Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-10-13
Phys.Rev.D57:3256-3263,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, LaTeX
Scientific paper
10.1103/PhysRevD.57.3256
Rates for detection of weakly-interacting massive-particle (WIMP) dark matter are usually carried out assuming the Milky Way halo is an isothermal sphere. However, it is possible that our halo is not precisely spherical; it may have some bulk rotation; and the radial profile may differ from that of an isothermal sphere. In this paper, we calculate detection rates in observationally consistent alternative halo models that produce the same halo contributions to the local and asymptotic rotation speeds to investigate the effects of theoretical uncertainty of the WIMP spatial and velocity distribution. We use self-consistent models to take into account the effects of various mass distributions on the local velocity distribution. The local halo density may be increased up to a factor of 2 by flattening or by an alternative radial profile (which may also decrease the density slightly). However, changes in the WIMP velocity distribution in these models produce only negligible changes in the WIMP detection rate. Reasonable bulk rotations lead to only an $O(10%)$ effect on event rates. We also show how the nuclear recoil spectrum in a direct-detection experiment could provide information on the shape and rotation of the halo.
Kamionkowski Marc
Kinkhabwala Ali
No associations
LandOfFree
Galactic Halo Models and Particle Dark-Matter Detection does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Galactic Halo Models and Particle Dark-Matter Detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Galactic Halo Models and Particle Dark-Matter Detection will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-258059