162 citations · 2.1k across the 70 of their papers we have counts for
13 papers · 1 filter
Stability of domain wall network with initial inflationary fluctuations, and its implications for cosmic birefringence
Diego Gonzalez, Naoya Kitajima, Fuminobu Takahashi +1
We study the formation and evolution of domain walls with initial inflationary fluctuations by numerical lattice calculations that, for the first time, correctly take into account…
Weak-Scale Higgs Inflation
Wen Yin
The present measurement of the standard model (SM) parameters suggests that the Higgs effective potential has a maximum at the intermediate scale, and the electroweak (EW) vacuum i…
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…
Early dark energy by dark Higgs, and axion-induced non-thermal trapping
Shota Nakagawa, Fuminobu Takahashi, Wen Yin
We propose a new scenario of early dark energy (EDE) with a dark Higgs trapped at the origin. To keep this dark Higgs trapped until around the matter-radiation equality, we use dar…
Probing a light dark sector at future lepton colliders via invisible decays of the SM-like and dark Higgs bosons
Gholamhossein Haghighat, Mojtaba Mohammadi Najafabadi, Kodai Sakurai +1
A renormalizable UV model for Axion-Like Particles (ALPs) or hidden photons, that may explain the dark matter usually involves a dark Higgs field which is a singlet under the stand…
Indirect Detection of eV Dark Matter via Infrared Spectroscopy
Taiki Bessho, Yuji Ikeda, Wen Yin
Infrared spectroscopy has been developed significantly. In particular, infrared photons can be measured with high spectral and angular resolution in state-of-art spectrographs. The…
Ultra-relativistic bubbles from the simplest Higgs portal and their cosmological consequences
Aleksandr Azatov, Giulio Barni, Sabyasachi Chakraborty +2
We analyze the phase transitions in the minimal extension of the SM with a real singlet scalar field. The novelty of our study is that we identify and analyze in details the region…
High Energy Sphalerons for Baryogenesis at Low Temperatures
Joerg Jaeckel, Wen Yin
We discuss baryogenesis in scenarios where the Universe is reheated to temperatures GeV by the decay of long-lived massive particles into energetic SM particles. Be…
Instability of the Electroweak Vacuum in Starobinsky Inflation
Qiang Li, Takeo Moroi, Kazunori Nakayama +1
We study the stability of the electroweak vacuum during and after the Starobinsky inflation, assuming the existence of the non-minimal Higgs coupling to the Ricci scalar. In the St…
Power spectrum of domain-wall network and its implications for isotropic and anisotropic cosmic birefringence
Naoya Kitajima, Fumiaki Kozai, Fuminobu Takahashi +1
Recently, based on a novel analysis of the Planck satellite data, a hint of a uniform rotation of the polarization of cosmic microwave background photons, called isotropic cosmic b…
Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly
Kazunori Nakayama, Wen Yin
Recently anomalous flux in the cosmic optical background (COB) has been reported by the New Horizon observations. The COB flux is , at the LO…
Singlet extensions and W boson mass in the light of the CDF II result
Kodai Sakurai, Fuminobu Takahashi, Wen Yin
Recently, the CDF collaboration has reported the precise measurement of the W boson mass, MeV, based on fb of TeV c…
Suppression of Higgs Mixing by Quantum Zeno Effect
Kodai Sakurai, Wen Yin
The Higgs portal interaction to a singlet sector of the standard model (SM) gauge group is widely-studied. In this Letter, we show that a quantum effect is important if the Higgs f…