5 papers
Freeze-in sterile neutrino dark matter in a feebly gauged model
Osamu Seto, Takashi Shimomura, Yoshiki Uchida
We consider the gauged model and examine the situation where the sterile neutrino is a dark matter candidate produced by the freeze-in mechanism. In our model, the dar…
Nambu-Goldstone Modes in Magnetized Extra Dimensions
Takuya Hirose, Hajime Otsuka, Koji Tsumura +1
We consider a gauge theory on with background magnetic fluxes. We show that a theory including arbitrary fluxes can always be studied in a theory involving o…
Pseudo-Nambu-Goldstone Dark Matter in Grand Unification
Cheng-Wei Chiang, Koji Tsumura, Yoshiki Uchida +1
We propose a grand unified theory (GUT) pseudo-Nambu-Goldstone boson (pNGB) dark matter (DM) model based on gauge symmetry. In the GUT model, the Standard Model (SM) gauge…
Scalar and fermion on-shell amplitudes in generalized Higgs effective field theory
Ryo Nagai, Masaharu Tanabashi, Koji Tsumura +1
Beyond standard model (BSM) particles should be included in effective field theory in order to compute the scattering amplitudes involving these extra particles. We formulate an ex…
Symmetry and geometry in generalized Higgs effective field theory -- Finiteness of oblique corrections v.s. perturbative unitarity
Ryo Nagai, Masaharu Tanabashi, Koji Tsumura +1
We formulate a generalization of Higgs effective field theory (HEFT) including arbitrary number of extra neutral and charged Higgs bosons (generalized HEFT, GHEFT) to describe non-…