165 citations · 2.5k across the 85 of their papers we have counts for
10 papers · 1 filter
Axion dark matter from first-order phase transition, and very high energy photons from GRB 221009A
Shota Nakagawa, Fuminobu Takahashi, Masaki Yamada +1
We study an axion-like particle (ALP) that experiences the first-order phase transition with respect to its mass or potential minimum. This can be realized if the ALP obtains a pot…
Wash-in leptogenesis after axion inflation
Valerie Domcke, Kohei Kamada, Kyohei Mukaida +2
CP violation and the violation of baryon-minus-lepton number B-L do not necessarily have to occur simultaneously in order to accomplish successful leptogenesis. Instead, it suffice…
Formation of hot spots around small primordial black holes
Minxi He, Kazunori Kohri, Kyohei Mukaida +1
In this paper, we investigate the thermalization of Hawking radiation from primordial black holes (PBHs) in the early Universe, taking into account the interference effect on therm…
Cascades of high-energy SM particles in the primordial thermal plasma
Kyohei Mukaida, Masaki Yamada
High-energy standard model (SM) particles in the early Universe are generated by the decay of heavy long-lived particles. The subsequent thermalization occurs through the splitting…
A new constraint on primordial lepton flavour asymmetries
Valerie Domcke, Kohei Kamada, Kyohei Mukaida +2
A chiral chemical potential present in the early universe can source helical hypermagnetic fields through the chiral plasma instability. If these hypermagnetic fields survive until…
Gravitational production of dark photon dark matter with mass generated by the Higgs mechanism
Takanori Sato, Fuminobu Takahashi, Masaki Yamada
We study the gravitational production of dark photon dark matter during inflation, when dark photons acquire mass by the Higgs mechanism. In the previous study, it was assumed that…
Cosmic F- and D-strings from pure Yang-Mills theory
Masaki Yamada, Kazuya Yonekura
We discuss the formation of cosmic strings or macroscopic color flux tubes after the deconfinement/confinement phase transition in the pure Yang-Mills theory. Based on holographic…
Cosmic strings from pure Yang-Mills theory
Masaki Yamada, Kazuya Yonekura
We discuss the formation of cosmic strings or macroscopic color flux tubes at the phase transition from the deconfinement to confinement phase in pure Yang-Mills (YM) theory, such…
Early-Universe Model Building
Pouya Asadi, Saurabh Bansal, Asher Berlin +37
Theoretical investigations into the evolution of the early universe are an essential part of particle physics that allow us to identify viable extensions to the Standard Model as w…
Baryon Asymmetric Universe from Spontaneous CP Violation
Kohei Fujikura, Yuichiro Nakai, Ryosuke Sato +1
Spontaneous CP violation, such as the Nelson-Barr (NB) mechanism, is an attractive scenario for addressing the strong CP problem while realizing the observed phase of the Cabibbo-K…