Heavy Higgs boson coupled to vectorlike quarks: Strong CP problem and search prospects at the 14 TeV LHC

Heavy Higgs boson coupled to vectorlike quarks: Strong CP problem and search prospects at the 14 TeV LHC

Author Alves, Alexandre Autor UNIFESP Google Scholar
Camargo, Daniel A. Google Scholar
Dias, Alex G. Google Scholar
Abstract Motivated by a solution to the strong CP problem, we propose a model where a new heavy neutral CP-even Higgs boson couples to vectorlike quarks enhancing its production cross section whose dominant decays are into weak bosons. The masses of the vectorlike quarks are generated through interactions with a singlet scalar field charged under a broken global U(1) symmetry, providing a solution to the strong CP problem by means of the Peccei-Quinn mechanism. The diboson excess observed by the ATLAS Collaboration is discussed as the new heavy Higgs boson is a candidate to explain a possible signal in this channel. We also show that the 14 TeV LHC is capable of discovering this heavy Higgs with masses up to 1 TeV in the H -> ZZ -> l(+)l(-)l'(+)l'(-) search channel using boosted decision trees to better discriminate between signals and backgrounds and to tame systematic uncertainties in the background rates.
xmlui.dri2xhtml.METS-1.0.item-coverage College Pk
Language English
Sponsor Brazilian agency CNPq
Brazilian agency FAPESP
Brazilian agency CAPES
Grant number CNPq: 303094/2013-3
CNPq: 307098/2014-1
FAPESP: 2013/22079-8
Date 2016
Published in Physical Review D. College Pk, v. 94, n. 1, p. -, 2016.
ISSN 2470-0010 (Sherpa/Romeo, impact factor)
Publisher Amer Physical Soc
Extent -
Origin http://dx.doi.org/10.1103/PhysRevD.94.015027
Access rights Closed access
Type Article
Web of Science ID WOS:000380112100005
URI https://repositorio.unifesp.br/handle/11600/57533

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