Probing Type-I 2HDM light Higgs in the top-pair-associated diphoton channel

Abstract

Motivated by the possible 95 GeV diphoton excess, we investigate the capability of the Type-I Two-Higgs-Doublet Model (2HDM-I) to explain this signal under current theoretical and experimental constraints. Using full Monte Carlo (MC) simulations for the process of $pp\to t(\to W^{+}b)\bar{t}(\to W^{-}\bar{b})h(\to \gamma \gamma )$, we evaluate the discovery potential of a 95 GeV Higgs boson at future colliders. Direct Higgs searches strongly constrain the parameter $\alpha$, excluding the region with $\alpha \lesssim 0.95$. Monte Carlo results indicate that a minimum cross section of 0.3 fb is required to achieve a $5\sigma$ signal statistical significance at the HL-LHC with $L=3{\mathrm{ab}}^{-1}$. For the same luminosity, HE-LHC and FCC-hh require 0.67 fb and 2.36 fb, respectively. At the 14 TeV HL-LHC with an integrated luminosity of $3{\mathrm{ab}}^{-1}$, parameter regions with $\sin (\beta -\alpha )\gtrsim 0.4$ and $\sin (\beta -\alpha )\gtrsim 0.25$ can be probed at the $5\sigma$ and $2\sigma$ significance levels, respectively. At the 27 TeV HE-LHC with $L=10{\mathrm{ab}}^{-1}$, the sensitivity improves to $\sin (\beta -\alpha )\gtrsim 0.25$ ($5\sigma$) and $\gtrsim 0.15$ ($2\sigma$). For the 100 TeV FCC-hh with $L=30{\mathrm{ab}}^{-1}$, even regions with $\sin (\beta -\alpha )\gtrsim 0.1$ or $\sin (\beta -\alpha )\lesssim -0.05$ can be covered at the $5\sigma$ level. Parameter regions near $\sin (\beta -\alpha )\approx 0$ remain challenging to probe in the diphoton channel, even with increased energy or luminosity.

17 pages, 7 figures, 4 tables, Accepted by PRD

References in corpus (44)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• 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
• LHAPDF6: parton density access in the LHC precision era
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• Automatic Calculation of supersymmetric Renormalization Group Equations and Self Energies
• A portrait of the Higgs boson by the CMS experiment ten years after the discovery
• SARAH 3.2: Dirac Gauginos, UFO output, and more
• A detailed map of Higgs boson interactions by the ATLAS experiment ten years after the discovery
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.20 ppm
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Models of Yukawa interaction in the two Higgs doublet model, and their collider phenomenology
• SuperIso: A program for calculating the isospin asymmetry of B -> K* gamma in the MSSM
• HiggsSignals-2: Probing new physics with precision Higgs measurements in the LHC 13 TeV era
• Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$
• Consistency of the Two Higgs Doublet Model and CP violation in top production at the LHC
• Analysis of neutral $B$-meson decays into two muons
• Measurement of the B${}_{\mathrm{S}}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ decay properties and search for the B${}^0$ $\to$ ${\mu }^{+}{\mu }^{-}$ decay in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Possible indications for new Higgs bosons in the reach of the LHC: N2HDM and NMSSM interpretations
• The CMS di-photon excess at 95 GeV in view of the LHC Run 2 results
• Enhancement of h --> gamma gamma in the Two Higgs Doublet Model Type I
• The 95.4 GeV di-photon excess at ATLAS and CMS
• A joint explanation of W-mass and muon g-2 in 2HDM
• $SU(2{)}_L$ triplet scalar as the origin of the 95 GeV excess?
• Measurement of Higgs boson decay into $b$-quarks in associated production with a top-quark pair in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Asymmetric di-Higgs signals of the next-to-minimal 2HDM with a $U(1)$ symmetry
• A 95 GeV Higgs Boson in the Georgi-Machacek Model
• Explanation of the 95 GeV $\gamma \gamma$ and $b\bar{b}$ excesses in the Minimal Left-Right Symmetric Model
• $M_W$, Dark Matter and $a_{\mu }$ in the NMSSM
• The 95 GeV Excess in the Georgi-Machacek Model: Single or Twin Peak Resonance
• Two-loop Prediction of the Anomalous Magnetic Moment of the Muon in the Two-Higgs Doublet Model with GM2Calc 2
• The scale invariant scotogenic model: CDF-II $W$-boson mass and the 95 GeV excesses
• Superposition of CP-Even and CP-Odd Higgs Resonances: Explaining the 95 GeV Excesses within a Two-Higgs Doublet Model
• Vector dark matter and LHC constraints, including a 95 GeV light Higgs boson
• 95 GeV light Higgs in the top-pair-associated diphoton channel at the LHC in the minimal dilaton model
• Analysis of $W^{\pm }+4\gamma$ in the 2HDM Type-I at the LHC
• Measurement of the associated production of a top-antitop-quark pair and a Higgs boson decaying into a $b\bar{b}$ pair in $pp$ collisions at $\sqrt{s}=13$ TeV using the ATLAS detector at the LHC
• Search for diphoton resonances in the 66 to 110 GeV mass range using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for a lighter neutral custodial fiveplet scalar in the Georgi-Machacek model
• Is there a (Pseudo)Scalar at 95 GeV?
• Prospect study for measurement of $Hb\bar{b}$ coupling at the LHC and FCC-hh

Cited by in corpus (3)

• Testing a 95 GeV Scalar at the CEPC with Machine Learning
• Interpreting the 650 GeV and 95 GeV Higgs anomalies in the next-to-two-Higgs-doublet model
• Particle-level transformers for 95 GeV Higgs boson searches at future $e^{+}{e}^{-}$ Higgs factories