TY - JOUR
T1 - Probing dark matter self-interaction in the Sun with IceCube-PINGU
AU - Chen, Chian Shu
AU - Lee, Fei Fan
AU - Lin, Guey Lin
AU - Lin, Yen Hsun
N1 - Funding Information:
We thank S. Palomares-Ruiz for a very useful comment. CSC is supported by the National Center for Theoretical Sciences, Taiwan; FFL, GLL, and YHL are supported by Ministry of Science and Technology, Taiwan under Grant No. 102-2112-M-009-017.
PY - 2014/10/1
Y1 - 2014/10/1
N2 - 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.
AB - 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.
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U2 - 10.1088/1475-7516/2014/10/049
DO - 10.1088/1475-7516/2014/10/049
M3 - Article
AN - SCOPUS:84908658917
VL - 2014
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 10
M1 - 049
ER -