Signature of the Maximally Symmetric 2HDM via $W^{\pm }/Z$-Quadruplet Productions at the LHC

Abstract

We consider the Maximally Symmetric Two-Higgs Doublet Model (MS-2HDM) in which the so-called Standard Model (SM) alignment can be achieved naturally by the virtue of an SO(5) symmetry imposed on the 2HDM. We investigate the signature of the MS-2HDM via $pp\to HX\to V{V}^{\ast }X$ and $pp\to HHX\to V{V}^{\ast }{V}^{\prime }{V}^{\prime \ast }X$ processes at the LHC for different values of $\tan \beta$. We perform our calculations with NLO QCD accuracy, using the \textsf{Herwig~7} multi-purpose event generator at $\sqrt{s}=13$~TeV center-of-mass energy. We show that the production of single SM-like Higgs bosons via $W^{\pm }/Z$-pairs is completely aligned with the SM. Interestingly, the presence of the heavy Higgs states significantly enhances the cross-section for the $W^{\pm }/Z$-quadruplet production channels in the low-$p_{\perp }$ regions. These vital analyses may aid the future discovery of this minimal and very predictive extension of the SM and can be generalised to other realisations of the 2HDM.

20 pages, 12 figures

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Cited by in corpus (5)

• Maximally Symmetric Three Higgs Doublet Model
• Implementation of Angularly Ordered Electroweak Parton Shower in Herwig 7
• Explaining excesses in four-leptons at the LHC with a double peak from a CP violating Two Higgs Doublet Model
• Electroweak Radiative Corrections in Precision LHC Measurements of $W^{\pm }/Z^0$+jets
• Generalized angular-order parton showers in Herwig 7