2024-03-28T13:13:56Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00013009
2023-01-16T03:59:53Z
336:635:636
Super-Kamiokandeにおける上向きミューオン事象を用いた太陽及び地球方向WIMP間接探索
An indirect search for WIMPs in the Sun and the Earth using upward-going muon events in Super-Kamiokande
Tanaka, Takayuki
40887
田中, 隆之
40888
名古屋大学
Nagoya University
博士(理学)
We present the result of an indirect search for high energy neutrinos from WIMP annihilation in the Sun and in the Earth using upward-going muon events at Super-Kamiokande. Datasets from SKI-SKIII (3109.6 days) were used for the analysis. We looked for excesses of neutrino signal from the Sun and the Earth as compared with the expected atmospheric neutrino background in three types of upward-going muon categories: stopping, nonshowering, and showering. No significant excess was observed. The 90% C.L. upper limits of upward-going muon flux induced by WIMPs of 100 GeV/c2 which annihilate in the Sun were 2.1 ×10^3 km^−2 y^−1 and 1.3 ×10^3 km^−2 y^−1 for the soft and hard annihilation channels, respectively. Those of the Earth were 1.1 ×10^3 km^−2 y^−1 and 9.0 ×10^2 km^−2 y^−1 for the soft and hard annihilation channels, respectively. The flux limits from the Sun correspond to upper limits of 4.5 ×10^−3 pb and 2.7 ×10^−4 pb for spin-dependent WIMP-nucleon scattering cross sections in the soft and hard annihilation channels, respectively. Those from the Earth correspond to upper limits of 8.1×10^−6 pb and 7.0 ×10^−7 pb for spin-independent WIMP-nucleon scattering cross sections in the soft and hard annihilation channels, respectively.
名古屋大学博士学位論文 学位の種類:博士(理学) (課程) 学位授与年月日:平成23年3月25日
doctoral thesis
2011-03-25
application/pdf
甲第9175号
http://hdl.handle.net/2237/14904
https://nagoya.repo.nii.ac.jp/record/13009/files/k9175.pdf
eng