28 research outputs found

    Search for new Higgs bosons via same-sign top quark pair production in association with a jet in proton-proton collisions at s\sqrt{s} = 13 TeV

    No full text
    International audienceA search is presented for new Higgs bosons in proton-proton (pp) collision events in which a same-sign top quark pair is produced in association with a jet, via the pp ‚Üí\to tH/A ‚Üí\to ttňČ\mathrm{\bar{t}}c and pp ‚Üí\to tH/A ‚Üí\to ttňČ\mathrm{\bar{t}}u processes. Here, H and A represent the extra scalar and pseudoscalar boson, respectively, of the second Higgs doublet in the generalized two-Higgs-doublet model (g2HDM). The search is based on pp collision data collected at a center-of-mass energy of 13 TeV with the CMS detector at the LHC, corresponding to an integrated luminosity of 138 fb‚ąí1^{-1}. Final states with a same-sign lepton pair in association with jets and missing transverse momentum are considered. New Higgs bosons in the 200-1000 GeV mass range and new Yukawa couplings between 0.1 and 1.0 are targeted in the search, for scenarios in which either H or A appear alone, or in which they coexist and interfere. No significant excess above the standard model prediction is observed. Exclusion limits are derived in the context of the g2HDM

    Search for the lepton flavor violating ŌĄ‚Üí\tau \to 3őľ\mu decay in proton-proton collisions at s\sqrt{s} = 13 TeV