78 citations · 219 across the 10 of their papers we have counts for
10 papers
More about Q-ball with elliptical orbit
Fuminori Hasegawa, Jeong-Pyong Hong, Motoo Suzuki
Q-balls formed from the Affleck-Dine field have rich cosmological implications and have been extensively studied from both theoretical and simulational approaches. From the theoret…
Primordial Black Holes from Affleck-Dine Mechanism
Fuminori Hasegawa, Masahiro Kawasaki
The recent observations of the gravitational waves (GWs) by LIGO-Virgo collaboration infer the increasing possibility of the primordial black holes (PBHs). Recently it was pointed…
Cogenesis of LIGO Primordial Black Holes and Dark Matter
Fuminori Hasegawa, Masahiro Kawasaki
In this letter, we propose a novel scenario which simultaneously explains primordial black holes (PBHs) and dark matter in the minimally supersymmetric sta…
Inflaton fragmentation in E-models of cosmological -attractors
Fuminori Hasegawa, Jeong-Pyong Hong
Cosmological -attractors are observationally favored due to the asymptotic flatness of the potential. Since its flatness induces the negative pressure even after inflation, the…
Gravitino Problem in Inflation Driven by Inflaton-Polonyi Kähler Coupling
Fuminori Hasegawa, Kazunori Nakayama, Takahiro Terada +1
We discuss the cosmological gravitino problem in inflation models in which the inflaton potential is constructed from Kähler potential rather than superpotential: a representative…
Oscillating Affleck-Dine condensate and its cosmological implications
Fuminori Hasegawa, Masahiro Kawasaki
We study the dynamics of the Affleck-Dine field after inflation in more detail. After inflation, the Affleck-Dine field inevitably oscillates around the potential minimum. This osc…
Gravitino Problem in Minimal Supergravity Inflation
Fuminori Hasegawa, Kyohei Mukaida, Kazunori Nakayama +2
We study non-thermal gravitino production in the minimal supergravity inflation. In this minimal model utilizing orthogonal nilpotent superfields, the particle spectrum includes on…
de Sitter vacuum from supergravity
Fuminori Hasegawa, Yusuke Yamada
We propose a supergravity model with a constrained curvature multiplet, which realizes the Starobinsky inflation and the de Sitter vacuum in the present universe simultaneously. Su…
Component action of nilpotent multiplet coupled to matter in 4 dimensional supergravity
Fuminori Hasegawa, Yusuke Yamada
We construct the component action of the system including an ordinary matter and a nilpotent multiplet in global and local supersymmetric framework. The higher dimensional operator…
Illustrating SUSY breaking effects on various inflation mechanisms
Hiroyuki Abe, Shuntaro Aoki, Fuminori Hasegawa +1
We consider the supersymmetry breaking effects on typical inflation models with different types of Kähler potential. The critical size of supersymmetry-breaking scale, above which…