3 papers
gr-qc2026
Post-Inflationary Constraints on Nonminimally Coupled Quintessential Inflation
Min Gi Park, Seong Chan Park, Tomo Takahashi +1
We investigate quintessential inflation in a nonminimally coupled scalar-tensor theory, parameterizing the post-inflationary radiation abundance independently of the reheating mech…
hep-ph2026
Beyond the Starobinsky model after ACT
Min Gi Park, Dhong Yeon Cheong, Seong Chan Park
We revisit higher order corrections to the Starobinsky inflationary model using the most recent P-ACT-LB-BK18 data, which exhibits a mild but definite tension with the predictions…
hep-ph2025
Aspects of Sommerfeld Enhancement in the light of Halo gamma-ray excess
Yongsoo Jho, Jeonghwan Park, Min Gi Park +1
We examine Sommerfeld enhancement in dark matter annihilation as a potential origin of the halo-like gamma-ray excess near GeV reported by Totani. A minimal model w…