6 papers
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…
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 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…
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…