Zooming in on light relic neutralinos by direct detection and measurements of galactic antimatter

Abstract

The DAMA Collaboration has recently analyzed its data of the extensive WIMP direct search (DAMA/NaI) which detected an annual modulation, by taking into account the channelling effect which occurs when an ion traverses a detector with a crystalline structure. Among possible implications, this Collaboration has considered the case of a coherent WIMP-nucleus interaction and then derived the form of the annual modulation region in the plane of the WIMP-nucleon cross section versus the WIMP mass, using a specific modelling for the channelling effect. In the present paper we first show that light neutralinos fit the annual modulation region also when channelling is taken into account. To discuss the connection with indirect signals consisting in galactic antimatter, in our analysis we pick up a specific galactic model, the cored isothermal-sphere. In this scheme we determine the sets of supersymmetric models selected by the annual modulation regions and then prove that these sets are compatible with the available data on galactic antiprotons. We comment on implications when other galactic distribution functions are employed. Finally, we show that future measurements on galactic antiprotons and antideuterons will be able to shed further light on the populations of light neutralinos singled out by the annual modulation data.

9 pages, 5 figures. A few comments and references added

References in corpus (6)

• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• On electromagnetic contributions in WIMP quests
• Investigating halo substructures with annual modulation signature
• The Hadronic Light-by-Light Contribution to the Muon Anomalous Magnetic Moment: Where do we stand?
• Search for pair production of scalar bottom quarks in ppbar collisions at sqrt(s)=1.96 TeV
• Search for Bs --> mu+ mu- at D0

Cited by in corpus (17)

• Dark Matter Candidates from Particle Physics and Methods of Detection
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Asymmetric Dark Matter
• Investigating electron interacting dark matter
• Interpreting the recent results on direct search for dark matter particles in terms of relic neutralino
• Antideuteron fluxes from dark matter annihilation in diffusion models
• The Inert Doublet Model and Inelastic Dark Matter
• The New DAMA Dark-Matter Window and Energetic-Neutrino Searches
• Using the Energy Spectrum at DAMA/LIBRA to Probe Light Dark Matter
• Discussing direct search of dark matter particles in the Minimal Supersymmetric extension of the Standard Model with light neutralinos
• Light Neutralinos with Large Scattering Cross Sections in the Minimal Supersymmetric Standard Model
• Hunting the lightest lightest neutralinos
• TASI 2008 Lectures on Dark Matter
• Light mixed sneutrinos as thermal dark matter
• Light neutralinos at LHC in cosmologically-inspired scenarios: new benchmarks in the search for supersymmetry
• Measuring a Light Neutralino Mass at the ILC: Testing the MSSM Neutralino Cold Dark Matter Model
• Some Aspects of New CDM Models and CDM Detection Methods