4 papers
Gamma-Ray Signatures of Thermal Misalignment Dark Matter
Koichi Hamaguchi, Ryoichiro Hayakawa, Hiroki Takahashi
Thermal misalignment is a viable dark matter scenario where the misalignment of a dark matter scalar, feebly coupled to the Standard Model particles, is generated through thermal e…
Asymmetric Dark Matter from Low-Scale Spontaneous Leptogenesis
Hiroki Takahashi, Juntaro Wada
We investigate a novel type of asymmetric dark matter (ADM) model in which the dark matter asymmetry and the baryon asymmetry in our universe (BAU) are produced simultaneously via…
Exploring Chirality Structure in Nucleon Decay
Koichi Hamaguchi, Shihwen Hor, Natsumi Nagata +1
Baryon number conservation is an accidental symmetry in the Standard Model, but its violation is theoretically anticipated, making the search for such processes a promising avenue…
A Generic Analysis of Nucleon Decay Branching Fractions in Flipped SU(5) Grand Unification
Koichi Hamaguchi, Shihwen Hor, Natsumi Nagata +1
In flipped SU(5) grand unified theories, the partial decay lifetimes of certain nucleon decay channels depend generically on an unknown unitary matrix, which arises when left-hande…