165 citations · 2.5k across the 85 of their papers we have counts for
6 papers · 1 filter
On Longevity of I-ball/Oscillon
Kyohei Mukaida, Masahiro Takimoto, Masaki Yamada
We study I-balls/oscillons, which are long-lived, quasi-periodic, and spatially localized solutions in real scalar field theories. Contrary to the case of Q-balls, there is no evid…
SIMP from a strong U(1) gauge theory with a monopole condensation
Ayuki Kamada, Masaki Yamada, Tsutomu T. Yanagida +1
We provide a variant model of strongly interacting massive particle (SIMP), where composite dark matter comes from a strongly interacting U(1) theory. We first explain a non-Abelia…
Diphoton Excess as a Hidden Monopole
Masaki Yamada, Tsutomu T. Yanagida, Kazuya Yonekura
We provide a theory with a monopole of a strongly-interacting hidden U(1) gauge symmetry that can explain the 750-GeV diphoton excess reported by ATLAS and CMS. The excess results…
Charged Q-ball Dark Matter from and direction
Jeong-Pyong Hong, Masahiro Kawasaki, Masaki Yamada
We consider nearly equal number of gauge mediation type charged (anti-) Q-balls with charge of well before the BBN epoch and discussed how they evolve in time. We…
Diphoton excess from hidden U(1) gauge symmetry with large kinetic mixing
Fuminobu Takahashi, Masaki Yamada, Norimi Yokozaki
We show that the 750 GeV diphoton excess can be explained by introducing vector-like quarks and hidden fermions charged under a hidden U(1) gauge symmetry, which has a relatively l…
Cosmology with a Heavy Polonyi Field
Keisuke Harigaya, Taku Hayakawa, Masahiro Kawasaki +1
We consider a cosmologically consistent scenario with a heavy Polonyi field. The Polonyi field with a mass of decays before the Big-Bang Nucleosynthesis (…