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

Published

Conference Paper

© 2013 Sociedade Brasileira de Fisica. All Rights Reserved. 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 χ 2 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.

Duke Authors

Cited Authors

  • Choi, K; Abe, K; Haga, Y; Hayato, Y; Iyogi, K; Kameda, J; Kishimoto, Y; Miura, M; Moriyama, S; Nakahata, M; Nakano, Y; Nakayama, S; Sekiya, H; Shiozawa, M; Suzuki, Y; Takeda, A; Tomura, T; Wendell, RA; Irvine, T; Kajita, T; Kametani, I; Kaneyuki, K; Lee, KP; Nishimura, Y; Okumura, K; McLachlan, T; Labarga, L; Kearns, E; Raaf, JL; Stone, JL; Sulak, LR; Berkman, S; Tanaka, HA; Tobayama, S; Goldhaber, M; Carminati, G; Kropp, WR; Mine, S; Renshaw, A; Smy, MB; Sobel, HW; Ganezer, KS; Hill, J; Hong, N; Kim, JY; Lim, IT; Akiri, T; Himmel, A; Scholberg, K; Walter, CW; Wongjirad, T; Ishizuka, T; Tasaka, S; Jang, JS; Learned, JG; Matsuno, S; Smith, SN; Hasegawa, T; Ishida, T; Ishii, T; Kobayashi, T; Nakadaira, T; Nakamura, K; Oyama, Y; Sakashita, K; Sekiguchi, T; Tsukamoto, T; Suzuki, AT; Takeuchi, Y; Bronner, C; Hirota, S; Huang, K; Ieki, K; Ikeda, M; Kikawa, H; Minamino, A; Nakaya, T

Published Date

  • January 1, 2013

Published In

  • Proceedings of the 33rd International Cosmic Rays Conference, Icrc 2013

Volume / Issue

  • 2013-October /

International Standard Book Number 13 (ISBN-13)

  • 9788589064293

Citation Source

  • Scopus