Materias dentro de su búsqueda.
Mostrando 15,201 - 15,220 Resultados de 16,682 Para Buscar '"quarks"', tiempo de consulta: 0.28s Limitar resultados
  1. 15201
    por The ATLAS collaboration
    Publicado 2011
    “…Cross section is extracted from the fit of the discriminant distribution to data with systematic uncertainties included into the fit. For a top quark mass of 172.5 GeV, the measured cross section yields σ(t¯t) = 179.0 +9.8−9.7 (stat+syst) ± 6.6(lumi) pb in agreement with approximate NNLO perturbative QCD calculations.…”
    Enlace del recurso
    Measurement of the ttbar production cross-section in pp collisions at sqrt{s} = 7 TeV using kinematic information of lepton+jets events
  2. 15202
    por Sandstroem, A R
    Publicado 2011
    “…Single muons also provide access to heavy flavor production, which is expected to behave differently to the light quark sector at high transverse momentum. This talk describes measurements performed using up to 9 µb-1 of lead-lead collision data provided at a nucleon-nucleon center-of-mass energy of 2.76 GeV by the Large Hadron Collider and collected by the ATLAS Detector during November and December 2010.…”
    Enlace del recurso
    Measurement of quarkonia,heavy flavor & vector bosons in ATLAS
  3. 15203
    por Buckingham, RM, Issever, C
    Publicado 2011
    “…Improved limits are set on the product of cross section and acceptance for excited-quark (q∗) and axigluon production as a function of q∗ and axigluon mass. …”
    Enlace del recurso
    Searches for new particles decaying into jet pairs in ATLAS data
  4. 15204
    “…We search for such a resonance using the final state where both W bosons from the top quark decay into either an electron and electron-neutrino or a muon and muon-neutrino (dilepton final state). …”
    Enlace del recurso
    A Search for ttbar Resonances in the Dilepton Channel in 1.04/fb of pp Collisions at sqrt(s) = 7 TeV
  5. 15205
    por Prasad, Srivas
    Publicado 2011
    “…The major backgrounds come from W → τν, Z → μμ where a muon is lost, and from QCD, particularly from heavy-flavor quark decays. Cross sections and kinematic distributions are compared with Standard Model expectations using next-to-leading-order QCD calculations and several PDF sets.…”
    Enlace del recurso
    Measurement of the Cross Section of W Bosons Produced in pp Collisions at sqrt{s} = 7 TeV With the ATLAS Detector
  6. 15206
    por Bousson, N
    Publicado 2011
    “…Two robust b-tagging algorithms, JetProb and SV0, taking advantage of the impact parameter of tracks or reconstructing secondary vertices have been swiftly commissioned and used for several analyses of the 2010 data: bottom and top quark production cross-section measurements, searches for supersymmetry and new physics, etc. …”
    Enlace del recurso
    Commissioning of high-performance b-tagging algorithms in pp collisions at sqrt(s)=7 TeV with the ATLAS experiment
  7. 15207
    por Ricaud, Hélène
    Publicado 2011
    “…The ALICE experiment at LHC is dedicated to investigate the transition of matter from the hadron gaz to the Quark and Gluons Plasma in which partons are deconfined. …”
    Enlace del recurso
    Etude de la production de baryons et mésons étranges dans les collisions proton-proton avec l’expérience ALICE auprès du LHC
  8. 15208
    por CMS Collaboration
    Publicado 2012
    “…This preliminary study provides a test of the standard model prediction and gives further insight into the dynamics of heavy quark production in association with vector bosons.…”
    Enlace del recurso
    Measurement of B hadron angular correlations in association to a Z boson
  9. 15209
    por CMS Collaboration
    Publicado 2012
    “…These represent the first detailed measurements, in heavy-ion collision, of the b-quark energy loss kinematic dependence.…”
    Enlace del recurso
    J/psi results from CMS in PbPb collisions, with 150mub-1 data
  10. 15210
    por Dorigo, Tommaso
    Publicado 2012
    “…Searches for the rare decays B_d -> mu mu and B_s -> mu mu have allowed to set limits on the branching fractions which are close to standard model predictions, strongly constraining new physics models. The top quark has been studied with great detail, obtaining among other results the world's best measurement of its mass as m(top) = 173.49 +- 0.43(stat. + JES) +- 0.98(syst.) …”
    Enlace del recurso
    Recent CMS Results
  11. 15211
    por CMS Collaboration
    Publicado 2012
    “…We derive exclusion limits in a variety of supersymmetry topologies with $R$-parity violation and in a model that has an exotic quark.…”
    Enlace del recurso
    Search for RPV supersymmetry with three or more leptons and b-tags
  12. 15212
    por Pesaro, G
    Publicado 2009
    “…These results, which are currently used as input for global fits, can be interpreted as cancellation between u and d quark contribution in the deuteron. The first results for the Collins and Sivers asymmetries for charged hadrons from the 2007 proton COMPASS data are also presented and discussed.…”
    Enlace del recurso
    Enlace del recurso
    Transverse spin effects at COMPASS
  13. 15213
    por Savin, Igor A
    Publicado 2010
    “…The asymmetries are parameterised taking into account possible contributions from different nucleon parton distribution functions and parton fragmentation functions depending on the transverse or longitudinal components of the quark spin. They can be modulated with sin ($\phi$), sin (2$\phi$), sin (3$\phi$) and cos ($\phi$). …”
    Enlace del recurso
    Azimuthal asymmetries in production of charged hadrons by high energy muons scattered off polarised deuterons at COMPASS
  14. 15214
    por CMS Collaboration
    Publicado 2013
    “…This note describes the combination of %recent measurements of the W-boson polarization in top-quark decays performed by the ATLAS and CMS Collaborations. …”
    Enlace del recurso
    LHC Combination note: W helicities
  15. 15215
    por Floris, Michele
    Publicado 2013
    “…--HTML-->The ultimate goal of Heavy-Ion collisions is the study of the properties of the deconfined and chirally restored medium known as the Quark-Gluon Plasma. With the advent of the Large Hadron Collider (LHC) a new energy regime was reached. …”
    Enlace del recurso
    Light-flavour hadron production in Pb-Pb collisions at the LHC measured by the ALICE experiment
  16. 15216
    “…It very likely exist for neutrons in a neutron star and, possibly, in a conjectured quark state at their center. Even the Universe itself can be regarded as being in a kind of superfluid state. …”
    Enlace del recurso
    Enlace del recurso
    Enlace del recurso
    Novel superfluids
  17. 15217
    por Siegert, F
    Publicado 2013
    “…Backgrounds such as multi-jet and top-quark-pair production are subtracted and the results are corrected for detector effects. …”
    Enlace del recurso
    Measurement of $k_t$ splitting scales in $W\to \ell \nu$ events at $\sqrt{s}$ = 7 TeV
  18. 15218
    por Swiatlowski, M
    Publicado 2013
    “…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. …”
    Enlace del recurso
    New Jet Substructure Techniques at ATLAS
  19. 15219
    por Dorigo, Tommaso
    Publicado 2014
    “…The large sample of top quark events collected in 2011 and 2012 have allowed world-class measurements of its mass; the combination of those results is $M_t =173.49 \pm 0.36 \pm 0.91$ GeV. …”
    Enlace del recurso
    A CMS overview talk
  20. 15220
    por Pal, Bilas Kanti
    Publicado 2014
    “…The ratio of lifetimes is measured to be $0.971\pm0.007\pm0.005$, in agreement with theoretical expectations based on the heavy quark expansion. Using previous determinations of the $\bar{B}^{0}$ meson lifetime, the $\Lambda_{b}^0$ lifetime is found to be $1.476 \pm 0.010 \pm 0.010$ ps. …”
    Enlace del recurso
    Precision measurement of the $\Lambda_{b}^0$ baryon lifetime
Herramientas de búsqueda: RSS