Probing Exotic Triple Higgs Couplings at the LHC

Abstract

In extended Higgs sectors that exhibit alignment without decoupling, the additional scalars are allowed to have large couplings to the Standard Model Higgs. We show that current nonresonant di-Higgs searches can be straightforwardly adapted to look for additional Higgses in these scenarios, where pair production of non-SM Higgses can be enhanced. For concreteness, we study pair production of exotic Higgses in the context of an almost inert two Higgs doublet model, where alignment is explained through an approximate ${\mathbb{Z}}_2$ symmetry under which the additional scalars are odd. In this context, the smallness of the ${\mathbb{Z}}_2$ violating parameter suppresses single production of exotic Higgses, but it does not prevent a sizeable trilinear coupling $hHH$ between the SM Higgs ($h$) and the additional states ($H$). We study the process $pp\to h^{\ast }\to HH$ in the final states $b\bar{b}b\bar{b}$, $b\bar{b}\gamma \gamma$, and multi-leptons. We find that at the HL-LHC these modes could be sensitive to masses of the additional neutral scalars in the range $130\mbox{ GeV} \lesssim m_H \lesssim 290\mbox{ GeV}$.

arXiv commentmatches JHEP version

References in corpus (27)

• A Brief Introduction to PYTHIA 8.1
• MadGraph 5 : Going Beyond
• Verifiable Radiative Seesaw Mechanism of Neutrino Mass and Dark Matter
• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• The CP-conserving two-Higgs-doublet model: the approach to the decoupling limit
• Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders
• The Inert Doublet Model: an Archetype for Dark Matter
• Pair Production of Neutral Higgs Particles in Gluon--Gluon Collisions
• Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector
• Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Dark matter in the Inert Doublet Model after the discovery of a Higgs-like boson at the LHC
• Impersonating the Standard Model Higgs Boson: Alignment without Decoupling
• Delphes, a framework for fast simulation of a generic collider experiment
• Anatomy of the Inert Two Higgs Doublet Model in the light of the LHC and non-LHC Dark Matter Searches
• An Updated Analysis of Inert Higgs Doublet Model in light of the Recent Results from LUX, PLANCK, AMS-02 and LHC
• Combination of searches for invisible Higgs boson decays with the ATLAS experiment
• Search for resonant pair production of Higgs bosons decaying to two bottom quark-antiquark pairs in proton-proton collisions at 8 TeV
• Inert Doublet Model in light of LHC Run I and astrophysical data
• Inert Doublet Model in the light of LHC and astrophysical data
• Evolution of Universe to the present inert phase
• Combination of searches for Higgs boson pair production in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for Higgs boson pair production in events with two bottom quarks and two tau leptons in proton-proton collisions at sqrt(s) = 13 TeV
• Bisection-based asymmetric MT2 computation: a higher precision calculator than existing symmetric methods
• Search for Higgs boson pair production in the $\gamma \gamma b\bar{b}$ final state with 13 TeV $pp$ collision data collected by the ATLAS experiment
• Search for non-pointing and delayed photons in the diphoton and missing transverse momentum final state in 8 TeV $pp$ collisions at the LHC using the ATLAS detector
• Search for an exotic decay of the Higgs boson to a pair of light pseudoscalars in the final state with two muons and two b quarks in pp collisions at 13 TeV
• Almost Inert Higgs Bosons at the LHC

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• Invisible Higgs search through Vector Boson Fusion: A deep learning approach
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