47 citations · 398 across the 21 of their papers we have counts for
21 papers
A Unified Dark Matter Explanation for and the Super-Kamiokande Antineutrino Excess
Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko
Recent results from Super-Kamiokande and Belle II have revealed intriguing excesses over Standard Model expectations. Super-Kamiokande observes a mild excess of -like e…
TeV-scale unification of light dark matter and neutrino mass
Cheng-Wei Chiang, Shu-Yu Ho, Van Que Tran
We demonstrate that TeV-scale heavy neutral leptons (HNLs) responsible for inverse-seesaw neutrino mass generation can simultaneously fix the cosmological abundance and decay prope…
Recent excess and muon illuminating light dark sector with Higgs portal
Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko
The Belle II collaboration recently announced that they observed the decay process for the first time. This dineutrino mode of has been…
Light Thermal Self-Interacting Dark Matter in the Shadow of Non-Standard Cosmology
Shu-Yu Ho, Pyungwon Ko, Dibyendu Nanda
In this paper, we construct a viable model for a GeV scale self-interacting dark matter (DM), where the DM was thermally produced in the early universe. Here, a new vector-like fer…
Supernova Axion Emissivity with Resonance in Heavy Baryon Chiral Perturbation Theory
Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko +1
In this paper, we evaluate the energy loss rate of supernovae induced by the axion emission process with the resonance in the heavy baryon chiral pert…
An Asymmetric SIMP Dark Matter Model
Shu-Yu Ho
In this paper, we construct the first asymmetric strongly interacting massive particles (SIMP) dark matter (DM) model, where a new vector-like fermion and a new complex scalar both…
Scalar and Fermion Two-component SIMP Dark Matter with an Accidental Symmetry
Shu-Yu Ho, Pyungwon Ko, Chih-Ting Lu
In this paper, we construct for the first time a two-component strongly interacting massive particles (SIMP) dark matter (DM) model, where a complex scalar and a vector-like fermio…
Comment on "New Freezeout Mechanism for Strongly Interacting Dark Matter"
Shu-Yu Ho, Chih-Ting Lu
Inspired by our recent paper "reshuffled SIMP dark matter", we notice that the reaction rate of the two-loop induced process may dominate over or be comparable with that…
Reshuffled Strongly Interacting Massive Particle Dark Matter
Shu-Yu Ho, Pyungwon Ko, Chih-Ting Lu
In this work, we reanalyze the multi-component strongly interacting massive particle (mSIMP) scenario using an effective operator approach. As in the single-component SIMP case, th…
Explaining the MiniBooNE Anomalous Excess via Leptophilic ALP-Sterile Neutrino Coupling
Chia-Hung Vincent Chang, Chuan-Ren Chen, Shu-Yu Ho +1
Recently, the MiniBooNE experiment at Fermilab has updated the results with increased data and reported an excess of electronlike events () in the neutrino…
Hidden Monopole Dark Matter via Axion Portal and its Implications for Direct Detection Searches, Beam-Dump Experiments, and the Tension
Ryuji Daido, Shu-Yu Ho, Fuminobu Takahashi
Hidden monopole is a plausible dark matter candidate due to its stability, but its direct experimental search is extremely difficult due to feeble interactions with the standard mo…
Relaxing the Cosmological Moduli Problem by Low-scale Inflation
Shu-Yu Ho, Fuminobu Takahashi, Wen Yin
We show that the cosmological abundance of string axions is much smaller than naive estimates if the Hubble scale of inflation, , is sufficiently low (but can still be…
Enhanced photon coupling of ALP dark matter adiabatically converted from the QCD axion
Shu-Yu Ho, Ken'ichi Saikawa, Fuminobu Takahashi
We revisit the adiabatic conversion between the QCD axion and axion-like particle (ALP) at level crossing, which can occur in the early universe as a result of the existence of a h…
A Radiative Neutrino Mass Model with SIMP Dark Matter
Shu-Yu Ho, Takashi Toma, Koji Tsumura
We propose the first viable radiative seesaw model, in which the neutrino masses are induced radiatively via the two-loop Feynman diagram involving Strongly Interacting Massive Par…
Systematic U(1)_{B-L} Extensions of Loop-Induced Neutrino Mass Models with Dark Matter
Shu-Yu Ho, Takashi Toma, Koji Tsumura
We study the gauged U(1)_{B-L} extensions of the models for neutrino masses and dark matter. In this class of models, tiny neutrino masses are radiatively induced through the loop…
Effects of Two Inert Scalar Doublets on Higgs Interactions and Electroweak Phase Transition
Amine Ahriche, Gaber Faisel, Shu-Yu Ho +2
We study some implications of the presence of two inert scalar doublets which are charged under a dark Abelian gauge symmetry. Specifically, we investigate the effects of the new s…
Exploring X-Ray Lines as Scotogenic Signals
Gaber Faisel, Shu-Yu Ho, Jusak Tandean
We consider some implications of X-ray lines from certain astronomical objects as potential effects of dark matter decay in the context of the scotogenic model, where neutrinos acq…
Probing Scotogenic Effects in e+e- Colliders
Shu-Yu Ho, Jusak Tandean
We explore the possibility of employing e+e- colliders to probe the scotogenic model, in which neutrinos get mass radiatively via one-loop interactions involving dark matter. Assum…
Probing Scotogenic Effects in Higgs Boson Decays
Shu-Yu Ho, Jusak Tandean
The recent observation of a Higgs boson at the LHC and experimental confirmation of nonvanishing neutrino-mixing parameter sin(theta_13) offer important means to test physics beyon…
Kaon Decay into Three Photons Revisited
Shu-Yu Ho, Jusak Tandean
We evaluate the rare radiative kaon decays K_{L,S} -> 3 gamma. Applying the requirements of gauge invariance and Bose symmetry, we derive a general form of the decay amplitude, inc…
Scalar Dark Matter and Standard Model with Four Generations
Xiao-Gang He, Shu-Yu Ho, Jusak Tandean +1
We consider a scalar dark matter model, the SM4+D, consisting of the standard model with four generations (SM4) and a real gauge-singlet scalar called darkon, D, as the weakly inte…