Zobrazeno 1 - 10
of 245
pro vyhledávání: '"Yoshioka, Koichi"'
Autor:
Yamamoto, Yasuhiro, Yoshioka, Koichi
This paper studies the dynamics of scalar particle production, focusing on the presence of multiple fields and couplings in the medium. The interplay of various fields and couplings can influence the production rate, potentially overshadowing the eff
Externí odkaz:
http://arxiv.org/abs/2407.17192
We study two-field inflation derived from a single complex scalar with a nonzero vacuum expectation value. Inflation is characterized by two parameters, the vacuum expectation value and the mass parameter of the phase mode, which give rise to a varie
Externí odkaz:
http://arxiv.org/abs/2407.12544
Autor:
Yamamoto, Yasuhiro, Yoshioka, Koichi
We revisit the stellar cooling limits on the light scalar boson whose coupling to the Standard Model particles is described by its mixing with the Higgs boson. Strong constraints have been obtained from the electron-nucleus bremsstrahlung process and
Externí odkaz:
http://arxiv.org/abs/2303.03123
In this work, the current stability is discussed for cosmic strings with the bosonic superconductivity. A non-vanishing curvature of string generally induce the quantum instability of the current-carrying particle. Its decay rates are explored for va
Externí odkaz:
http://arxiv.org/abs/2209.03223
We consider a situation where right-handed neutrinos couple to a light scalar which is possibly a Nambu-Goldstone boson resulting from high-energy symmetry breaking. Its coupling is typically complex-valued and flavor-dependent. In this work, we inve
Externí odkaz:
http://arxiv.org/abs/2110.11096
A pseudo Nambu-Goldstone boson (pNGB) is a natural candidate of dark matter in that it avoids the severe direct detection bounds. We show in this paper that the pNGB has another different and interesting face with a higher symmetry breaking scale. Su
Externí odkaz:
http://arxiv.org/abs/2012.10286
We study the axion strings with the electroweak gauge flux in the DFSZ axion model and show that these strings, called the electroweak axion strings, can exhibit superconductivity without fermionic zero modes. We construct three types of electroweak
Externí odkaz:
http://arxiv.org/abs/2010.02834
The Majoron, the Nambu-Goldstone boson of lepton number symmetry, is an interesting candidate for dark matter as it deeply connects the dark matter and neutrino physics. In this paper, we consider the Majoron dark matter as pseudo Nambu-Goldstone bos
Externí odkaz:
http://arxiv.org/abs/2004.00599
Publikováno v:
PTEP 2016 (2016) no.9, 093B03
In $D=4$, $\cal{N}=1$ conformal superspace, the Yang-Mills matter coupled supergravity system is constructed where the Yang-Mills gauge interaction is introduced by extending the superconformal group to include the K\"ahler isometry group of chiral m
Externí odkaz:
http://arxiv.org/abs/1606.06515
Autor:
Nishida, Michinobu, Yoshioka, Koichi
Publikováno v:
Phys. Rev. D 94, 095022 (2016)
We study the Higgs boson mass and the muon anomalous magnetic moment (the muon $g-2$) in a supersymmetric standard model with vector-like generations. The infrared physics of the model is governed by strong renormalization-group effects of the gauge
Externí odkaz:
http://arxiv.org/abs/1605.06675