568 citations · 1.3k across the 5 of their papers we have counts for
4 papers · 1 filter
Non-perturbative Effect on Thermal Relic Abundance of Dark Matter
Junji Hisano, Shigeki Matsumoto, Minoru Nagai +2
We point out that thermal relic abundance of the dark matter is strongly altered by a non-perturbative effect called the Sommerfeld enhancement, when constituent particles of the d…
Heavy Wino-like Neutralino Dark Matter Annihilation into Antiparticles
Junji Hisano, Shigeki Matsumoto, Osamu Saito +1
The lightest neutralino is a viable dark matter (DM) candidate. In this paper we study indirect detection of the wino-like neutralino DM using positrons and antiprotons from the an…
Non-Perturbative Effect on Dark Matter Annihilation and Gamma Ray Signature from Galactic Center
Junji Hisano, Shigeki. Matsumoto, Mihoko M. Nojiri +1
Detection of gamma rays from dark matter annihilation in the galactic center is one of the feasible techniques to search for dark matter. We evaluate the gamma ray flux in the case…
Direct Detection of the Wino- and Higgsino-like Neutralino Dark Matters at One-Loop Level
Junji Hisano, Shigeki Matsumoto, Mihoko M. Nojiri +1
The neutralino-nucleon (\tildeχ^0-N) scattering is an important process for direct dark matter searches. In this paper we discuss one-loop contributions to the cross section in the…