3 papers
hep-th2025
Response of Kaluza-Klein mass spectrum to deformations of rugby-ball compact space
Hajime Otsuka, Yutaka Sakamura
We investigate the response of the Kaluza-Klein (KK) mass spectrum to various deformations of the rugby-ball background in 6-dimensional supergravity. We derived the mode equations…
hep-th2024
Nambu-Goldstone Modes in Magnetized Extra Dimensions
Takuya Hirose, Hajime Otsuka, Koji Tsumura +1
We consider a gauge theory on with background magnetic fluxes. We show that a theory including arbitrary fluxes can always be studied in a theory involving o…
hep-th2024
Induced moduli oscillation by radiation and space expansion in a higher-dimensional model
Hajime Otsuka, Yutaka Sakamura
We investigate the cosmological expansion of the 3D space in a 6D model compactified on a sphere, beyond the 4D effective theory analysis. We focus on a case that the initial tempe…