Phenomenological signatures of additional scalar bosons at the LHC

Abstract

We investigate the search prospects for new scalars beyond the Standard Model (SM) at the Large Hadron Collider (LHC). In these studies two real scalars $S$ and $\chi$ have been introduced in a two Higgs doublet model (2HDM), where $S$ is a portal to dark matter (DM) through its interaction with $\chi$, a DM candidate and a possible source of missing transverse energy (\MET). Previous studies focused on a heavy scalar $H$ decay mode $H\to h\chi \chi$, which was studied using an effective theory in order to explain a distortion in the Higgs ($h$) transverse momentum spectrum [16]. In this work, the effective decay is understood more deeply by including a mediator $S$, and the focus is changed to $H\to hS,SS$ with $S\to \chi \chi$. Phenomenological signatures of all the new scalars in the proposed 2HDM are discussed in the energy regime of the LHC, and their mass bounds have been set accordingly. Additionally, we have performed several analyses with final states including leptons and \MET, with $H\to 4W$, $t\bar{t}H\to 6W$ and $A\to ZH$ channels, in order to understand the impact these scalars have on current searches.

18 pages, 6 figures, 3 tables, modified texts

References in corpus (9)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• Measurements of Higgs boson production and couplings in the four-lepton channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• Next-to-leading order QCD corrections to t-tbar-Z production at the LHC
• Search for a CP-odd Higgs boson decaying to $Zh$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Constraining BSM Physics at the LHC: Four top final states with NLO accuracy in perturbative QCD
• Extending two-Higgs-doublet models by a singlet scalar field - the Case for Dark Matter
• Search for physics beyond the standard model in events with two leptons, jets, and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV

Cited by in corpus (67)

• The N2HDM under Theoretical and Experimental Scrutiny
• BSMPT - Beyond the Standard Model Phase Transitions -A Tool for the Electroweak Phase Transition in Extended Higgs Sectors
• Explaining $(g-2{)}_{\mu ,e}$, the KOTO anomaly and the MiniBooNE excess in an extended Higgs model with sterile neutrinos
• Phenomenological Comparison of Models with Extended Higgs Sectors
• Self-consistent Dark Matter Simplified Models with an s-channel scalar mediator
• Unveiling Hidden Physics at the LHC
• $B$-meson anomalies and Higgs physics in flavored $U(1{)}^{\prime }$ model
• Anomalies in Particle Physics
• The emergence of multi-lepton anomalies at the LHC and their compatibility with new physics at the EW scale
• Anatomy of inclusive $t\overline{t}W$ production at hadron colliders
• Search for Higgs boson pair production in the $W{W}^{(\ast )}W{W}^{(\ast )}$ decay channel using ATLAS data recorded at $\sqrt{s}=13$ TeV
• Connecting the Muon Anomalous Magnetic Moment and the Multi-lepton Anomalies at the LHC
• Search for dark matter in association with a Higgs boson decaying to two photons at $\sqrt{s}$= 13 TeV with the ATLAS detector
• Two Higgs Doublets and a Complex Singlet: Disentangling the Decay Topologies and Associated Phenomenology
• Nucleation is More than Critical -- A Case Study of the Electroweak Phase Transition in the NMSSM
• Two Higgs Doublet Dark Matter Portal
• Simultaneous Search for Extra Light and Heavy Higgs Bosons via Cascade Decays
• Comparing 2HDM $+$ Scalar and Pseudoscalar Simplified Models at LHC
• Di-higgs enhancement by neutral scalar as probe of new colored sector
• Asymmetric di-Higgs signals of the next-to-minimal 2HDM with a $U(1)$ symmetry
• LHC Search of New Higgs Boson via Resonant Di-Higgs Production with Decays into 4W
• $(g-2{)}_{\mu }$ in the 2HDM and slightly beyond -- an updated view
• Roadmap to explore vectorlike quarks decaying to a new scalar or pseudoscalar
• Asymptotic safety and Conformal Standard Model
• Neutrino Masses in a Two Higgs Doublet Model with a U(1) Gauge Symmetry
• Gauge-independent Renormalization of the N2HDM
• The anomalous production of multi-lepton and its impact on the measurement of $Wh$ production at the LHC
• Muon $(g-2)$ in the B-LSSM
• Measuring CP nature of top-Higgs couplings at the future Large Hadron electron collider
• Neutrino and CP-even Higgs boson masses in a nonuniversal $\mathrm{U}(1{)}^{\prime }$ extension
• Wrong Sign Bottom Yukawa in Low Energy Supersymmetry
• Constraints on a 2HDM with a singlet scalar and implications in the search for heavy bosons at the LHC
• Vacuum stability and scalar masses in the superweak extension of the standard model
• Dark matter and electroweak phase transition in the mixed scalar dark matter model
• Consistency and Interpretation of the LHC (Di-)Di-Jet Excesses
• Muon anomalous magnetic dipole moment in the $\mu \nu$SSM
• Spin portal to dark matter
• Anatomy of the Real Higgs Triplet Model
• Clues on the Majorana scale from scalar resonances at the LHC
• Prospects for Heavy Scalar Searches at the LHeC
• Projections for Neutral Di-Boson and Di-Higgs Interactions at FCC-he Collider
• A U(1) non-universal anomaly-free model with three Higgs doublets and one singlet scalar field
• Connecting multi-lepton anomalies at the LHC and in Astrophysics with MeerKAT/SKA
• Impact of additional bosons on the exploration of the Higgs boson at the LHC
• The FIMP-WIMP dark matter in the extended singlet scalar model
• Search for a new heavy scalar particle decaying into a Higgs boson and a new scalar singlet in final states with one or two light leptons and a pair of $\tau$-leptons with the ATLAS detector
• Discovery Potential of Future Electron-Positron Colliders for a 95 GeV Scalar
• Exploring CP-even scalars of a Two Higgs-doublet model in future $e^{-}p$ colliders
• Varying gauge couplings and collider phenomenology
• Robustness of ARS Leptogenesis in Scalar Extensions
• Reconciling Higgs physics and pseudo-Nambu-Goldstone dark matter in the S2HDM using a genetic algorithm
• NLO QCD predictions for off-shell $t\bar{t}W$ production in association with a light jet at the LHC
• Quantum interference effects in Higgs boson pair-production beyond the Standard Model
• NLO QCD corrections to off-shell $t\bar{t}{W}^{\pm }$ production at the LHC: Correlations and Asymmetries
• Study on the global minimum and $H\to \gamma \gamma$ in the Dirac scotogenic model
• Interpretation of LHC excesses at 95 GeV and 152 GeV in an extended Georgi-Machacek model
• Machine learning approach for the search of resonances with topological features at the Large Hadron Collider
• Particle-level transformers for 95 GeV Higgs boson searches at future $e^{+}{e}^{-}$ Higgs factories
• Measuring properties of a Heavy Higgs boson in the $H\to ZZ\to 4\ell$ decay
• The Madala hypothesis with Run 1 and 2 data at the LHC
• Pair production of the Elementary Goldstone Higgs boson at the LHC
• Exploring LHC Run 1 and 2 data using the Madala hypothesis
• Multi-Lepton Probes of the Drell-Yan Production of Triplet Higgses
• Feasibility of the observation of a heavy scalar through the fully hadronic final state at the LHeC
• What Can Gamma-rays from Space tell us About the Madala Hypothesis?
• Search for heavy resonances in final states with four leptons and missing transverse momentum or jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Trials Factor for Semi-Supervised NN Classifiers in Searches for Narrow Resonances at the LHC