2006/09/09 by N. Tetradis, J. D. Vergados, Amand Faessler · 19 citations
Physics and Astronomy · #Astrophysics #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Dark matter halo #Galaxy #Halo #Light dark matter #Particle physics #Particle physics theoretical and experimental studies #Physics #Scalar field dark matter #WIMP #Weakly interacting massive particles #hep-ph
paper · pdf · doi:10.1103/physrevd.75.023504
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 75(2) (American Physical Society) · 16 pages, 7 figures
arxiv created 2006/09/09 · openalex publication_date 2007/01/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the effect of a coupling between dark matter and dark energy on the rates for the direct detection of dark matter. The magnitude of the effect depends on the strength \ensuremathκ of this new interaction relative to gravity. The resulting isothermal velocity distribution for dark matter in galaxy halos is still Maxwell-Boltzmann (M-B), but the characteristic velocity and the escape velocity are increased by √1+\ensuremathκ2. We adopt a phenomenological approach and consider values of \ensuremathκ near unity. For such values we find that: (i) The (time averaged) event rate increases for light WIMPs, while it is somewhat reduced for WIMP masses larger than 100 GeV. (ii) The time dependence of the rate arising from the modulation amplitude is decreased compared to the standard M-B velocity distribution. (iii) The average and maximum WIMP energy increase proportionally to 1+\ensuremathκ2, which, for sufficiently massive WIMPs, allows the possibility of designing experiments measuring \ensuremathγ rays following nuclear de-excitation.