A Study of Dirac Fermionic Dark Matters

Abstract

We study pure weak eigenstate Dirac fermionic dark matters (DM). We consider WIMP with renormalizable interaction. According to results of direct searches and the nature of DM (electrical neutral and being a pure weak eigenstate), the quantum number of DM is determined to be $I_3=Y=0$. There are only two possible cases: either DM has non-vanishing weak isospin ($I\ne 0$) or it is an isosinglet (I=0). In the first case, the Sommerfeld enhancement is sizable for large $I$, producing large ${\chi }^0\overline{{\chi }^0}\to VV$ rates. In particular, we obtain large $\chi \bar{\chi }\to W^{+}{W}^{-}$ cross section, which is comparable to the latest bounds from indirect searches and $m_{\chi }$ is constrained to be larger than few hundred GeV to few TeV. It is possible to give correct relic density with $m_{\chi }$ higher than these lower bounds. In the second case, to couple DM to standard model (SM) particles, a SM-singlet vector mediator $X$ is required from renormalizability and the SM gauge quantum numbers. To satisfy the latest bounds of direct searches and to reproduce the DM relic density at the same time, resonant enhancement in DM annihilation diagram is needed. Thus, the masses of DM and the mediator are related. Furthermore, this model is not sufficient to explain the deviation in muon $g-2$.

17 pages, 6 figures, version to appear in Phys. Rev. D

References in corpus (29)

• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• Supersymmetric Dark Matter
• Planck 2013 results. I. Overview of products and scientific results
• A Theory of Dark Matter
• Dark Matter Results from 225 Live Days of XENON100 Data
• Minimal Dark Matter
• Gauge Singlet Scalars as Cold Dark Matter
• The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
• Dark Matter Results from 100 Live Days of XENON100 Data
• Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
• Sommerfeld Enhancements for Thermal Relic Dark Matter
• Sommerfeld factor for arbitrary partial wave processes
• Vacuum Stability, Perturbativity, and Scalar Singlet Dark Matter
• Minimal Dark Matter: model and results
• The Sommerfeld enhancement for dark matter with an excited state
• Constraints on Scalar Dark Matter from Direct Experimental Searches
• Singlet fermionic dark matter
• Hidden fermion as milli-charged dark matter in Stueckelberg Z' model
• Multi-Scalar-Singlet Extension of the Standard Model - the Case for Dark Matter and an Invisible Higgs Boson
• Multicomponent Dark Matter in Supersymmetric Hidden Sector Extensions
• Global Study of the Simplest Scalar Phantom Dark Matter Model
• Sommerfeld corrections to type-II and III leptogenesis
• Dark Matter and Dark Forces from a supersymmetric hidden sector
• Constraints on Electron-quark Contact Interactions and Implications to models of leptoquarks and Extra Z Bosons
• Mini--Review of Dark Matter: 2012
• Rescattering effects in charmless B_{u,d,s} to P P decays
• Effective degrees of freedom during the radiation era
• Simple fermionic dark matter models and Higgs boson couplings
• Dark Matter Mass Constrained by the Relic Abundance, Direct Detections, and Colliders

Cited by in corpus (6)

• Collider Probes of Real Triplet Scalar Dark Matter
• SKA-Phase 1 sensitivity for synchrotron radio emission from multi-TeV Dark Matter candidates
• Majorana Dark Matter in Minimal Higgs Portal Models after LUX
• Study of Majorana Fermionic Dark Matter
• Confronting Dirac Fermionic Dark Matter with Recent Data
• Neutrino production in the central dark-matter spikes of active galaxies