Mostrando 14,901 - 14,920 Resultados de 16,682 Para Buscar '"quarks"', tiempo de consulta: 0.30s Limitar resultados
  1. 14901
    por CMS Collaboration
    Publicado 2013
    “…To enhance the sensitivity to neutral MSSM Higgs bosons, the search includes the case where the Higgs boson is produced in association with a b-quark jet. No excess is observed in the tau-pair invariant-mass spectrum. …”
    Enlace del recurso
  2. 14902
    por Hejbal, J
    Publicado 2013
    “…Measurements of vectors bosons in association with heavy flavor, such as W+c and W+b production, have unique sensitivity to the heavy quark density of the proton. Differential cross sections are presented and compared to QCD predictions at NLO and NNLO.…”
    Enlace del recurso
  3. 14903
    por CMS Collaboration
    Publicado 2014
    “…We set 95\% confidence-level upper limits on the production cross section for heavy resonances decaying to top quark-antiquark pairs in the mass range of 1~TeV -- 3~TeV. …”
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  4. 14904
    Publicado 2014
    “…Ten years ago a workshop on particle correlations and femtoscopy was convened to establish a regular series of workshops, initially following the Quark Matter conferences, where a critical and thorough analysis of latest results on Bose-Einstein/HBT correlations and other femtoscopic methods will be possible. …”
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  5. 14905
    por Fischer, W, Jowett, J M
    Publicado 2015
    “…High-energy ion colliders are large research tools in nuclear physics to study the Quark-Gluon-Plasma (QGP). The range of collision energy and high luminosity are important design and operational considerations. …”
    Enlace del recurso
    Enlace del recurso
  6. 14906
    por Marchisone, Massimiliano
    Publicado 2015
    “…According to the color-screening model, these mesons give important information about the deconfined medium called Quark-Gluon Plasma (QGP) produced in ultrarelativistic heavy-ion collisions. …”
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  7. 14907
    por Seifert, Frank
    Publicado 2015
    “…The measurement of the Higgs Boson and its cross-section in top associated production allows a direct measurement of the top quark Yukawa coupling at tree level. This can be compared with the indirect one in gluon-gluon-fusion production. …”
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  8. 14908
    por Cairo, Valentina Maria
    Publicado 2015
    “…The effects of space-­time geometry in the hadronization phase has been studied in the context of Bose­-Einstein correlations between charged particles, for determining the size and shape of the source from which particles are emitted and for interpreting of quark confinement effects. Bose­-Einstein correlation parameters are investigated in p­p collisions at 900 GeV and 7 TeV, up to very high charged­-particle multiplicities.…”
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  9. 14909
    por Kulchitsky, Yuri
    Publicado 2015
    “…The effects of space-time geometry in the hadronization phase has been studied in the context of Bose-Einstein correlations between charged particles, for determining the size and shape of the source from which particles are emitted and for interpreting of quark confinement effects. Bose-Einstein correlation parameters are investigated in p-p collisions at 900 GeV and 7 TeV, up to very high charged-particle multiplicities. …”
    Enlace del recurso
  10. 14910
    por CMS Collaboration
    Publicado 2016
    “…A search for the standard model Higgs boson produced in association with a top quark pair is presented. Data collected by the CMS experiment in $\mathrm{pp}$ collisions at a center of mass energy of $\sqrt{s}=13~\mathrm{TeV}$ and corresponding to an integrated luminosity of 2.3~fb$^{-1}$ are used. …”
    Enlace del recurso
  11. 14911
    por Stefkova, Slavomira
    Publicado 2016
    “…Precise measurements of the quark coupling strength, $|V_{ub}|$, the least well known CKM element, allow a strong test of the unitarity of the CKM matrix. …”
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  12. 14912
    por Beauchemin, Pierre-Hugues
    Publicado 2016
    “…The jet charge can also be used to tag hadronically decaying gauge bosons and the number of charged particles within a jet provides a powerful means to distinguish gluon-initiated from quark-initiated jets. The ATLAS collaboration has used a selection of di-jet events in 20.3 /fb of data collected at a center-of-mass energy of 8TeV to measure the average charged-particle multiplicity and the transverse-momentum weighted average charge of the hadrons within the jets, separately for the more central and the more forward jet and as a function of the jet transverse momentum. …”
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  13. 14913
    por Malde, Sneha Sirirshkumar
    Publicado 2016
    “…Within the Standard Model the CKM matrix, which describes the quark couplings, is expected to be unitary. By making precise measurements of the CKM matrix parameters new physics models can be constrained, or with sufficient precision the effects of physics beyond the standard model might become apparent. …”
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  14. 14914
    por Mallik, Samirnath, Sarkar, Sourav
    Publicado 2016
    “…These developments are then applied to find quark condensate and hadron parameters in medium, including dilepton production. …”
    Enlace del recurso
    Enlace del recurso
  15. 14915
    por Kane, Gordon
    Publicado 2017
    “…The text provides a pedagogical description of the theory, and incorporates the recent Higgs boson and top quark discoveries. With its clear and engaging style, this new edition retains its essential simplicity. …”
    Enlace del recurso
  16. 14916
    por CMS Collaboration
    Publicado 2017
    “…The study of the anomalous interactions of the recently discovered Higgs boson is performed using the decay information $\mathrm{H}\to 4\ell$ and information from associated production of two quark jets, originating either from vector boson fusion or associated vector boson. …”
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  17. 14917
    por Biesuz, Nicolo Vladi
    Publicado 2017
    “…Final states with different number of leptons or photons and where in many cases at least one Higgs decays into a b-quark pair are studied using different jet reconstruction techniques which are complementary in their acceptance for low and high mass transverse momentum. …”
    Enlace del recurso
  18. 14918
    por Ramos Martinez, Alberto
    Publicado 2017
    “…This result in the<br /> three-flavor effective theory is used to obtain an accurate value of<br /> the strong coupling by means of (high order) perturbative relations<br /> between the effective theory couplings at the charm and beauty quark<br /> ``thresholds''.<br /> <br /> All in all, our strategy allows us to obtain an accurate determination<br /> of the strong coupling at the electroweak scale with sub-percent<br /> precision.…”
    Enlace del recurso
  19. 14919
    por Gasnikova, Ksenia
    Publicado 2017
    “…Z cross sections are also measured at a center-of-mass energies of 8TeV and 13TeV, and cross-section ratios to the top-quark pair production have been derived. This ratio measurement leads to a cancellation of several systematic effects and allows therefore for a high precision comparison to the theory predictions.…”
    Enlace del recurso
  20. 14920
    por Dordei, Francesca
    Publicado 2017
    “…In these proceedings, precision measurements are presented of several observables related to the so-called unitary triangles, that arise from the unitarity requirements on the 3x3 Cabibbo-Kobayashi-Maskawa matrix describing the quark mixing. Moreover, recent measurements of $C\!…”
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