Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Rezazadeh, Kazem"'
Publikováno v:
Mon.Not.Roy.Astron.Soc. 534 (2024) 3, 2848-2857
Using the spherical collapse approach, we investigate the impact of two alternative dark matter models, each characterized by distinct non-zero equations of state, one constant and the other time dependent on the nonlinear regime. Specifically, we co
Externí odkaz:
http://arxiv.org/abs/2311.15083
Publikováno v:
Eur. Phys. J. C 84, 80 (2024)
We study the inflationary scenario in the Tsallis entropy-based cosmology. The Friedmann equations in this setup can be derived by using the first law of thermodynamics. To derive the relations of the power spectra of the scalar and tensor perturbati
Externí odkaz:
http://arxiv.org/abs/2307.11437
Autor:
Ashoorioon, Amjad, Rezazadeh, Kazem
Publikováno v:
JCAP07 (2023) 028
Light massive preheat fields acquire a non-vanishing dispersion during parametric resonance from their quantum particle production. This in turn will modify the inflaton potential, which in some cases can induce a transient period of acceleration. We
Externí odkaz:
http://arxiv.org/abs/2301.06598
Publikováno v:
Phys. Lett. B 835 (2022) 137542. Phys. Lett. B 835 (2022) 137542. Phys. Lett. B 835 (2022) 137542. Phys. Lett. B 835 (2022) 137542
Releasing the 12.5-year pulsar timing array data, the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has recently reported the evidence for a stochastic common-spectrum which would herald the detection of a stochastic gravita
Externí odkaz:
http://arxiv.org/abs/2202.01131
Publikováno v:
Eur. Phys. J. C 82, 758 (2022)
We study the non-Gaussianity and secondary Gravitational Waves (GWs) in the process of the Primordial Black Holes (PBHs) production from inflation. In our work, we focus on the $\alpha$-attractor inflation model in which a tiny bump in the inflaton p
Externí odkaz:
http://arxiv.org/abs/2110.01482
Publikováno v:
ApJ 915, 118 (2021)
We study the possibility of the Primordial Black Holes (PBHs) formation with the aim of finding a considerable fraction of Dark Matter (DM), using the gravitationally enhanced friction mechanism which arises from a nonminimal derivative coupling betw
Externí odkaz:
http://arxiv.org/abs/2107.08048
Publikováno v:
JCAP10(2021)018
We study the process of the Primordial Black Holes (PBHs) production in the novel framework, namely $\alpha$-attractor Galileon inflation (G-inflation) model. In our framework, we take the Galileon function as $G(\phi)=G_{I}(\phi)\left(1+G_{II}(\phi)
Externí odkaz:
http://arxiv.org/abs/2107.07620
Akademický článek
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Autor:
Ashoorioon, Amjad, Rezazadeh, Kazem
Publikováno v:
JHEP 07 (2020) 244
We show how in a matrix inflationary model in which there is a non-minimal coupling between the matrix inflatons and gravity --hence dubbed Non-$\MM$-flation-- some of the disadvantages of the minimal model can be avoided. In particular, the number o
Externí odkaz:
http://arxiv.org/abs/1909.09806
Autor:
Teimoori, Zeinab1 (AUTHOR), Rezazadeh, Kazem2 (AUTHOR) kazem.rezazadeh@ipm.ir, Rostami, Abasat3 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Jan2024, Vol. 84 Issue 1, p1-18. 18p.
