Mostrando 15,341 - 15,360 Resultados de 16,682 Para Buscar '"quarks"', tiempo de consulta: 0.33s Limitar resultados
  1. 15341
    por Zerwas, Peter M, Siemann, Peter
    Publicado 2002
    “…Moreover, high-precision studies of the top-quark and the gauge boson sector will be discussed. …”
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  2. 15342
    “…We demonstrate explicitly that, in the heavy-quark limit and at one-loop order in perturbation theory, the amplitude does factorize, i.e. that it can be written as a convolution of a perturbatively calculable hard-scattering amplitude with the (non-perturbative) light-cone distribution amplitude of the B-meson. …”
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  3. 15343
    por Riccati, L, Masera, M
    Publicado 2003
    “…The main goal of the experiment is to observe and study the phase transition from hadronic matter to deconfined partonic matter (quark gluon plasma - QGP). ALICE is conceived as a general purpose detector and will address most of the phenomena related to the QGP formation at LHC energies: to this purpose, a large fraction of the hadrons, leptons and photons produced in each interaction will be measured and identified. (18 refs).…”
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    Enlace del recurso
  4. 15344
    por CERN. Geneva. ALEPH
    Publicado 2002
    “…A search for a scalar top quark decaying into a stable gluino has been performed using 207 pb$^{-1}$ data collected by the ALEPH detector at center-of-mass energies between 204 and 209 GeV. …”
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  5. 15345
    por Roda, C
    Publicado 2002
    “…The analysis is based on the three most sensitive topologies in this mass region: direct production of Higgs followed by the decay $H \rightarrow \gamma \gamma $ and associated production of Higgs with either a W boson or a top quark pair, followed by the decay $H \rightarrow b\bar b$. …”
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  6. 15346
    por Collective
    Publicado 2006
    “…This is followed by reviews of specific areas of standard model physics: precision electroweak analysis by James Wells, quantum chromodynamics and jets by George Sterman, and heavy quark effective field by Matthias Neubert. Developments in neutrino physics are discussed by André de Gouvea and the theory behind the Higgs boson is addressed by Laura Reina. …”
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    Enlace del recurso
  7. 15347
    “…From azimuthal distributions of protons and pi sup - mesons the out-of-plane (squeeze-out) flow effects have been observed and the parameter a sub 2 (the measure of the anisotropic emission strength) has been extracted. The Quark-Gluon String Model reproduces quite well the experimental results…”
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  8. 15348
    por Ellis, Jonathan Richard
    Publicado 2004
    “…QCD works, new NNLO calculations are becoming available and new string calculational tools are emerging, but no conclusions can yet be drawn about the discovery of the quark-gluon plasma or pentaquarks. The small upward shift in the experimental value of m_t raises somewhat the central value of the Higgs mass extracted from a global electroweak fit, and the CKM model describes well the data from the B factories. …”
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    Enlace del recurso
  9. 15349
    por Petrushanko, Sergey V
    Publicado 2005
    “…The CMS capability for detecting high-mass mu+ mu- pairs from semileptonic B Bbar decays and secondary J/psi’s from single B decays (useful channels for studying medium-induced bottom-quark energy loss) is also discussed.…”
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    Enlace del recurso
  10. 15350
    por Legger, F, Bay, A, Haefeli, G, Locatelli, L
    Publicado 2004
    “…LHCb is one of the four experiments currently under construction at LHC (Large Hadron Collider) at CERN, and its aim is the study of b-quark physics. LHCb trigger strategy is based on three levels, and will reduce the event rate from 40 MHz to a few hundred Hz. …”
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    Enlace del recurso
  11. 15351
    “…The NA60 experiment was designed to identify signatures of a new state of matter, the Quark Gluon Plasma, in heavy-ion collisions at the CERN Super Proton Synchroton. …”
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  12. 15352
    “…Decay branching ratios in principle enable the quark masses to be determined. (62 refs).…”
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    Enlace del recurso
  13. 15353
    por Likhoded, A K, Shlyapnikov, P
    Publicado 1978
    “…The experimental situation regarding the yields of resonances is analyzed in the light of the quark-parton picture. (129 refs).…”
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  14. 15354
    “…The quark-parton model as applied to deep-inelastic lepton-hadron scattering is used as a laboratory model for the study of ideas encountered in strong interaction physics. …”
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  15. 15355
    por Salur, S
    Publicado 2005
    “…In this case canonical suppression can not be simply parameterized with the geometrical overlap volume but will depend on the individual quark content of each particle. This theory is tested by comparing the data from different collision systems and centralities.…”
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  16. 15356
    por Colla, A
    Publicado 2005
    “…The use of dileptonic probes in the search for quark-gluon plasma formation has been carried on by several experiments at the CERN SPS, which have provided some of the most interesting observations; nevertheless certain important questions remain open. …”
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  17. 15357
    por Kroner, Friedrich
    Publicado 1980
    “…The models which are taken for the comparison are the dual topological unitarization, the recombination model with structure functions of the Kuti-Weisskopf model, and the spectator quark counting-rules. A statement in the sense that one model is in better agreement with the data than another is possible for the case of outgoing K--mesons. …”
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  18. 15358
    por Marchisone, Massimiliano
    Publicado 2014
    “…Under these extreme conditions a deconfined partonic state, called Quark-Gluon Plasma (QGP), is formed. The measurement of quarkonia (charmonia and bottomonia) is expected to provide essential in- formation about the QGP properties. …”
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    Enlace del recurso
  19. 15359
    por De Gruttola, D
    Publicado 2014
    “…The main physics goal of ALICE (A Large Ion Collider Experiment) is the study of the physics of strongly interacting matter at extreme energy densities, where the formation of a new phase of matter, the Quark-GluonPlasma (QGP), is expected. One of the most important aspect of ALICE is the Particle IDentification (PID) performed by combining different identification techniques. …”
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  20. 15360
    por Doshita, Norihiro
    Publicado 2016
    “…The availability of pion beam provides an access to the Drell-Yan physics throughout the process where quark(target)-antiquark(beam) pair annihilates electromagnetically with a production of dilepton pair. …”
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    Enlace del recurso
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