“…These detailed measurements at low- and high-$p_T$ provide new insights into the hydrodynamic picture of the Quark-Gluon Plasma and probe the path-length dependence of partonic energy loss in dense medium. …”
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“…A comparison of the centrality dependence of forward energy flow to that at lower pseudorapidities can shed light on the gluon saturation at low-x. This problem can also be approached by a direct comparison of PbPb and pp energy flow in the forward region. …”
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“…This measurement of nuclear effects in absence of Quark Gluon Plasma formation will provide a clear and unambiguous reference for the study of Hot and Dense Matter (HDM) effects, a reference which is today needed to deduce an unambiguous interpretation of the results already obtained.…”
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“…Topics to discuss contain presumably Higgs boson observed at LHC and Tevatron (including alternative interpretations), exploratory searches for dark matter and dark energy, neutrino oscillations and the problem of neutrino mass, progress in the study of confinement in YM theory and beyond, quark-gluon plasma and other exotic states of matter, black holes (pro et contra), problems in QCD as the strong interaction theory. …”
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“…The three-dimensional nucleon structure is central to many theoretical and experimental activities, and research in this field has seen many advances in the last two decades, addressing fundamental questions such as the orbital motion of quarks and gluons inside the nucleons, their spatial distribution, and the correlation between spin and intrinsic motion. …”
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“…The searches for Z$^\prime$ resonances look for resonant particles that are sufficiently massive to produce highly Lorentz-boosted top quarks, which yield collimated decay products that may be partially or fully merged. 95\% confidence level upper limits up to 2.0 TeV/$c^2$ are set on the product of the production cross section and branching fraction for topcolor Z$^\prime$ modelled for several widths, as well as for Randall--Sundrum Kaluza--Klein gluons, which are excluded to values up to 1.5 TeV/$c^2$.…”
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“…It also provides discriminators against potentially large backgrounds from quarks, gluons and light leptons (electrons and muons). Moreover, thanks to the particle event reconstruction avalaible in CMS, a fast online hadronic tau reconstruction can be performed allowing the development of efficient tau trigger selections which allow to perform a broad range of physics analysis. …”
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“…The hypothesis of the standard model Higgs boson for quantum numbers and couplings is tested against the hypothesis of a narrow spin-2 resonance produced through the gluon fusion mechanism and with minimal couplings to the W$^+$W$^-$ pair.…”
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“…In addition, in quark and gluons collisions it is easy to produce coloured objects like gluinos and squarks, which decay typically to jets and MET, while the cross sections for Electroweak productions are smaller and the mass reach substantially reduced. …”
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“…The specific $J^P=2^+$ hypothesis is excluded with a confidence level above 99.9%, independently of the assumed contributions of gluon fusion and quark-antiquark annihilation processes in the production of the spin-2 particle.…”
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“…In addition, in quark and gluons collisions it is easy to produce coloured objects like gluinos and squarks, which decay typically to jets and MET, while the cross sections for Electroweak productions are smaller and the mass reach substantially reduced. …”
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“…Hence, narrow leptophobic topcolor Z' boson with a mass below 1.8~TeV is excluded and a Kaluza-Klein excitation of the gluon in a Randall-Sundrum model is excluded for masses below 2.0 TeV.…”
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“…An updated search is performed for gluino $R$-hadrons which have come to rest within the ATLAS calorimeter, and decay at some later time to a gluon or $q\bar{q}$ pair and a neutralino. Candidate decay events are triggered in the empty bunch crossings of the LHC in order to remove $pp$ collision backgrounds. …”
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“…At the LHC, the Standard Model Higgs boson is expected to be produced mainly from gluon and vector boson fusion. A secondary process is the Higgs production in association with vector bosons which, despite the lower cross section, provides an additional sensitive channel thanks to the higher background rejection achieved through the additional highly energetic leptons from the W/Z decays. …”
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“…The resulting distributions can be interpreted statistically to form new observables, allowing the separation of boosted, hadronically-decaying particles from light quark and gluon backgrounds. We present a study of Q-jets in boosted, hadronically-decaying $W$ boson and dijet samples, demonstrating the discriminating power of this technique. …”
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“…If the distribution is random – a reasonable assumption for Quark–Gluon Plasma (QGP) – the baryon-to-meson ratio is nearly twice higher than in the situation where quark colours are pre-arranged to obtain a white hadron in the combination of nearest quarks and antiquarks. …”
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“…At the LHC, the Standard Model (SM) Higgs boson is expected to be produced mainly from gluon and vector boson fusion. Higgs production in association with vector bosons ($WH$, $ZH$) is $\sim$ one order of magnitude lower. …”
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“…Evidence for production of the Higgs boson by vector boson fusion is obtained in a model-independent approach by comparing the signal strengths $\mu$ of vector boson fusion and production associated with a vector boson to to that for gluon fusion including associated production of top quark pairs: $\mu_{\rm VBF+VH}/\mu_{\rm ggF+ttH}= 1.4 ^{+0.4}_{-0.3} \rm{(stat.)} ^{+0.6}_{-0.4} \rm{(syst.)}$ which is 3.3 Gaussian standard deviations from zero.…”
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“…The non-Abelian nature of QCD suggests that particles that have a gluon constituent, such as glueballs or hybrids, should exist. …”
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“…--HTML--><p>Quarkonium measurements play a crucial role in the investigation of the properties of the deconfined state of nuclear matter, the Quark-Gluon Plasma (QGP), produced in ultra-relativistic heavy ion collisions. …”
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