Partial wave treatment of Supersymmetric Dark Matter in the presence of CP - violation

Abstract

We present an improved partial wave analysis of the dominant LSP annihilation channel to a fermion-antifermion pair which avoids the non-relativistic expansion being therefore applicable near thresholds and poles. The method we develop allows of contributions of any partial wave in the total angular momentum J in contrast to partial wave analyses in terms of the orbital angular momentum L of the initial state, which is usually truncated to p-waves, and yields very accurate results. The method is formulated in such a way as to allow easy handling of CP-violating phases residing in supersymmetric parameters. We apply this refined partial wave technique in order to calculate the neutralino relic density in the constrained MSSM (CMSSM) in the presence of CP-violating terms occurring in the Higgs - mixing parameter μand trilinear A coupling for large tanb. The inclusion of CP-violating phases in mu and A does not upset significantly the picture and the annihilation of the LSP's to a b b_bar, through Higgs exchange, is still the dominant mechanism in obtaining cosmologically acceptable neutralino relic densities in regions far from the stau-coannihilation and the `focus point'. Significant changes can occur if we allow for phases in the gaugino masses and in particular the gluino mass.

23 pages LaTeX, 10 eps figures, version to appear in PRD

References in corpus (16)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Supersymmetric Dark Matter in Light of WMAP
• Dark Matter Detection in the Light of Recent Experimental Results
• WMAP Constraints, SUSY Dark Matter and Implications for the Direct Detection of SUSY
• WMAPing out Supersymmetric Dark Matter and Phenomenology
• Chi**2 analysis of the minimal supergravity model including WMAP, g(mu)-2 and b -> s gamma constraints
• Updated Constraints on the Minimal Supergravity Model
• Electric Dipole Moments in the MSSM at Large tan(beta)
• Accurate relic densities with neutralino, chargino and sfermion coannihilations in mSUGRA
• Probing CP Violation with the Deuteron Electric Dipole Moment
• WMAPing the Universe: Supersymmetry, Dark Matter, Dark Energy, Proton Decay and Collider Physics
• Dark Matter, Muon g-2 and Other SUSY Constraints
• Sensitivity of Supersymmetric Dark Matter to the b Quark Mass
• Relic density and elastic scattering cross sections of the neutralino in the MSSM with CP-violating phases
• Interpreting the New Brookhaven g_mu - 2 Result
• micrOMEGAs: recent developments

Cited by in corpus (8)

• Dark Matter, Light Stops and Electroweak Baryogenesis
• The Supersymmetric Origin of Matter
• WMAP Dark Matter Constraints and Yukawa Unification in SUGRA models with CP Phases
• Relic density of neutralino dark matter in the MSSM with CP violation
• CP violation in SUSY
• Refining the predictions of supersymmetric CP-violating models: A top-down approach
• Suppression of the neutralino relic density with supersymmetric CP violation
• Upper limits on sparticle masses from WMAP dark matter constraints with modular invariant soft breaking