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    題名: 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
    關鍵詞: dark matter theory;neutrino detectors
    日期: 2014-10-17
    上傳時間: 2016-11-12 02:10:58 (UTC+8)
    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 ~ 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 → τ+τ-, νbar nu as examples. The PINGU sensitivities to DM self-interaction cross section σχχ are estimated for track and cascade events.
    關聯: Journal of Cosmology and Astroparticle Physics 1410(2014)10,049
    DOI: 10.1088/1475-7516/2014/10/049
    顯示於類別:[物理學系暨研究所] 期刊論文


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