The halo dark matter (DM) can be gravitationally captured by the Sun. For self-interacting DM (SIDM), we show that the number of DM trapped inside the Sun remains unsuppressed even if the DM-nucleon cross section is negligible. We consider a SIDM model where U(1) gauge symmetry is introduced to account for the DM self-interaction. Such a model naturally leads to isospin violation for DM-nucleon interaction, although isospin symmetry is still allowed as a special case. We show that the indirect detection of DM-induced neutrinos from the Sun can probe those SIDM parameter ranges not yet reachable by direct detections. Those parameter ranges are either the region with a very small dark matter mass (less than a few GeV) or the region opened up due to isospin violations.
|State||Published - May 2015|
|Event||13th Flavor Physics and CP Violation, FPCP 2015 - Nagoya, Japan|
Duration: 25 May 2015 → 29 May 2015
|Conference||13th Flavor Physics and CP Violation, FPCP 2015|
|Period||25/05/15 → 29/05/15|