A Reappraisal on Dark Matter Co-annihilating with a Top/Bottom Partner

Abstract

We revisit the calculation of relic density of dark matter particles co-annihilating with a top or bottom partner, by properly including the QCD bound-states (onia) effects of the colored partners, as well as the relevant electroweak processes which become important in the low mass region. We carefully set up the complete framework that incorporates the relevant contributions and investigate their effects on the cosmologically preferred mass spectrum, which turn out to be comparable in size to those coming from the Sommerfeld enhancement. We apply the calculation to three scenarios: bino-stop and bino-sbottom co-annihilations in supersymmetry, and a vector dark matter co-annihilating with a fermionic top partner. In addition, we confront our analysis of the relic abundance with recent direct detection experiments and collider searches at the LHC, which have important implications in the bino-stop and bino-sbottom scenarios. In particular, in the bino-stop case recent LHC limits have excluded regions of parameter with a direct detection rate that is above the neutrino floor.

22 pages, 7 figures. v2: updated with the 2017 Moriond results; included non-abelian interaction contribution to bound state formation; conclusion not changed; more references added

References in corpus (16)

• A Theory of Dark Matter
• Results from a search for dark matter in the complete LUX exposure
• Cosmology and Astrophysics of Minimal Dark Matter
• Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
• Charmonium
• Bound-state formation for thermal relic dark matter and unitarity
• Cosmological Implications of Dark Matter Bound States
• Gluon contribution to the dark matter direct detection
• Dark Matter's secret liaisons: phenomenology of a dark U(1) sector with bound states
• Dark-matter bound states from Feynman diagrams
• Anatomy of Coannihilation with a Scalar Top Partner
• Asymmetric thermal-relic dark matter: Sommerfeld-enhanced freeze-out, annihilation signals and unitarity bounds
• Effects of QCD bound states on dark matter relic abundance
• Probing Colored Particles with Photons, Leptons, and Jets
• Simplified Phenomenology for Colored Dark Sectors
• New LUX result compensates LHC searches for exotic quarks

Cited by in corpus (21)

• Coannihilation without chemical equilibrium
• Top-philic dark matter within and beyond the WIMP paradigm
• Unveiling Hidden Physics at the LHC
• Higgs Enhancement for the Dark Matter Relic Density
• Coloured coannihilations: Dark matter phenomenology meets non-relativistic EFTs
• Stop Coannihilation in the CMSSM and SubGUT Models
• Higgs-mediated bound states in dark-matter models
• Search for single production of the vector-like top partner at the 14 TeV LHC
• Dark Matter Bound State Formation in Fermionic $Z_2$ DM model with Light Dark Photon and Dark Higgs Boson
• Bound-state effects for dark matter with Higgs-like mediators
• How Heavy can Neutralino Dark Matter be?
• Collider Signatures of Coannihilating Dark Matter in Light of the B-Physics Anomalies
• Radiative corrections to vectorlike portal dark matter
• Stop Co-Annihilation in the Minimal Supersymmetric Standard Model Revisited
• Studies of a thermally averaged p-wave Sommerfeld factor
• Non-relativistic susceptibility and a dark matter application
• A Study of Dark Matter and QCD-Charged Mediators in the Quasi-Degenerate Regime
• Exploring Uncharted Soft Displaced Vertices in Open Data
• Two-component asymmetric dark matter via bound states and freeze-in decay
• Baryogenesis via relativistic bubble expansion
• $CP$ violating mode of the stoponium decay into $Zh$