408 citations · 5.6k across the 109 of their papers we have counts for
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Probing New Physics in the Vector-like Lepton Model by Lepton Electric Dipole Moments
Koichi Hamaguchi, Natsumi Nagata, Genta Osaki +1
We examine the lepton dipole moments in an extension of the Standard Model (SM), which contains vector-like leptons that couple only to the second-generation SM leptons. The model…
Report of the Topical Group on Physics Beyond the Standard Model at Energy Frontier for Snowmass 2021
Tulika Bose, Antonio Boveia, Caterina Doglioni +318
This is the Snowmass2021 Energy Frontier (EF) Beyond the Standard Model (BSM) report. It combines the EF topical group reports of EF08 (Model-specific explorations), EF09 (More gen…
Minimal Nambu-Goldstone Higgs Model in Supersymmetric SU(5) Revisited
Koichi Hamaguchi, Shihwen Hor, Natsumi Nagata
We revisit the minimal Nambu-Goldstone (NG) Higgs supersymmetric (SUSY) SU(5) grand unified model and study its phenomenological implications. The Higgs sector of the model possess…
Axion Quality Problem and Non-Minimal Gravitational Coupling in the Palatini Formulation
Dhong Yeon Cheong, Koichi Hamaguchi, Yoshiki Kanazawa +3
In axion models, the global U(1) Peccei-Quinn (PQ) symmetry is explicitly broken by non-perturbative effects of gravity, such as axionic wormholes. The gravitational violation of t…
Neutron Star Heating in Dark Matter Models for the Muon Discrepancy
Koichi Hamaguchi, Natsumi Nagata, Maura E. Ramirez-Quezada
The observed value of the muon magnetic dipole moment, which deviates from the Standard Model prediction by , can be explained in models with weakly-interacting massive parti…
Capture of Electroweak Multiplet Dark Matter in Neutron Stars
Motoko Fujiwara, Koichi Hamaguchi, Natsumi Nagata +1
If dark matter has a sizable scattering cross section with nucleons, it can efficiently be captured by a neutron star. Its energy is then transferred to the neutron star as heat th…