148 citations · 683 across the 16 of their papers we have counts for
16 papers
Gravitational wave spectrum from kinks on infinite cosmic superstrings with Y-junctions
Yuka Matsui, Koichiro Horiguchi, Daisuke Nitta +1
We calculate the gravitational wave (GW) background spectra from kink propagation and kink-kink collisions on infinite cosmic superstrings. We take into account two characteristics…
BRS structure of Simple Model of Cosmological Constant and Cosmology
Taisaku Mori, Daisuke Nitta, Shin'ichi Nojiri
In arXiv:1601.02203, a simple model has been proposed in order to solve one of the problems related with the cosmological constant. The model is given by a topological field theory…
Improved calculation of the gravitational wave spectrum from kinks on infinite cosmic strings
Yuka Matsui, Koichiro Horiguchi, Daisuke Nitta +1
Gravitational wave observations provide unique opportunities to search for cosmic strings. One of the strongest sources of gravitational waves is discontinuities of cosmic strings,…
Test of the Einstein equivalence principle with spectral distortions in the cosmic microwave background
Shun Arai, Daisuke Nitta, Hiroyuki Tashiro
The Einstein Equivalence Principle~(EEP) can be verified by the measurement of the spectral distortions of the Cosmic Microwave Background (CMB). The existence of energy-dependency…
Modular invariant inflation
Tatsuo Kobayashi, Daisuke Nitta, Yuko Urakawa
Modular invariance is a striking symmetry in string theory, which may keep stringy corrections under control. In this paper, we investigate a phenomenological consequence of the mo…
Shadows of Multi-Black Holes: Analytic Exploration
Akifumi Yumoto, Daisuke Nitta, Takeshi Chiba +1
Shadows of multi-black holes have structures distinct from the mere superposition of the shadow of a single black hole: the eyebrow-like structures outside the main shadows and the…