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arXiv:0711.4895 (astro-ph)
[Submitted on 30 Nov 2007]

Title:The impact of going beyond the Maxwell distribution in direct dark matter detection rates

Authors:J. D. Vergados, S. H. Hansen, O. Host
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Abstract: We consider direct dark matter detection rates and investigate the difference between a standard Maxwell-Boltzmann velocity distribution and a "realistic" distribution like the ones extracted from numerical N-body simulations. Sizable differences are observed when such results are compared to the standard Maxwell-Boltzmann distribution. For a light target both the total rate and the annual modulation are reduced by ~25%. For a heavy target the total rate is virtually unchanged, whereas the annual modulation is modified by up to 50%, depending on the WIMP mass and detector energy threshold. We also consider the effect of a possible velocity anisotropy, and the effect is found to be largest for a light target For the realistic velocity distribution the anisotropy may reduce the annual modulation, in contrast to the Maxwell-Boltzmann case.
Comments: 13 pages, 10 figures, accepted by Phys. Rev. D
Subjects: Astrophysics (astro-ph); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:0711.4895 [astro-ph]
  (or arXiv:0711.4895v1 [astro-ph] for this version)
  https://doi.org/10.48550/arXiv.0711.4895
Journal reference: Phys.Rev.D77:023509,2008
Related DOI: https://doi.org/10.1103/PhysRevD.77.023509

Submission history

From: Ole Host [view email]
[v1] Fri, 30 Nov 2007 10:08:57 UTC (55 KB)
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