From the 1 of 19 linked papers with an AI index.
19 papers
Particle Production via Rippled Bubble Walls
Ryusuke Jinno, Shota Nakagawa, Yuichiro Nakai +1
The paper studies how spatial ripples on ultra‑relativistic thick bubble walls during a first‑order phase transition can boost the non‑thermal production of heavy particles, introd…
Transient Bias for CP Domain Wall Decay and Dark Matter
Sally Yuxuan Hao, Fangchao Liu, Shota Nakagawa +1
Spontaneous CP violation (SCPV) provides an attractive solution to the strong CP problem. However, SCPV after inflation suffers from the formation of CP domain walls, requiring the…
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…
Landscape of Spontaneous CP Violation
Yuichiro Nakai
Spontaneous CP violation (SCPV) provides a promising solution to the strong CP problem, explaining the smallness of the QCD -angle while generating the Cabibbo-Kobayashi-Maskaw…
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…
Neutron Portal and Dark Matter-Baryon Coincidence: from UV Completion to Phenomenology
Sudhakantha Girmohanta, Yuichiro Nakai, Yoshihiro Shigekami +1
We present a dynamical solution to the dark matter-baryon coincidence problem based on the neutron portal operator connecting the visible and dark sector asymmetries. This framewor…