16 citations · 20 across the 5 of their papers we have counts for
5 papers
A quality-coupling relation in chiral axion model
Yu-Cheng Qiu
The quality of the QCD axion can be protected by a gauge symmetry. This work considers a gauged chiral . The vacuum expectation values of two complex scalars break $U(1…
High Reheating Temperature without Axion Domain Walls
Shota Nakagawa, Yuichiro Nakai, Yu-Cheng Qiu +2
We investigate a cosmological scenario in which the Peccei-Quinn (PQ) symmetry remains broken in the entire history of the Universe, thereby avoiding the formation of axion strings…
Interpreting Cosmic Birefringence and DESI Data with Evolving Axion in CDM
Shota Nakagawa, Yuichiro Nakai, Yu-Cheng Qiu +1
Recent cosmological observations have revealed growing tensions with the standard CDM model, including indications of isotropic cosmic birefringence and deviations from …
Wiggly dilaton: a landscape of spontaneously broken scale invariance
Sudhakantha Girmohanta, Yuichiro Nakai, Yu-Cheng Qiu +1
The dilaton emerges as a pseudo-Nambu-Goldstone boson (pNGB) associated with the spontaneous breaking of scale invariance in a nearly conformal field theory (CFT). We show the exis…
Can we explain cosmic birefringence without a new light field beyond Standard Model?
Yuichiro Nakai, Ryo Namba, Ippei Obata +2
The recent analysis of the Planck 2018 polarization data shows a nonzero isotropic cosmic birefringence (ICB) that is not explained within the CDM paradigm. We then explore the…