Speaker
Koichi Hamaguchi
(University of Tokyo)
Description
We revisit several minimal extensions of the Standard Model for dark matter. Depending on time, we discuss some or all of the following: (i) a scalar dark matter with higher-dimensional operators, where thermal misalignment provides a viable production mechanism; (ii) sterile neutrino dark matter in the presence of lepton flavor asymmetries; (iii) Majorana fermion dark matter with a coannihilating scalar, with the bino-slepton scenario in supersymmetry as a concrete benchmark; (iv) Majoron dark matter arising from a minimal extension of the seesaw mechanism. We present recent updates on each topic in light of current experimental constraints.