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Is a co-rotating Dark Disk a threat to Dark Matter Directional Detection ?

Abstract : Recent N-Body simulations are in favor of the presence of a co-rotating Dark Disk that might contribute significantly (10%-50%) to the local Dark Matter density. Such substructure could have dramatic effect on directional detection. Indeed, in the case of a null lag velocity, one expects an isotropic WIMP velocity distribution arising from the Dark Disk contribution, which might weaken the strong angular signature expected in directional detection. For a wide range of Dark Disk parameters, we evaluate in this Letter the effect of such dark component on the discovery potential of upcoming directional detectors. As a conclusion of our study, using only the angular distribution of nuclear recoils, we show that Dark Disk models as suggested by recent N-Body simulations will not affect significantly the Dark Matter reach of directional detection, even in extreme configurations.
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http://hal.in2p3.fr/in2p3-00714579
Contributor : Emmanuelle Vernay <>
Submitted on : Thursday, July 5, 2012 - 9:49:08 AM
Last modification on : Thursday, November 19, 2020 - 12:58:40 PM

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J. Billard, Q. Riffard, F. Mayet, D. Santos. Is a co-rotating Dark Disk a threat to Dark Matter Directional Detection ?. Physics Letters B, Elsevier, 2013, 718, pp.1171-1175. ⟨10.1016/j.physletb.2012.12.037⟩. ⟨in2p3-00714579⟩

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