165 citations · 2.5k across the 85 of their papers we have counts for
5 papers · 1 filter
Dark baryon from pure Yang-Mills theory and its GW signature from cosmic strings
Masaki Yamada, Kazuya Yonekura
We point out that SO() pure Yang-Mills theory provides a candidate for dark matter (DM) without the explicit need to impose any additional symmetry. The DM candidate is a parti…
Can baryon asymmetry be explained by a large initial value before inflation?
Kai Murai, Fuminobu Takahashi, Masaki Yamada +1
We show that the baryon asymmetry of the Universe cannot be explained by a large initial value before inflation because it inevitably predicts correlated baryon isocurvature pertur…
Quantum decay of scalar and vector boson stars and oscillons into gravitons
Kazunori Nakayama, Fuminobu Takahashi, Masaki Yamada
We point out that a soliton such as an oscillon or boson star inevitably decays into gravitons through gravitational interactions. These decay processes exist even if there are no…
Stochastic dynamics of multi-waterfall hybrid inflation and formation of primordial black holes
Yuichiro Tada, Masaki Yamada
We show that a hybrid inflation model with multiple waterfall fields can result in the formation of primordial black hole (PBH) with an astrophysical size, by using an advanced alg…
On the primordial black hole formation in hybrid inflation
Yuichiro Tada, Masaki Yamada
We revisit the scenario of primordial black hole (PBH) formation from large curvature perturbations generated during the waterfall phase transition in hybrid inflation models. In a…