Search for Heavy Higgs Bosons A /H Decaying to a Top Quark Pair in pp Collisions at s =8 TeV with the ATLAS Detector

Research output: Contribution to journalArticle

Abstract

A search for heavy pseudoscalar (A) and scalar (H) Higgs bosons decaying into a top quark pair (tt) has been performed with 20.3 fb-1 of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy s=8 TeV. Interference effects between the signal process and standard model tt production, which are expected to distort the signal shape from a single peak to a peak-dip structure, are taken into account. No significant deviation from the standard model prediction is observed in the tt invariant mass spectrum in final states with an electron or muon, large missing transverse momentum, and at least four jets. The results are interpreted within the context of a type-II two-Higgs-doublet model. Exclusion limits on the signal strength are derived as a function of the mass mA/H and the ratio of the vacuum expectation values of the two Higgs fields, tanβ, for mA/H>500 GeV. © 2017 CERN.

Details

Authors
Organisations
External organisations
  • University of Toronto
  • Mohamed Premier University
  • Aix-Marseille University
  • University of Oklahoma
  • Institute of Physics Azerbaijan National Academy of Sciences
  • University of Paris-Sud
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Subatomic Physics

Keywords

  • Elementary particles, High energy physics, Mass spectrometry, Signal processing, Tellurium compounds, Expectation values, Higgs doublet models, Interference effects, Invariant-mass spectra, Large Hadron Collider, Proton proton collisions, The standard model, Transverse momenta, Bosons
Original languageEnglish
JournalPhysical Review Letters
Volume119
Issue number19
Publication statusPublished - 2017
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

Export Date: 8 December 2017