3 papers
astro-ph.CO2020
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…
astro-ph.CO2020
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…
astro-ph.CO2018
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…