The modulation effect for supersymmetric dark matter detection with asymmetric velocity dispersion

Abstract

The detection of the theoretically expected dark matter is central to particle physics cosmology. Current fashionable supersymmetric models provide a natural dark matter candidate which is the lightest supersymmetric particle (LSP). Such models combined with fairly well understood physics like the quark substructure of the nucleon and the nuclear form factor and the spin response function of the nucleus, permit the evaluation of the event rate for LSP-nucleus elastic scattering. The thus obtained event rates are, however, very low or even undetectable. So it is imperative to exploit the modulation effect, i.e. the dependence of the event rate on the earth's annual motion. In this review we study such a modulation effect in directional and undirectional experiments. We calculate both the differential and the total rates using symmetric as well as asymmetric velocity distributions. We find that in the symmetric case the modulation amplitude is small, less than 0.07. There exist, however, regions of the phase space and experimental conditions such that the effect can become larger. The inclusion of asymmetry, with a realistic enhanced velocity dispersion in the galactocentric direction, yields the bonus of an enhanced modulation effect, with an amplitude which for certain parameters can become as large as 0.46.

35 LATEX pages, 7 Tables, 8 PostScript Figures included

References in corpus (1)

• Cosmological Parameters

Cited by in corpus (27)

• Inelastic Dark Matter
• Effect of the galactic halo modeling on the DAMA/NaI annual modulation result: an extended analysis of the data for WIMPs with a purely spin-independent coupling
• Probing the supersymmetric parameter space by WIMP direct detection
• Effect of halo modelling on WIMP exclusion limits
• Astrophysical uncertainties on the local dark matter distribution and direct detection experiments
• Effect of realistic astrophysical inputs on the phase and shape of the WIMP annual modulation signal
• Dependence of direct detection signals on the WIMP velocity distribution
• Physics Potential and Prospects for the CUORICINO and CUORE Experiments
• Determining the WIMP mass using direct detection experiments
• Cold Dark Matter detection in SUSY models at large tan(beta)
• The impact of going beyond the Maxwell distribution in direct dark matter detection rates
• The WIMP annual modulation signal and non-standard halo models
• Can Solar Neutrinos be a Serious Background in Direct Dark Matter Searches?
• Theoretical Directional and Modulated Rates for Direct SUSY Dark Matter Detection
• Update of the direct detection of dark matter and the role of the nuclear spin
• Searching for Supersymmetric Dark Matter - The Directional Rate and the Modulation Effect Due to Caustic Rings
• A potential WIMP signature for the caustic ring halo model
• On The Direct Detection of Dark Matter- Exploring all the signatures of the neutralino-nucleus interaction
• Implications of a possible 115 GeV supersymmetric Higgs boson on detection and cosmological abundance of relic neutralinos
• Direct Detection Rates of Dark Matter Coupled to Dark Energy
• Direct Dark Matter Detection with Velocity Distribution in the Eddington approach
• A scheme for the extraction of WIMP-nucleon scattering cross sections from total event rates
• The temperature of hot gas in galaxies and clusters: baryons dancing to the tune of dark matter
• SUSY Dark Matter in the Universe- Theoretical Direct Detection Rates
• Searching for Dark Matter- Theoretical Rates and Exclusion Plots due to the Spin
• Halo Density Profiles Consistent with Asymmetric M-B Velocity Distributions-Implications on Direct Dark Matter Searches
• New Velocity Distribution in the Context of the Eddington Theory