LHC signals of a heavy doublet Higgs as dark matter portal: cut-based approach and improvement with gradient boosting and neural networks

Abstract

Though the 125-GeV scalar, as the Higgs boson of the standard model, is disfavoured as a dark matter portal by direct searches and the observations on relic density, a heavier scalar in an extended electroweak sector can fit into that role. We explore this possibility in the context of two Higgs doublet models (2HDM). Taking Type I and Type II 2HDM as illustration, and assuming a scalar gauge singlet dark matter particle, we show that the heavy neutral CP-even scalar ($H$) can (a) serve as dark matter portal consistently with all data, and (b) have a substantial invisible branching ratio, over a wide region of the parameter space. Using this fact, we estimate rates of LHC signals where $H$ is produced via ({\it i}) gluon fusion, in association with a hard jet, and ({\it ii}) vector boson fusion. Invisible decays of the $H$ can then lead to monojet + $\slashed{E_T}$ in ({\it i}), and two forward jets with large rapidity gap + $\slashed{E_T}$ in ({\it ii}). The second kind of signal usually yields better significance for the high-luminosity run. We also supplement our cut-based analyses with those based on gradient boosted decision trees (XGboost) and artificial neural network (ANN) techniques, where the statistical significance distinctly improves, especially for Type II 2HDM.

37 pages, 67 figures

References in corpus (47)

• XGBoost: A Scalable Tree Boosting System
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• DELPHES 3, A modular framework for fast simulation of a generic collider experiment
• Theory and phenomenology of two-Higgs-doublet models
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Dark Matter Search Results from a One Tonne$\times$Year Exposure of XENON1T
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Searching for Exotic Particles in High-Energy Physics with Deep Learning
• Searching for Dark Matter Annihilation from Milky Way Dwarf Spheroidal Galaxies with Six Years of Fermi-LAT Data
• 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
• Complete Tenth-Order QED Contribution to the Muon g-2
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Refinements in electroweak contributions to the muon anomalous magnetic moment
• Observation of the rare $B_s^0\to {\mu }^{+}{\mu }^{-}$ decay from the combined analysis of CMS and LHCb data
• Lee-Quigg-Thacker Bounds for Higgs Boson Masses in a Two-Doublet Model
• Search for dark matter and other new phenomena in events with an energetic jet and large missing transverse momentum using the ATLAS detector
• Tree-level unitarity constraints in the most general 2HDM
• Search for invisible decays of a Higgs boson produced through vector boson fusion in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Direct detection of Higgs-portal dark matter at the LHC
• Observation of the Higgs boson decay to a pair of tau leptons with the CMS detector
• Higgs portal, fermionic dark matter, and a Standard Model like Higgs at 125 GeV
• Anomalous Higgs boson couplings in vector boson fusion at the CERN LHC
• Searching for H --> tau tau in weak boson fusion at the LHC
• Combination of searches for invisible Higgs boson decays with the ATLAS experiment
• Vacuum Stability Bounds in the Two-Higgs Doublet Model
• Searches for invisible decays of the Higgs boson in pp collisions at sqrt(s) = 7, 8, and 13 TeV
• Evidence for B- -> tau- nu_tau-bar with a Hadronic Tagging Method Using the Full Data Sample of Belle
• Pseudoscalar Portal Dark Matter
• Extending two-Higgs-doublet models by a singlet scalar field - the Case for Dark Matter
• The Fermionic Dark Matter Higgs Portal: an effective field theory approach
• Direct and Indirect Singlet Scalar Dark Matter Detection in the Lepton-Specific two-Higgs-doublet Model
• Electroweak Precision Tests of the Standard Model after the Discovery of the Higgs Boson
• Update of Global Two-Higgs-Doublet Model Fits
• Muon g-2 in the 2HDM: maximum results and detailed phenomenology
• Collider Signatures of Higgs-portal Scalar Dark Matter
• Constraining Higgs mediated dark matter interactions
• Unitarity constraints on scalar parameters of the Standard and Two Higgs Doublets Model
• Invisible charginos and neutralinos from gauge boson fusion : a way to explore anomaly mediation ?
• Scalar Dark Matter in Leptophilic Two-Higgs-Doublet Model
• High-scale validity of a two Higgs doublet scenario: predicting collider signals
• Soft diffraction at the LHC and properties of the Pomeron
• Top quark anomalous FCNC production via $tqg$ couplings at FCC-hh
• Wrong sign Yukawa coupling of the 2HDM plus a singlet scalar dark matter confronted with dark matter and Higgs data
• A light scalar dark matter extension of the type-II two-Higgs-doublet model
• Neural Networks Search for Charged Higgs Boson of Two Doublet Higgs Model at the Hadrons Colliders

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• LHC signals of triplet scalars as dark matter portal: cut-based approach and improvement with gradient boosting and neural networks
• Towards a method to anticipate dark matter signals with deep learning at the LHC
• A machine learning-based methodology for pulse classification in dual-phase xenon time projection chambers
• Machine Learning Techniques for Intermediate Mass Gap Lepton Partner Searches at the Large Hadron Collider
• The Influence of Lepton Portal on the WIMP-pFIMP framework
• Indian Contributions to LHC Theory
• Search for Dark Matter in 2HDMS at LHC and future Lepton Colliders
• Vector Dark Matter in a $U(1{)}_X$ extended 2HDM