6 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…
Towards a Post-Inflationary Composite Axion Model
Aleksandr Azatov, Mohamed Mahdi Khalil, Motoo Suzuki
Composite axions offer a scenario where the axion emerges as a pion-like state, avoiding fine-tuning of elementary scalars and ameliorating the axion quality problem. Despite these…
Bias with a Timer: Axion Domain Wall Decay and Dark Matter
Sally Yuxuan Hao, Shota Nakagawa, Yuichiro Nakai +1
We explore the interplay of the post-inflationary QCD axion and a light scalar field for the axion domain wall decay and dark matter (DM). The scalar field possesses a nonzero vacu…
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…
Note on Warped Compactification -- Finite Brane Potentials and Non-Hermiticity --
Sudhakantha Girmohanta, Yuichiro Nakai, Motoo Suzuki +2
We study radius stabilization in the Randall-Sundrum model without assuming any unnaturally large stabilizing scalar potential parameter at the boundary branes () by the freque…