arXiv : Electroweak production of Higgs boson pairs in 2HDMs

Munir, Shoaib; Klemm, William; Moretti, Stefano

doi:10.22323/1.282.1174

Published Articles
Report number	P17030 ; KIAS-P17030 ; arXiv:1704.06405
Title	Electroweak production of Higgs boson pairs in 2HDMs
Related title	Electroweak production of Higgs boson pairs in 2HDMs
Author(s)	Munir, Shoaib (Uppsala U.) ; Klemm, William ; Klemm, William (Uppsala U.) ; Moretti, Stefano (CERN)
Imprint	2017-04-21
Number of pages	4
Note	4 pages, 2 figures; Proceedings of the 38th International Conference on High Energy Physics (ICHEP2016)
In:	PoS ICHEP2016 (2017) 1174
In:	38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.1174
DOI	10.22323/1.282.1174
Subject category	hep-ph ; Particle Physics - Phenomenology
Abstract	One of the main features of a Two-Higgs Doublet Model (2HDM) is the presence of two additional neutral Higgs states, besides the one mimicking the 125 GeV state observed at the LHC. The three Higgs bosons of a 2HDM can be produced at the LHC either singly via gluon fusion or in pairs with each other. When analyzing their pair production, the emphasis is laid on gluon-initiated processes, and the electroweak (EW) production is generally not treated on the same footing, assuming its contribution to be highly subleading. We show here that when the sum of the masses of the lightest scalar and pseudoscalar Higgs bosons in the Type-I 2HDM is smaller than the Z-boson mass, their EW pair production can dominate over QCD pair production by orders of magnitude.
Copyright/License	arXiv nonexclusive-distrib. 1.0 publication: (License: CC-BY-NC-SA)

$Points satisfying all the constraints imposed during the scan and additionally lying within the experimental uncertainty on the $Z \to h A$ partial width, at the $1\sigma$ (lighter) and $2\sigma$ (darker) levels, assuming $\cos(\beta-\alpha)=1$. The small red region corresponds to $m_h > 2m_A$, allowing $h\to A A$ decays. The three benchmark points have been highlighted in yellow, and the color map corresponds to the total cross section. for the $q\bar{q}\to hA$ process at $\sqrt{s}=13$\ TeV.$ $Left: Cross sections for QCD vs. EW production of $hA$ pairs at the LHC, for the good points from the parameter space scan of Type-I 2HDM, with the color map showing the mass of $A$. Right: Cross sections for two of the main production modes of the accompanying $H^\pm$, which decays via $W^\pm h$ or $W^\pm A$ and its mass is indicated by the color map.$ $Left: Cross sections for QCD vs. EW production of $hA$ pairs at the LHC, for the good points from the parameter space scan of Type-I 2HDM, with the color map showing the mass of $A$. Right: Cross sections for two of the main production modes of the accompanying $H^\pm$, which decays via $W^\pm h$ or $W^\pm A$ and its mass is indicated by the color map.$ Show more plots

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