Probing dark matter self-interaction in the Sun with IceCube-PINGU

Chian Shu Chen, Fei Fan Lee, Guey Lin Lin, Yen Hsun Lin

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

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 χχτ+τ-, ν as examples. The PINGU sensitivities to DM self-interaction cross section σχχ are estimated for track and cascade events.

Original languageEnglish
Article number049
JournalJournal of Cosmology and Astroparticle Physics
Volume2014
Issue number10
DOIs
Publication statusPublished - 2014 Oct 1

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics

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