Ryosuke Sato

collaborators

4 papers

hep-ph2026

A particle on a ring or: how I learned to stop worrying and love $I^¸$ -vacua

Mohammad Aghaie, Ryosuke Sato

Recently, Ai, Cruz, Garbrecht, and Tamarit (arXiv:2001.07152, arXiv:2404.16026, arXiv:2511.04216) claimed that the strong CP problem can be avoided by adopting a particular order o…

hep-ph2026

QCD axion from chiral gauge theories

Ryosuke Sato, Shonosuke Takeshita

We present models of axion based on supersymmetric chiral gauge theories. In these models, the PQ symmetry is spontaneously broken by the non-perturbative dynamics of chiral gauge…

hep-ph2026

Excluding MeV-scale QCD axions by $K_{L} \to I ¨ ^{0} I ¨ ^{0} a$ at KTeV

Takaya Iwai, Ryosuke Sato, Kohsaku Tobioka +1

An interesting proposal suggests that a QCD axion $(a)$ coupling to the up quark, down quark, and electron remains viable for an axion mass near 10~MeV. In this paper, this possibi…

math.CO2025

The minimum number of vertices and edges of connected graphs with ind-match $(G) = p$ , min-match $(G) = q$ and match $(G) = r$

Kazunori Matsuda, Ryosuke Sato, Yuichi Yoshida

Let ind-match $(G)$ , min-match $(G)$ and match $(G)$ denote the induced matching number, minimum matching number and matching number of a graph $G$ , respectively. It is known that ind…

A particle on a ring or: how I learned to stop worrying and love I^¸-vacua

QCD axion from chiral gauge theories

Excluding MeV-scale QCD axions by KL​→I¨0I¨0a at KTeV

The minimum number of vertices and edges of connected graphs with ind-match(G)=p, min-match(G)=q and match(G)=r

A particle on a ring or: how I learned to stop worrying and love $I^¸$ -vacua

Excluding MeV-scale QCD axions by $K_{L} \to I ¨ ^{0} I ¨ ^{0} a$ at KTeV

The minimum number of vertices and edges of connected graphs with ind-match $(G) = p$ , min-match $(G) = q$ and match $(G) = r$