Mostrando 15,761 - 15,780 Resultados de 16,682 Para Buscar '"quarks"', tiempo de consulta: 0.85s Limitar resultados
  1. 15761
    por CMS Collaboration
    Publicado 2014
    “…The $4\ell$ analysis uses the ZZ invariant mass distribution as well as a matrix element likelihood discriminant to separate the ZZ components originating from gluon- and quark-initiated processes. The $2\ell 2\nu$ analysis relies on the transverse mass or missing transverse energy distributions in jet categories. …”
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  2. 15762
    por Tricoli, Alessandro
    Publicado 2014
    “…In particular, associated production of W or Z bosons with light-flavour jets is a powerful tool for testing perturbative QCD calculations and Monte Carlo generators, while analogous events with heavy-flavour jets can constrain the quark flavour content of the proton. Furthermore, events with a Z boson produced with two well-separated jets can be used to distinguish electroweak and strong production mechanisms, and constrain signals of physics beyond the Standard Model.…”
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  3. 15763
    por Schoefbeck, Robert
    Publicado 2014
    “…This strategy retains sensitivity for mass configurations where signals of direct production of the lighter top squark are hard to distinguish from the top quark pair production background. For the case of the gluino, a soft lepton analysis improves sensitivity for small mass differences between the gluino and the lightest neutralino. …”
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    Enlace del recurso
  4. 15764
    por Caminal Armadans, Roger
    Publicado 2014
    “…The analysis has been optimized for the stop decaying into a charm quark plus a neutralino SUSY signal and it is carried out in several signal regions differing by the requirements on the $p_T$ of the leading jet and the missing transverse energy. …”
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  5. 15765
    por Astalos, Robert
    Publicado 2014
    “…Bose-Einstein correlations provide a unique opportunity for detailed understanding of the space-time geometry of the hadronization region, for determining the size and shape of the source from which particles are emitted and for interpreting of quark confinement effects. The ATLAS collaboration has performed a measurement of Bose-Einstein correlations of the pairs of charged particles in p-p collisions at 900 GeV and 7 TeV up to very high charged-particle multiplicities.…”
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  6. 15766
    por Chen, Zhenyu
    Publicado 2014
    “…The wide $p_T$ coverage and rich sample of high multiplicity pPb events allow (1) a precise examination of the mass ordering effect of $v_n$ at low $p_T$ as predicted by hydrodynamics for a collectively expanding medium; (2) exploration of possible constituent quark number scaling of $v_2$ and $v_3$ between mesons and baryons as was observed in high-energy nucleus-nucleus collisions.…”
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    Enlace del recurso
  7. 15767
    por The ATLAS collaboration
    Publicado 2015
    “…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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  8. 15768
    por Koch, J, Huberts, P
    Publicado 1989
    “…The subjects covered by the Summer School focussed on two main issues currently under active investigation and which will be pursued with the new facilities: the transition from nucleonic to quark degrees of freedom in the decription of nuclear reactions, and the behavior of nuclear matter as one approaches extreme densities and temperatures. …”
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    Enlace del recurso
  9. 15769
    “…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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    Enlace del recurso
  10. 15770
    por Tu, Zhoudunming
    Publicado 2015
    “…Finally, the possible constituent quark number of scaling of $v_2$ between mesons and baryons may indicate the deconfinement in small systems.…”
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    Enlace del recurso
  11. 15771
    por Guilbaud, Maxime
    Publicado 2016
    “…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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  12. 15772
    por CMS Collaboration
    Publicado 2016
    “…Minor backgrounds from diboson and top-quark processes are estimated from Monte-Carlo simulation. …”
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  13. 15773
    por Trofymov, Artur
    Publicado 2016
    “…In addition, ratios of the cross sections for the production of single Z bosons and top­quark pairs have been derived at various center­of­mass energies. …”
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  14. 15774
    por Soto, Rodrigo
    Publicado 2016
    “…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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    Enlace del recurso
  15. 15775
    por Christakoglou, Panos
    Publicado 2017
    “…--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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  16. 15776
    por Glatzer, Julian
    Publicado 2017
    “…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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  17. 15777
    por Tsiskaridze, Vakhtang
    Publicado 2017
    “…The first analysis is targeting the decay channel where a top squark decays to a bottom quark and a chargino, with subsequent decay of the chargino to a W-boson and a neutralino. …”
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  18. 15778
    por CMS Collaboration
    Publicado 2017
    “…A search for the standard model Higgs boson produced with high transverse momentum decaying to a bottom quark-antiquark pair has been performed using a data set of pp collisions at $\sqrt{s}=13~\mathrm{TeV}$ collected with the CMS experiment at the LHC. …”
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  19. 15779
    por Vernieri, Caterina
    Publicado 2017
    “…--HTML--><p>An inclusive search for the standard model Higgs boson produced with high transverse momentum decaying to a bottom-antibottom quark pair has been performed using a data set of pp collisions at √s = 13 TeV collected with the CMS experiment at LHC. …”
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  20. 15780
    por Trombetta, Giuseppe
    Publicado 2017
    “…The study of quarkonia in heavy-ion collisions has been the subject of intense experimental and theoretical effort, ever since their production was predicted to be sensitive to the formation of a deconfined state of strongly-interacting matter, known as the Quark-Gluon Plasma (QGP). In p-Pb collisions, Cold Nuclear Matter (CNM) effects, such as nuclear shadowing or partonic energy loss, are expected to influence quarkonium production. …”
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