Vincent Hedberg
Senior lecturer
Search for Heavy Higgs Bosons A /H Decaying to a Top Quark Pair in pp Collisions at s =8 TeV with the ATLAS Detector
Author
Summary, in English
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.
Department/s
- Particle and nuclear physics
- eSSENCE: The e-Science Collaboration
Publishing year
2017
Language
English
Publication/Series
Physical Review Letters
Volume
119
Issue
19
Document type
Journal article
Publisher
American Physical Society
Topic
- 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
Status
Published
ISBN/ISSN/Other
- ISSN: 1079-7114