Super-Kamiokande (SK) can search for weakly interacting massive particles (WIMPs) by detecting neutrinos produced from WIMP annihilations occurring inside the Sun. In this analysis, we include neutrino events with interaction vertices in the detector in addition to upward-going muons produced in the surrounding rock. Compared to the previous result, which used the upward-going muons only, the signal acceptances for light (few-GeV/c^{2}-200-GeV/c^{2}) WIMPs are significantly increased. We fit 3903 days of SK data to search for the contribution of neutrinos from WIMP annihilation in the Sun. We found no significant excess over expected atmospheric-neutrino background and the result is interpreted in terms of upper limits on WIMP-nucleon elastic scattering cross sections under different assumptions about the annihilation channel. We set the current best limits on the spin-dependent WIMP-proton cross section for WIMP masses below 200  GeV/c^{2} (at 10  GeV/c^{2}, 1.49×10^{-39}  cm^{2} for χχ→bb[over ¯] and 1.31×10^{-40}  cm^{2} for χχ→τ^{+}τ^{-} annihilation channels), also ruling out some fraction of WIMP candidates with spin-independent coupling in the few-GeV/c^{2} mass range.

http://www-sk.icrr.u-tokyo.ac.jp/sk/_pdf/articles/PhysRevLett.114.141301.pdf

Search for neutrinos from annihilation of captured low-mass dark matter particles in the Sun by Super-Kamiokande

Dark Matter interpretations of the e± excesses after FERMI

The OPERA collaboration claims that muon neutrinos with a mean energy of 17.5 GeV travel 730 km from CERN to the Gran Sasso at a speed exceeding that of light by about $7.5\text{ }\text{ }\mathrm{km}/\mathrm{s}$ or 25 ppm. However, we show that superluminal neutrinos may lose energy rapidly via the bremsstrahlung of electron-positron pairs ($\ensuremath{\nu}\ensuremath{\rightarrow}\ensuremath{\nu}+{e}^{\ensuremath{-}}+{e}^{+}$). For the claimed superluminal velocity and at the stated mean energy, we find that most of the neutrinos would have suffered several pair emissions en route, causing the beam to be depleted of higher energy neutrinos. This presents a significant challenge to the superluminal interpretation of the OPERA data. Furthermore, we appeal to Super-Kamiokande and IceCube data to establish strong new limits on the superluminal propagation of high-energy neutrinos.

http://www.phys.ufl.edu/~avery/course/4390/reference/neutrino_velocity_cohen_glashow_1109.6562v1.pdf

Pair creation constrains superluminal neutrino propagation.

We present the result of an indirect search for high energy neutrinos from Weakly Interacting Massive Particle (WIMP) annihilation in the Sun using upward-going muon (upmu) events at Super-Kamiokande. Data sets from SKI-SKIII (3109.6 days) were used for the analysis. We looked for an excess of neutrino signal from the Sun as compared with the expected atmospheric neutrino background in three upmu categories: stopping, non-showering, and showering. No significant excess was observed. The 90% C.L. upper limits of upmu flux induced by WIMPs of 100 GeV c-2 were 6.4 × 10–15 cm–2 s–1 and 4.0 × 10–15 cm–2 s–1 for the soft and hard annihilation channels, respectively. These limits correspond to upper limits of 4.5 × 10–39 cm–2 and 2.7 × 10–40 cm–2 for spin-dependent WIMP-nucleon scattering cross sections in the soft and hard annihilation channels, respectively.

/pdf/an-indirect-search-for-weakly-interacting-massive-particles-3c327buonc.pdf

An indirect search for weakly interacting massive particles in the sun using 3109.6 days of upward-going muons in super-kamiokande

Are there more than three types of neutrinos in nature ? Some experiments show that there should exist at least one more type, called sterile neutrinos. Using atmospheric neutrino data from the Super-Kamiokande experiment, the authors find new limits on the sterile neutrino oscillations.

http://www-sk.icrr.u-tokyo.ac.jp/sk/_pdf/articles/PhysRevD.91.052019.pdf

Limits on sterile neutrino mixing using atmospheric neutrinos in Super-Kamiokande

Study of TeV neutrinos with upward showering muons in Super-Kamiokande

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Study of TeV neutrinos with upward showering muons in Super-Kamiokande