4 papers
Significance of soft-scale breaking on primordial black hole production in Coleman-Weinberg type supercooling-phase transition
He-Xu Zhang, Katsuya Hashino, Hiroyuki Ishida +1
Ultra-supercooling phase transitions can generate large overdensities in the Universe, potentially leading to the formation of primordial black holes (PBHs), which can also be a da…
Dark QCD perspective inspired by strong CP problem at QCD scale
Bin Wang, Shinya Matsuzaki, Hiroyuki Ishida
We discuss a QCD-scale composite axion model arising from dark QCD coupled to QCD. The presently proposed scenario not only solves the strong CP problem, but also is compatible wit…
Walking-dilaton hybrid inflation with Higgs embedded in dynamical scalegenesis
Jie Liu, He-Xu Zhang, Hiroyuki Ishida +1
We propose a hybrid inflationary scenario based on eight-flavor hidden QCD with the hidden colored fermions being in part gauged under . This hidden QCD is almost scale…
Impact of local CP-odd domain in hot QCD on axionic domain-wall interpretation for NANOGrav 15-year Data
Linlin Huang, Yuanyuan Wang, He-Xu Zhang +4
We argue that the axionic domain-wall with a QCD bias may be incompatible with the NANOGrav 15-year data on a stochastic gravitational wave (GW) background, when the domain wall ne…