P. Ko

activity

20242026

collaborators

7 papers

hep-ph2026

A Unified Dark Matter Explanation for $B^{+} \to K^{+} ν ν ˉ$ 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 $ν ˉ_{e}$ -like e…

hep-ph2025

$B^{+} \to K^{+} ν ν ˉ$ Excess and DM semi-annihilation

Jongkuk Kim, Pyungwon Ko

In 2023, Belle II collaboration announced the observarion of the $B^{+} \to K^{+} ν ν ˉ$ decay channel for the first time. This decay channel provides a clean signal with high precisi…

hep-ph2025

Low-reheating scenario in dark Higgs inflation and its impact on dark photon dark matter production

Sarif Khan, Jinsu Kim, Pyungwon Ko

We investigate dark matter (DM) phenomenology and cosmic inflation within a unified framework based on a dark $U (1)_{D}$ gauge extension of the Standard Model (SM). The associated da…

hep-ph2025

Linking the KM3-230213A Neutrino Event to Dark Matter Decay and Gravitational Wave signals

Sarif Khan, Jongkuk Kim, Pyungwon Ko

The KM3NeT collaboration recently reported the detection of an ultra-high-energy (UHE) neutrino event, dubbed KM3-230213A. This is the first observed neutrino event with energy of…

hep-ph2024

Multi-component dark matter and Galactic 511 keV $γ$ -ray emission

Sarif Khan, Jinsu Kim, Jongkuk Kim +1

We study multi-component dark matter scenarios and the Galactic 511 keV $γ$ -ray emission line signal in the framework of a local, dark $U (1)_{D}$ extension of the Standard Model. A l…

hep-ph2024

Pseudo Nambu-Goldstone Boson DM with Linear Symmetry Breaking: Revisited

Jongkuk Kim, P. Ko

In this work, we revisit pseudo Nambu Goldstone boson (pNGB) DM model where global $U (1)$ dark symmetry is spontaneously broken as well as explicitly with broken by with linear sym…

hep-ph2024

Recent $B^{+} \to K^{+} ν ν ˉ$ excess and muon $g - 2$ illuminating light dark sector with Higgs portal

Shu-Yu Ho, Jongkuk Kim, Pyungwon Ko

The Belle II collaboration recently announced that they observed the $B^{+} \to K^{+} ν ν ˉ$ decay process for the first time. This dineutrino mode of $B^{+} \to K^{+} ν ν ˉ$ has been…

A Unified Dark Matter Explanation for B+→K+ννˉ and the Super-Kamiokande Antineutrino Excess

B+→K+ννˉ Excess and DM semi-annihilation

Low-reheating scenario in dark Higgs inflation and its impact on dark photon dark matter production

Linking the KM3-230213A Neutrino Event to Dark Matter Decay and Gravitational Wave signals

Multi-component dark matter and Galactic 511 keV γ-ray emission

Pseudo Nambu-Goldstone Boson DM with Linear Symmetry Breaking: Revisited

Recent B+→K+ννˉ excess and muon g−2 illuminating light dark sector with Higgs portal

A Unified Dark Matter Explanation for $B^{+} \to K^{+} ν ν ˉ$ and the Super-Kamiokande Antineutrino Excess

$B^{+} \to K^{+} ν ν ˉ$ Excess and DM semi-annihilation

Multi-component dark matter and Galactic 511 keV $γ$ -ray emission

Recent $B^{+} \to K^{+} ν ν ˉ$ excess and muon $g - 2$ illuminating light dark sector with Higgs portal