8 papers
Consistent fitting in big bang nucleosynthesis analysis
Sougata Ganguly, Tae Hyun Jung, Seokhoon Yun
The effective number of neutrino species, , serves as a key fitting parameter extensively employed in cosmological studies. In this work, we point out a fundamental in…
Bipartite Solution to the Lithium Problem
Sougata Ganguly, Tae Hyun Jung, Tae-Sun Park +1
The primordial lithium problem remains a persistent motivation for new-physics modifications of Big Bang nucleosynthesis, yet the precision of the observed deuterium abundance now…
Revisiting QCD-induced little inflation with chiral density wave state and its implications on pulsar timing array gravitational-wave signals
Tae Hyun Jung, Seyong Kim, Jong-Wan Lee +2
We revisit QCD-induced little inflation in which the Universe begins with a large baryon chemical potential and undergoes a strong first-order QCD phase transition, generating an o…
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…
What happens when supercooling is terminated by curvature flipping of the effective potential?
Tomasz P. Dutka, Tae Hyun Jung, Chang Sub Shin
We explore the nature of a certain type of supercooled phase transition, where the supercooling is guaranteed to end due to the curvature of the finite-temperature effective potent…
Constraining MeV to 10 GeV majoron by Big Bang Nucleosynthesis
Sanghyeon Chang, Sougata Ganguly, Tae Hyun Jung +2
We estimate the Big Bang nucleosynthesis (BBN) constraint on the majoron in the mass range between to which dominantly decays into the standard model…