11 citations · 14 across the 9 of their papers we have counts for
11 papers
From the LZ Event to Grand Unification: Heavy Higgsinos and Proton Decay
Shihwen Hor, Natsumi Nagata, Tsutomu T. Yanagida
The recently reported LUX-ZEPLIN (LZ) event has renewed interest in inelastic Higgsino dark matter. While a weak-scale Higgsino provides a simple interpretation of the event, such…
Deconstructing the Extra-Dimensional Axion
Shihwen Hor, Yuichiro Nakai, Motoo Suzuki +1
We present a four-dimensional deconstruction of the extra-dimensional axion arising from a gauge theory in a five-dimensional orbifold, where the axion is identified with th…
Specially Embedding a Composite Axion Model
Shihwen Hor, Yuichiro Nakai, Motoo Suzuki +1
We present a novel framework of the post-inflationary composite axion to address the strong CP problem without the cosmological domain wall problem. Conventional composite axion mo…
Planck-Scale Effects on Nucleon Decay in Minimal Supersymmetric SU(5)
John Ellis, Jason L. Evans, Shihwen Hor +2
We examine the impact on the phenomenology of the minimal supersymmetric SU(5) Grand Unified Theory (GUT) of dimension-5 operators with coefficients suppressed by the Planck mass s…
Dark Matter Heating of Compact Stars Beyond Capture: A Relativistic Framework for Energy Deposition by Particle Beams
Jaime Hoefken Zink, Shihwen Hor, Maura E. Ramirez-Quezada
Compact astrophysical objects, such as neutron stars and white dwarfs, can act as detectors of energetic particle fluxes originating from astrophysical accelerators. While most exi…
Small Instantons and the Post-Inflationary QCD Axion in a Special Product GUT
Shihwen Hor, Yuichiro Nakai, Motoo Suzuki +1
We present a new framework of grand unification that is equipped with an axion solution to the strong CP problem without a domain wall problem when the Peccei-Quinn (PQ) symmetry i…
Dark Matter Interactions in White Dwarfs: A Multi-Energy Approach to Capture Mechanisms
Jaime Hoefken Zink, Shihwen Hor, Maura E. Ramirez-Quezada
White dwarfs offer a compelling avenue for probing interactions of dark matter particles, particularly in the challenging sub-GeV mass regime. The constraints derived from these ce…
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…
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…
R-Symmetric Flipped SU(5)
Koichi Hamaguchi, Shihwen Hor, Natsumi Nagata
We construct a supersymmetric flipped SU(5) grand unified model that possesses an symmetry. This symmetry forbids dangerous non-renormalizable operators suppressed by a cut…