標題: Probing dark matter self-interaction in the Sun with IceCube-PINGU
作者: Chen, Chian-Shu
Lee, Fei-Fan
Lin, Guey-Lin
Lin, Yen-Hsun
物理研究所
Institute of Physics
關鍵字: dark matter theory;neutrino detectors
公開日期: 1-十月-2014
摘要: 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 similar to 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 chi chi -> tau(+)tau(-), nu(nu) over bar as examples. The PINGU sensitivities to DM self-interaction cross section sigma(chi chi) are estimated for track and cascade events.
URI: http://dx.doi.org/10.1088/1475-7516/2014/10/049
http://hdl.handle.net/11536/124150
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2014/10/049
期刊: JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
Issue: 10
顯示於類別:期刊論文


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  1. 000345990800050.pdf