• Open Access

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

M. Aaboud et al. (ATLAS Collaboration)
Phys. Rev. Lett. 119, 191803 – Published 9 November 2017

Abstract

A search for heavy pseudoscalar (A) and scalar (H) Higgs bosons decaying into a top quark pair (tt¯) has been performed with 20.3fb1 of proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider at a center-of-mass energy s=8TeV. 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>500GeV.

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  • Received 20 July 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.191803

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2017 CERN, for the ATLAS Collaboration

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Vol. 119, Iss. 19 — 10 November 2017

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