Decaying Dark Matter in the Supersymmetric Standard Model with Freeze-in and Seesaw mechanims

Abstract

Inspired by the decaying dark matter (DM) which can explain cosmic ray anomalies naturally, we consider the supersymmetric Standard Model with three right-handed neutrinos (RHNs) and R-parity, and introduce a TeV-scale DM sector with two fields ϕ_{1,2} and a $Z_3$ discrete symmetry. The DM sector only interacts with the RHNs via a very heavy field exchange and then we can explain the cosmic ray anomalies. With the second right-handed neutrino N_2 dominant seesaw mechanism at the low scale around 10^4 GeV, we show that ϕ_{1,2} can obtain the vacuum expectation values around the TeV scale, and then the lightest state from ϕ_{1,2} is the decay DM with lifetime around \sim 10^{26}s. In particular, the DM very long lifetime is related to the tiny neutrino masses, and the dominant DM decay channels to μand τare related to the approximate μ-τsymmetry. Furthermore, the correct DM relic density can be obtained via the freeze-in mechanism, the small-scale problem for power spectrum can be solved due to the decays of the R-parity odd meta-stable states in the DM sector, and the baryon asymmetry can be generated via the soft leptogensis.

24 pages,3 figures

References in corpus (19)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Observation of an anomalous positron abundance in the cosmic radiation
• A Theory of Dark Matter
• Leptogenesis
• Measurement of the Cosmic Ray e+ plus e- spectrum from 20 GeV to 1 TeV with the Fermi Large Area Telescope
• Decaying Dark Matter can explain the electron/positron excesses
• PAMELA data and leptonically decaying dark matter
• Minimal Dark Matter predictions for galactic positrons, anti-protons, photons
• Enhancement of Dark Matter Annihilation via Breit-Wigner Resonance
• Flavour-Dependent Leptogenesis with Sequential Dominance
• High Energy Cosmic Rays from the Decay of Gravitino Dark Matter
• Antimatter Signatures of Gravitino Dark Matter Decay
• Double Type-II Seesaw, Baryon Asymmetry and Dark Matter for Cosmic e^\pm Excesses
• ATIC and PAMELA Results on Cosmic e^\pm Excesses and Neutrino Masses
• Type II Seesaw and the PAMELA/ATIC Signals
• Supersymmetric Leptogenesis and the Gravitino Bound
• On Gaugino Contributions to Soft Leptogenesis
• Searching for Smoking Gun Signatures of Decaying Dark Matter
• Resolution to neutrino masses, baryon asymmetry in leptogenesis and cosmic-ray anomalies

Cited by in corpus (5)

• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Light Dark Matter from the U(1)_X Sector in the NMSSM with Gauge Mediation
• Neutrino Portal to FIMP Dark Matter with an Early Matter Era
• T(13) Flavor Symmetry and Decaying Dark Matter
• A Snowmass Whitepaper: Dark Matter Production at Intensity-Frontier Experiments