Search for Associated Production of a Single Top Quark and a Higgs Boson in Leptonic Channels

Collaboration
2015
20 pages
Report number:
  • CMS-PAS-HIG-14-026
Experiments:

Citations per year

201520162017201851
Abstract:
A search for the production of a Higgs boson in association with a single top quark is presented, focusing on leptonic signatures provided by the HWW\mathrm{H}\rightarrow\mathrm{W}\mathrm{W} and Hττ\mathrm{H}\rightarrow\tau\tau decay modes. Due to a strong interference of the two main contributing diagrams, the production cross section of this process benefits from a substantial enhancement in the case of negative values of the top-Higgs coupling, CtC_{\mathrm{t}}. The analysis exploits signatures with two same-sign and three leptons in the final state, and uses the full data sample collected with the CMS detector at the LHC at a center of mass energy of 8~TeV, which corresponds to an integrated luminosity of 19.7±0.5fb119.7 \pm 0.5\,\mathrm{fb}^{-1}. Multivariate techniques are used to discriminate the signal from the dominant backgrounds. The analysis yields a 95\% confidence level upper limit on the single top quark plus Higgs boson production cross section of 6.7 times the expectation for CtC_{\mathrm{t}}~=~-1, with an expected limit of 5.0.
Note:
  • Preliminary results
  • Data
  • Higgs particle: associated production
  • top: single production
  • Higgs particle: decay modes
  • signature: leptonic
  • lepton: multiplicity
  • CERN LHC Coll
  • interference
  • enhancement
  • background