3,605 research outputs found

    Higgs boson studies at CMS

    Get PDF
    Higgs boson studies at the Compact Muon Solenoid (CMS) with an integrated luminosity of 5 fb−1 at 7TeV and up to 12.2 fb −1 at 8TeV in the center of mass are presented. After a brief description of the CMS detector and production and decay of the Higgs boson at the LHC, the main Higgs analyses at CMS are described: H → γγ, H → ZZ, H → W+W−, H → b¯ b, H → τ+τ−. The statistical combination of the results from all channels is presented. The new particle existence is now well established, with an observed significance of 6.9σ, a signal strength μ = 0.88 ± 0.21 times the standard model and a measured mass mH = 125.8±0.4(stat.)±0.4(syst.) GeV. No significant deviation from the standard model Higgs boson hypothesis was found

    Les Houches 2013: Physics at TeV Colliders: Standard Model Working Group Report

    Full text link
    This Report summarizes the proceedings of the 2013 Les Houches workshop on Physics at TeV Colliders. Session 1 dealt primarily with (1) the techniques for calculating standard model multi-leg NLO and NNLO QCD and NLO EW cross sections and (2) the comparison of those cross sections with LHC data from Run 1, and projections for future measurements in Run 2.Comment: Proceedings of the Standard Model Working Group of the 2013 Les Houches Workshop, Physics at TeV Colliders, Les houches 3-21 June 2013. 200 page

    Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV

    Get PDF
    A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7 TeV is presented. The data were collected at the LHC, with the CMS detector, and correspond to an integrated luminosity of 4.6 inverse femtobarns. No significant excess is observed above the background expectation, and upper limits are set on the Higgs boson production cross section. The presence of the standard model Higgs boson with a mass in the 270-440 GeV range is excluded at 95% confidence level.Comment: Submitted to JHE

    Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV