5 papers
Deconstructing the Extra-Dimensional Axion
Shihwen Hor, Yuichiro Nakai, Motoo Suzuki +1
We present a four-dimensional deconstruction of the extra-dimensional axion arising from a gauge theory in a five-dimensional orbifold, where the axion is identified with th…
Specially Embedding a Composite Axion Model
Shihwen Hor, Yuichiro Nakai, Motoo Suzuki +1
We present a novel framework of the post-inflationary composite axion to address the strong CP problem without the cosmological domain wall problem. Conventional composite axion mo…
Small Instantons and the Post-Inflationary QCD Axion in a Special Product GUT
Shihwen Hor, Yuichiro Nakai, Motoo Suzuki +1
We present a new framework of grand unification that is equipped with an axion solution to the strong CP problem without a domain wall problem when the Peccei-Quinn (PQ) symmetry i…
High Quality QCD Axion via Electric-Magnetic Duality
Shota Nakagawa, Yuichiro Nakai, Junxuan Xu +1
We propose a novel paradigm for the QCD axion with high-quality Peccei-Quinn (PQ) symmetry on the basis of electric-magnetic duality in the conformal window of a supersymmetric gau…
How Viable Is a QCD Axion near 10 MeV?
Sudhakantha Girmohanta, Shota Nakagawa, Yuichiro Nakai +1
There has been an attempt to revive the visible QCD axion at the 10 MeV scale assuming that it exclusively couples to the first-generation quarks and the electron. This variant of…