APEC Seminar (Astronomy - Particle Physics - Experimental Physics - Cosmology)

Speaker: Graciela Gelmini (UCLA)
Title: Halo independent direct dark matter detection data analysis from convex hulls
Date (JST): Fri, Nov 15, 2019, 13:30 - 14:30
Place: Seminar Room A
Related File: 2387.pdf
Abstract: Non-directional direct detection (DD) experiments attempt to detect dark matter (DM) particles through the energy they deposit in collisions with nuclei within a detector. I will show how DD data can be translated into predictions of the DM local velocity distribution, allowing to compare different DD data sets through these predictions (in a “halo-independent” analysis complementary to the usual ``halo-dependent" method, which requires assuming a model for DM halo). I will explain how the halo independent method is put on firm mathematical grounds by using the Fenchel-Eggleston theorem for convex hulls (an extension of the Caratheodory theorem). The seminar will not assume any previous knowledge of convex geometry in the audience.