Heavy Right-Handed Neutrinos and Dark Matter in the $\nu$CMSSM

Abstract

We perform a systematic study of the effects of the type-I seesaw mechanism on the dark matter abundance in the constrained supersymmetric standard model (CMSSM) which includes three right-handed neutrinos (the $\nu$CMSSM). For large values of $m_0,m_{1/2}$, we exploit the effects of large neutrino Yukawa couplings on the renormalization group (RG) evolution of the up-type Higgs. In particular, we show that the focus point scale can greatly exceed the electroweak scale resulting in the absence of a focus point region for which the relic density of neutralinos is within the range determined by WMAP. We also discuss the effects of the right-handed neutrinos on the so-called funnel region, where the relic density is controlled by s-channel annihilations through a heavy Higgs. For small values of $m_0,m_{1/2}$, we discuss the possibility of sneutrino coannihilation regions with an emphasis on the suppression of the left-handed slepton doublet masses due to the neutrino Yukawa coupling. We consider two types of toy models consistent with either the normal or inverted hierarchy of neutrino masses.

18 pages, 7 figures, references and a footnote added, typos corrected

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Cited by in corpus (17)

• Supersymmetry Breaking due to Moduli Stabilization in String Theory
• Lepton Flavor Violations in High-Scale SUSY with Right-Handed Neutrinos
• What if Supersymmetry Breaking Unifies beyond the GUT Scale?
• SUSEFLAV: program for supersymmetric mass spectra with seesaw mechanism and rare lepton flavor violating decays
• Constrained Supersymmetric Flipped SU(5) GUT Phenomenology
• Effects of Large Threshold Corrections in Supersymmetric Type-I Seesaw Model
• Examining leptogenesis with lepton flavor violation and the dark matter abundance
• Supersymmetric mass spectra and the seesaw scale
• Revisiting Flavor and CP Violation in Supersymmetric SU(5) with Right-Handed Neutrinos
• Focus Point Assisted by Right-Handed Neutrinos
• Cold Dark Matter and Higgs Mass in the Constrained Minimal Supersymmetric Standard Model with Generalized Yukawa Quasi-Unification
• Precise focus point scenario for a natural Higgs boson in the MSSM
• Threshold corrections to the radiative breaking of electroweak symmetry and neutralino dark matter in supersymmetric seesaw model
• Enhanced Tau Lepton Signatures at LHC in Constrained Supersymmetric Seesaw
• Constraining Affleck-Dine Leptogenesis after Thermal Inflation
• Shifted focus point of the Higgs mass parameter from the minimal mixed mediation of SUSY breaking
• Naturalness-guided Gluino Mass Bound from the Minimal Mixed Mediation of SUSY Breaking