Zobrazeno 1 - 10
of 2 728
pro vyhledávání: '"Curvaton"'
Autor:
Tokeshi, Koki
The curvaton paradigm can realise a part of or all the observed curvature perturbation. Based on the stochastic formalism of inflation and closed-form exact distributions therein, the distribution of the curvature perturbation is presented in an anal
Externí odkaz:
http://arxiv.org/abs/2411.15849
The Standard Model of particle physics does not explain the origin of the universe's baryon asymmetry or its primordial fluctuations. The Affleck-Dine mechanism is a well-motivated scenario for generating the baryon asymmetry through the post-inflati
Externí odkaz:
http://arxiv.org/abs/2410.13712
The expected improvements in the precision of inflationary physics observables including the scalar spectral index $n_{s}$ and the tensor-to-scalar ratio $r$ will reveal more than just the viability of a particular model of inflation. In the presence
Externí odkaz:
http://arxiv.org/abs/2409.08279
We discuss a mechanism of primordial black hole (PBH) formation that does not require specific features in the inflationary potential, revisiting previous literature. In this mechanism, a light spectator field evolves stochastically during inflation
Externí odkaz:
http://arxiv.org/abs/2409.12950
The mimetic gravity theory is one of the interesting modified gravity theories, which aims to unify the matter component of our universe within the power of gravity. The mimetic-like theory can also be responsible for primordial perturbations product
Externí odkaz:
http://arxiv.org/abs/2405.06921
Autor:
Yu, Yan-Heng, Wang, Sai
Publikováno v:
Physical Review D 109, 083501 (2024)
We propose a new model to generate large anisotropies in the scalar-induced gravitational wave (SIGW) background via sound speed resonance in the inflaton-curvaton mixed scenario. Cosmological curvature perturbations are not only exponentially amplif
Externí odkaz:
http://arxiv.org/abs/2310.14606
The stochastic gravitational wave background (SGWB) recently detected by the PTA collaborations could be the gravitational waves (GWs) induced by curvature perturbations. However, primordial black holes (PBHs) might be overproduced if the SGWB is exp
Externí odkaz:
http://arxiv.org/abs/2309.11398
We investigate the production of primordial black holes (PBHs) in a mixed inflaton-curvaton scenario with a quadratic curvaton potential, assuming the curvaton is in de Sitter equilibrium during inflation with $\langle \chi\rangle =0$. In this setup,
Externí odkaz:
http://arxiv.org/abs/2307.03078
We revisit the growth of curvature perturbations in non-minimal curvaton scenario with a non-trivial field metric $\lambda(\phi)$ where $\phi$ is an inflaton field, and incorporate the effect from the non-uniform onset of curvaton's oscillation in te
Externí odkaz:
http://arxiv.org/abs/2305.12325
Autor:
Anish Ghoshal, Abhishek Naskar
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 10, Pp 1-13 (2024)
Abstract We investigate the non-perturbatively generated axion-like particle (ALP) potential, involving fermions in the dark sector that couple to the ALP, in an early universe cosmological inflationary stage with the ALP being a spectator field. The
Externí odkaz:
https://doaj.org/article/af7553a96974434ab59e8fd31df38580
