48 citations · 98 across the 4 of their papers we have counts for
4 papers
New scenario of QCD axion clump formation I: Linear analysis
Naoya Kitajima, Kazuhiro Kogai, Yuko Urakawa
The QCD axion acquires the potential through the non-perturbative effect of the QCD matters around the QCD phase transition. During this period, the direct interaction between the…
Galaxy imaging surveys as spin-sensitive detector for cosmological colliders
Kazuhiro Kogai, Kazuyuki Akitsu, Fabian Schmidt +1
Galaxy imaging surveys provide us with information on both the galaxy distribution and their shapes. In this paper, we systematically investigate the sensitivity of galaxy shapes t…
Escape from the swamp with spectator
Kazuhiro Kogai, Yuichiro Tada
In the context of string theory, several conjectural conditions have been proposed for low energy effective field theories not to be in swampland, the UV-incomplete class. The rece…
Intrinsic galaxy alignment from angular dependent primordial non-Gaussianity
Kazuhiro Kogai, Takahiko Matsubara, Atsushi J. Nishizawa +1
In this paper, we explore a detectable imprint of massive fields with integer spins , which may be predicted from string theory. It was shown that such a massive non-zero…