Search for light WIMP captured in the Sun using contained events in Super-Kamiokande

THE SUPER-KAMIOKANDE COLLABORATION

研究成果: Conference contribution

抜粋

Super-Kamiokande can search for dark matter by detecting neutrinos and muons which are produced by WIMP pair annihilations occur inside the Sun. The huge gravity and hydrogen-rich composition of the Sun combined with high sensitivity of Super-Kamiokande for low energy(few GeV) neutrinos allow us good sensitivity to light(few GeV to few 10 GeV) WIMP dark matter, especially for spin-dependent coupling case. In this analysis, we increased signal acceptance by using fully-contained and partially-contained neutrino events added to up-going muons in Super-Kamiokande. We also used minimum χ2 method to use energy, direction and flavor informations. We fitted Super-Kamiokande I-IV data to find the allowed contribution of WIMP-induced neutrino events added to large back-ground of atmospheric neutrino events. As a result, we found no signal observed and the null result was interpreted as upper limit on the spin-dependent (SD) WIMP-proton elastic scattering cross-section for χχ → bb¯ and χχ → τ+τ WIMP annihilation channels. We set current best limit for WIMP mass below 100 GeV.

元の言語English
ホスト出版物のタイトルProceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
出版者Sociedade Brasileira de Fisica
ISBN(電子版)9788589064293
出版物ステータスPublished - 2013 1 1
イベント33rd International Cosmic Rays Conference, ICRC 2013 - Rio de Janeiro, Brazil
継続期間: 2013 7 22013 7 9

出版物シリーズ

名前Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013
2013-October

Conference

Conference33rd International Cosmic Rays Conference, ICRC 2013
Brazil
Rio de Janeiro
期間13/7/213/7/9

    フィンガープリント

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

これを引用

THE SUPER-KAMIOKANDE COLLABORATION (2013). Search for light WIMP captured in the Sun using contained events in Super-Kamiokande. : Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013 (Proceedings of the 33rd International Cosmic Rays Conference, ICRC 2013; 巻数 2013-October). Sociedade Brasileira de Fisica.