2000/12/31 by Anne M. Green, Anne M Green · 34 citations
Physics and Astronomy · #Astrophysics #Computational physics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Event (particle physics) #Galaxies: Formation, Evolution, Phenomena #Halo #Massive particle #Nuclear physics #Particle (ecology) #Particle physics #Physics #Recoil #Scalar field dark matter #WIMP #Weakly interacting massive particles #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.63.103003
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 63(10) (American Physical Society) · 6 pages, 3 figures. Version to appear in Phys. Rev. D. Comparsion with DAMA annual modulation data replaced with qualitative discussion
arxiv created 2001/03/09 · openalex publication_date 2001/04/25 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Weakly interacting massive particle (WIMP) direct detection event rate calculations usually rely on fairly simple, essentially static, analytic halo models. This is largely since the resolution of numerical simulations is not yet large enough to allow the full numerical calculation of the WIMP density and velocity distribution. In this paper we study the direct detection rate, in particular its energy dependence and annual modulation, for the caustic ring halo model. In this model, which uses simple assumptions to model the infall of dark matter onto the halo, the distribution of the cold dark matter particles at the Earth's location has a series of peaks in velocity space. We find that the recoil energy spectrum contains distinctive steps and the sign of the annual modulation in the event rate changes as a function of recoil energy. These effects provide a potentially distinctive experimental signal.