagrams containing a gluon of small virtual mass. We discuss both collinear safe observables (such as the e+e- total cross section and \tau hadronic width, DIS sum rules, e+e- event shape variables and the Drell-Yan K-factor) and collinear divergent quantities (such as DIS structure functions, e+e- fragmentation functions and the Drell-Yan cross section).…”
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“…Its main goal is the study of the behaviour of matter at high energy densities to search for the transition from the hadronic to the quark-gluon-plasma phase. The ALICE detector is mainly made by a central part, (including the Inner Tracking System, the Time-Projection-Chamber, and a large area particle identification array), which is devoted to the detection of hadronic signals, and a forward part with the muon spectrometer, forward multiplicity detectors and zero-degree calorimeter. …”
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“…It is designed to cover the full richness of hadronic and leptonic signals expected at the LHC allowing to establish and to study the phase transition from hadronic matter to deconfined partonic matter, the quark gluon plasma (QGP). <P>The CMS experiment is optimised for the study of hard processes in high luminosity pp collisions at the LHC. …”
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“…The measured cross section values and event distributions require contributions from resolved processes, which are sensitive to the gluon density in the photon.…”
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“…Das Ziel der Untersuchung von ultra-relativistischen Schwerionenkollisionen ist die Suche nach dem Quark Gluon Plasma (QGP), einem Zustand hochdichter stark wechselwirkender Materie in dem der Einschluss von Quarks und Gluonen in Hadronen aufgehoben ist. …”
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“…The spike-center distributions are obtained to exhibit the structure expected from coherent gluon-jet emission dynamics. This structure is similar in both cases considered, namely for all charged and negatively charged particles, and is also similar to that observed recently for all-charged-particle spikes in hadronic interactions. …”
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“…Dressed Gluon Exponentiation (DGE) is used to calculate the thrust and the heavy-jet mass distributions in e+e- annihilation in the two-jet region. …”
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“…The physics includes signals which probe QGP (Quark-Gluon Plasma), namely the $\phi$, J/$\psi$ and $\psi^\prime$ vector mesons and thermal dimuons, and reference signals, namely the (unseparated) $\rho$ and $\omega$ mesons, and Drell-Yan dimuons. …”
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“…We perform an exact calculation of the characteristic function, corresponding to the C parameter differential cross section for a single off-shell gluon. We then concentrate on the two-jet region, derive the Borel representation of the Sudakov exponent in the large-beta_0 limit and compare the result to that of the thrust T. …”
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“…It will provide nuclear collisions at a center-of- mass energy 30 times higher then the present Relativistic Heavy Ion Collider, opening a new era for this field, in which particle production will be dominated by hard processes, and the energy densities will possibly be high enough to treat the generated quark- gluon plasma as an ideal gas. While RHIC is providing a wealth of interesting data, many physicists are working hard to prepare the experiments which will run at the LHC. …”
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“…We include several effects in our calculation: next-to-leading order initial conditions, evolution and coefficient functions. Soft-gluon effects are resummed at next-to-leading-log accuracy. …”
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“…We calculate the contributions that the KK excitations of the gluons make to the multijet cross sections in proton proton collisions at the LHC energy. …”
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“…Like LHC, the Tripler would access new mass scales primarily through gluon fusion. The Tripler should reach about twice the mass scale attainable with LHC.…”
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“…The characterisation of the Quark-Gluon Plasma produced in ultra-relativistic heavy-ion colli- sions is the main goal of the ALICE experiment at the CERN LHC. …”
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“…Jet quenching is one of the established signatures of the Quark Gluon Plasma, and this phenomenon has been studied extensively in high energy heavy ion experiments over the last decade. …”
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“…The ALICE experiment at the CERN LHC is designed to study the physics of strongly interacting matter, and in particular the properties of the Quark-Gluon Plasma, using proton-proton, proton-nucleus and nucleus-nucleus collisions. …”
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“…The long term plan of ALICE (A Large Ion Collider Experiment) at the CERN Large Hadron Collider (LHC) is a detailed investigation and characterisation of the Quark-Gluon Plasma (QGP). ALICE has devised a comprehensive upgrade strategy to enhance its physics capabilities and to exploit the LHC running conditions after the second long shutdown of the LHC scheduled in 2019-20. …”
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“…There are two prominent experimental signatures of quark–gluon plasma creation in ultra-relativistic heavy-ion collisions: the jet quenching phenomenon and the azimuthal-momentum space-anisotropy of final-state particle emission. …”
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“…Measurements of the charmed-baryon production in small systems are also a fundamental reference for heavy-ion collisions, where an enhancement of the baryon-to-meson ratio could derive from hadronisation via coalescence of charm quarks with the quarks in the Quark$-$Gluon Plasma. In this contribution, recent measurements of charmed meson and baryon production in pp collisions and in p-Pb collisions with the ALICE experiment are presented and compared with theoretical calculations. …”
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“…An upper limit for the momentum of light antiquarks in the nucleus, which results in a small gluon distribution, is presented. (orig.)…”
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