Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-06-16
The Astrophysical Journal, 746:107 (14pp), 2012
Physics
High Energy Physics
High Energy Physics - Phenomenology
11 pages, 17 figures
Scientific paper
10.1088/0004-637X/746/1/107
Direction sensitive direct detection of Weakly Interacting Massive Particles (WIMPs) as dark matter would provide an unambiguous non-gravitational signature of dark matter (DM). The diurnal variation of DM signal due to earth's rotation around its own axis can be a significant signature for galactic WIMPs. Because of particular orientation of earth's axis of rotation with respect to WIMP wind direction, the apparent direction of WIMP wind as observed at a detector can alter widely over a day. In this work we calculate the directional detection rates with their daily and yearly modulations in earth-bound dark matter experiments considering detailed features of the geometry and dynamics of the earth-sun system along with the solar motion in galactic frame. A separate halo model namely the dark disc model other than the usual standard halo model for dark matter halo is also considered and the results for two models are compared. We demonstrate the results for two types of gas detectors namely DRIFT (target material CS2) and NEWAGE (target material CF4) that use Time Projection Chamber techniques for measuring directionality of the recoil nucleus. The WIMP mass and recoil energy dependence of the daily variation of event rates are computed for specific detector and the sensitive ranges of mass and recoil energies for the considered detector are probed.
Bandyopadhyay Abhijit
Majumdar Debasish
No associations
LandOfFree
On Diurnal and Annual Variations of Directional Detection Rates of Dark Matter 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 On Diurnal and Annual Variations of Directional Detection Rates of Dark Matter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On Diurnal and Annual Variations of Directional Detection Rates of Dark Matter will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-100751