Pseudoscalar Portal Dark Matter and New Signatures of Vector-like Fermions

Abstract

Fermionic dark matter interacting with the Standard Model sector through a pseudoscalar portal could evade the direct detection constraints while preserving a WIMP miracle. We study the LHC constraints on the pseudoscalar production in simplified models with the pseudoscalar either dominantly coupled to b quarks or tau leptons and explore their implications for the GeV excesses in gamma ray observations. We also investigate models with new vector-like fermions that could realize the simplified models of pseudoscalar portal dark matter. These models yield new decay channels and signatures of vector-like fermions, for instance, bbb, btautau, and tautautau resonances. Some of the signatures have already been strongly constrained by the existing LHC searches and the parameter space fitting the gamma ray excess is further restricted. On the other hand, the pure tau-rich final state is only weakly constrained so far due to the small electroweak production rate.

18 pages, 7 figures; references added, minor modifications and match the JHEP version

References in corpus (33)

• An Introduction to PYTHIA 8.2
• FeynRules - Feynman rules made easy
• A custodial symmetry for Zbb
• Background model systematics for the Fermi GeV excess
• The Tevatron at the Frontier of Dark Matter Direct Detection
• Search for invisible decays of Higgs bosons in the vector boson fusion and associated ZH production modes
• Indication of Gamma-ray Emission from the Newly Discovered Dwarf Galaxy Reticulum II
• WIMPs at the Galactic Center
• Higgs portal vector dark matter for $\mathrm{GeV}$ scale $\gamma$-ray excess from galactic center
• Not so Coy Dark Matter explains DAMA (and the Galactic Center excess)
• Search for anomalous production of events with three or more leptons in pp collisions at sqrt(s) = 8 TeV
• Galactic Center Gamma-Ray Excess from Dark Matter Annihilation: Is There A Black Hole Spike?
• Search for dark matter in events with heavy quarks and missing transverse momentum in $pp$ collisions with the ATLAS detector
• Fermionic dark matter with pseudo-scalar Yukawa interaction
• Light Neutralino Dark Matter: Direct/Indirect Detection and Collider Searches
• Galactic center $\gamma$-ray excess in hidden sector DM models with dark gauge symmetries: local $Z_3$ symmetry as an example
• Low-mass right-handed sneutrino dark matter: SuperCDMS and LUX constraints and the Galactic Centre gamma-ray excess
• A simplified 2HDM with a scalar dark matter and the galactic center gamma-ray excess
• Beyond the Minimal Top Partner Decay
• On The Gamma-Ray Emission From Reticulum II and Other Dwarf Galaxies
• A description of the Galactic Center excess in the Minimal Supersymmetric Standard Model
• Nonthermal Two Component Dark Matter Model for Fermi-LAT $\gamma$-ray excess and 3.55 keV X-ray Line
• Towards a Supersymmetric Description of the Fermi Galactic Center Excess
• Search for massive supersymmetric particles decaying to many jets using the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV
• Bounds on dark matter interpretation of Fermi-LAT GeV excess
• Constraining Dark Matter Interactions with Pseudoscalar and Scalar Mediators Using Collider Searches for Multi-jets plus Missing Transverse Energy
• Confronting Galactic and Extragalactic $\gamma$-ray observed by Fermi-LAT with Annihilating Dark Matter in Inert Higgs Doublet Model
• $SU(2{)}_X$ Vector DM and Galactic Center Gamma-Ray Excess
• Extending LHC Coverage to Light Pseudoscalar Mediators and Coy Dark Sectors
• Galactic center GeV gamma-ray excess from dark matter with gauged lepton numbers
• Confronting the Galactic Center Gamma Ray Excess With a Light Scalar Dark Matter
• Secluded WIMPs, QED with massive photons, and the galactic center gamma-ray excess
• Non-abelian Dark Matter Solutions for Galactic Gamma-ray Excess and Perseus 3.5 keV X-ray Line

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• The Waning of the WIMP? A Review of Models, Searches, and Constraints
• Toward (Finally!) Ruling Out Z and Higgs Mediated Dark Matter Models
• Dark Matter Interpretation of the Fermi-LAT Observation Toward the Galactic Center
• Pseudoscalar Mediators: A WIMP model at the Neutrino Floor
• Direct Bounds on Heavy Top-Like Quarks With Standard and Exotic Decays
• Minimal renormalizable simplified dark matter model with a pseudoscalar mediator
• Exceptional Composite Dark Matter
• Closing up on Dark Sectors at Colliders: from 14 to 100 TeV
• A Leptonic ALP Portal to the Dark Sector
• Freeze-in production of Fermionic Dark Matter with Pseudo-scalar and Phenomenological Aspects
• Interpretation of the gamma-ray excess and AMS-02 antiprotons: Velocity dependent dark matter annihilations
• The Two Scales of New Physics in Higgs Couplings
• Renormalization group equation analysis of a pseudoscalar portal dark matter model