Search for heavy Higgs bosons A=H decaying to a top quark pair in pp collisions at √s=8 TeV with the ATLAS detector

Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and and, The ATLAS Collaboration (2017) Search for heavy Higgs bosons A=H decaying to a top quark pair in pp collisions at √s=8 TeV with the ATLAS detector. Physical Review Letters (PRL), 119 (19). ISSN 0031-9007

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Abstract

A search for heavy pseudoscalar (A) and scalar (H) Higgs bosons decaying into a top quark pair (t¯t) 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=8TeV. Interference effects between the signal process and standard model t¯t 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 t¯t 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, tan β, for mA=H > 500 GeV.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics
Depositing User: Billy Wichaidit
Date Deposited: 24 Nov 2017 14:11
Last Modified: 24 Nov 2017 14:11
URI: http://sro.sussex.ac.uk/id/eprint/71551

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Project NameSussex Project NumberFunderFunder Ref
ATLASG0275STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/I006048/1