8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

Daily Modulation of the Dark Matter Signal in Crystalline Detectors

Aug 12, 2011, 9:40 AM
556 (Rhode Island Convention Center)


Rhode Island Convention Center

Parallel contribution Particle Astrophysics and Cosmology Particle Astrophysics and Cosmology


Ms Nassim Bozorgnia (UCLA)


The channeling effect in crystals refers to the orientation dependence of charged ion penetration in crystals. In direct dark matter crystalline detectors, a channeled ion recoiling after a collision with a WIMP gives all its energy to electrons. Thus channeling increases the ionization or scintillation signal expected from a WIMP. Channeling is a directional effect which depends on the velocity distribution of WIMPs in the dark halo of our Galaxy and could lead to a daily modulation of the signal. I will present estimates of the expected amplitude of the daily modulation in direct dark matter detectors, both due to channeling and just due to the rotational velocity of the Earth around itself.

Primary author


Prof. Graciela Gelmini (UCLA) Prof. Paolo Gondolo (University of Utah)

Presentation materials