2014/12/21 by Chian-Shu Chen, Fei-Fan Lee, Chen, Chian-Shu +5
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Scientific Research and Discoveries
paper · pdf · doi:10.48550/arxiv.1412.6739
openalex publication_date 2014/12/21 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
We study the capture, annihilation and evaporation of dark matter (DM) inside the Sun. It has been shown that the DM self-interaction can increase the DM number inside the Sun. We demonstrate that this enhancement becomes more significant in the regime of small DM mass, given a fixed DM self-interaction cross section. This leads to the enhancement of neutrino flux from DM annihilation. On the other hand, for DM mass as low as as a few GeVs, not only the DM-nuclei scatterings can cause the DM evaporation, DM self-interaction also provides non-negligible contributions to this effect. Consequently, the critical mass for DM evaporation (typically 3 ~ 4 GeV without the DM self-interaction) can be slightly increased. We discuss the prospect of detecting DM self-interaction in IceCube- PINGU using the annihilation channels χχ→νν, τ-τ+ as examples. The PINGU sensitivities to DM self-interaction cross section σχχ are estimated for track and cascade events.