Search for Heavy Higgs Bosons $A/H$ Decaying to a Top Quark Pair in $pp$ Collisions at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ with the ATLAS Detector

Aaboud, Morad; Aad, Georges; Abbott, Brad; Abdinov, Ovsat; Abeloos, Baptiste; Abidi, Syed Haider; AbouZeid, Ossama; Abraham, Nicola; Abramowicz, Halina; Abreu, Henso

doi:10.1103/PhysRevLett.119.191803

Search for Heavy Higgs Bosons $A/H$ Decaying to a Top Quark Pair in $pp$ Collisions at $\sqrt{s}=8\text{ }\text{ }\mathrm{TeV}$ with the ATLAS Detector

ATLAS

Collaboration

Jul 19, 2017

20 pages

Published in:

Phys.Rev.Lett. 119 (2017) 19, 191803

Published: Nov 9, 2017

e-Print:

1707.06025 [hep-ex]

DOI:

10.1103/PhysRevLett.119.191803

PDG: Mass Limits in General two-Higgs-doublet Models

Report number:

CERN-EP-2017-134

Experiments:

CERN-LHC-ATLAS

View in:

reference search149 citations

Citations per year

Abstract: (APS)

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.

Note:

30 pages in total, author list starting page 14, 3 figures, 3 tables, published version. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2016-04/

p p: colliding beams
top: pair production
Higgs particle: heavy
Higgs particle: hadronic decay
interference: effect
transverse momentum: missing-energy
p p: scattering
ATLAS
CERN LHC Coll
mass spectrum: (2top)

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