Search for ttbar resonances in dilepton+jets final states in pp collisions at 8 TeV

Collaboration
2014
17 pages
Report number:
  • CMS-PAS-B2G-12-007
Experiments:

Citations per year

201420152016201713
Abstract:
We present a model-independent search for heavy resonances decaying to ttˉ\rm{t\bar{t}} pairs using 19.7~fb1\rm{fb^{-1}} of data recorded by the CMS detector in pppp collisions at s=8\sqrt{s} = 8~TeV. The search is based on events containing two leptons (electron or muon) , at least two jets, and large missing transverse energy. No deviation is observed over the expected rate from standard model processes. 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. Lower mass limits are set for the decays of narrow and wide width leptophobic topcolor Z' bosons, as well as for Kaluza-Klein gluon excitations as predicted in theories beyond the standard model.
Note:
  • Preliminary results
  • Data
  • p p: scattering
  • resonance: heavy
  • resonance: search for
  • top: pair production
  • dilepton: final state
  • jet: final state
  • transverse energy: missing-energy
  • cross section: branching ratio: upper limit
  • Z': mass