53 citations · 54 across the 9 of their papers we have counts for
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Majoron-driven spontaneous leptogenesis in type-II seesaw model
Eung Jin Chun, Tae Hyun Jung, Jin Sun
We investigate a minimal realization of spontaneous leptogenesis in the type-II seesaw model, where the lepton and Higgs asymmetries are generated as decay and inverse-decay proces…
Self-Interacting Sterile Neutrino Cold Dark Matter: Resonant Production Mechanism in the Early Universe
Eung Jin Chun, Kenji Kadota, Seokhoon Yun
Sterile neutrinos are well-motivated dark matter candidates, but their conventional production through active-sterile mixing is tightly constrained by X-ray searches and structure-…
Probing Inelastic Dark Matter via Cosmic-Ray Upscattering in NGC 1068
Eung Jin Chun, Sanjoy Mandal, Abhishek Roy
We study constraints on sub-GeV inelastic dark matter (iDM) from cosmic-ray (CR) cooling in the active galactic nucleus (AGN) NGC 1068. In dense dark matter (DM) spikes surrounding…
Spontaneous Cogensis by QCD axion in Type I Seesaw
Eung Jin Chun
We propose a generic axion--driven cogenesis scenario in which both the baryon asymmetry and dark matter abundance originate from the kinetic misalignment. The framework unifies th…
Phenomenology of Dirac neutrino EFTs up to dimension six
Anirban Biswas, Eung Jin Chun, Sanjoy Mandal +1
The gauge-singlet right-handed neutrinos would be essential to explain the tiny masses of active neutrinos. We consider the effective field theory of the Standard Model extended wi…
Cogenesis by a sliding pNGB with symmetry non-restoration
Eung Jin Chun, Suruj Jyoti Das, Minxi He +2
We demonstrate that a pseudo-Nambu-Goldstone boson (pNGB) with an initial misalignment angle can drive successful spontaneous baryogenesis and serve as a dark matter (DM) candidate…
Collider imprints of right handed neutrino magnetic moment operator
Eung Jin Chun, Sanjoy Mandal, Rojalin Padhan
We consider most general effective Lagrangian up to dimension five, built with Standard Model~(SM) fields and right-handed neutrinos~(RHNs) . Assuming that the RHNs are presen…
Leptogenesis driven by majoron
Eung Jin Chun, Tae Hyun Jung
We propose a leptogenesis scenario where baryon asymmetry generation is assisted by the kinetic motion of the majoron, , in the process of lepton-number violating inverse decays…
Dark Matters in Axino Gravitino Cosmology
Eung Jin Chun, Hang Bae Kim, Jihn E. Kim
It is suggested that the axino mass in the 1 MeV region and gravitino mass in the eV region can provide an axino lifetime of order of the time of photon decoupling. In this case, s…