Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Erfani, Encieh"'
We study how the bounds on the abundance of Primordial Black Holes (PBHs) and the constraints to the power spectrum (PS) are modified if a non-standard evolution phase takes place between the end of inflation and the Standard Big Bang (SBB). The cons
Externí odkaz:
http://arxiv.org/abs/2308.04642
We study the merger history of primordial black holes (PBHs) in a scenario where they represent the dominant dark matter component of a typical dwarf galaxies' core. We investigate the possibility of a sequence of collisions resulting in a hierarchic
Externí odkaz:
http://arxiv.org/abs/2205.08906
We study primordial black holes (PBHs) formation in the excursion set theory (EST) in a vast range of PBHs masses with and without confirmed constraints on their abundance. In this work, we introduce a new concept of the first touch in the context of
Externí odkaz:
http://arxiv.org/abs/2101.07812
Autor:
Erfani, Encieh
Publikováno v:
JCAP04(2016)020
We study the possibility that particle production during inflation can source the required power spectrum for dark matter (DM) primordial black holes (PBH) formation. We consider the scalar and the gauge quanta production in inflation models, where i
Externí odkaz:
http://arxiv.org/abs/1511.08470
Autor:
Erfani, Encieh
For the first time, the running of the running of the spectral index $\beta_s$ has been measured by Planck. This parameter is crucial for dark matter Primordial Black Holes (PBHs) formation. We study the PBHs formation in inflation potentials with su
Externí odkaz:
http://arxiv.org/abs/1311.3090
Publikováno v:
JCAP09(2012)006
Axions might play a crucial role for the solution of the strong CP-problem and explanation of cold dark matter in the universe. In addition they may find applications in the formulation of inflationary models for the early universe and can serve as c
Externí odkaz:
http://arxiv.org/abs/1207.1128
Autor:
Drees, Manuel, Erfani, Encieh
A broad range of single field models of inflation are analyzed in light of all relevant recent cosmological data, checking whether they can lead to the formation of long--lived Primordial Black Holes (PBHs) as candidate for dark matter. To that end w
Externí odkaz:
http://arxiv.org/abs/1205.4012
Autor:
Drees, Manuel, Erfani, Encieh
A broad range of single field models of inflation are analyzed in light of all relevant recent cosmological data, checking whether they can lead to the formation of long-lived Primordial Black Holes (PBHs). To that end we calculate the spectral index
Externí odkaz:
http://arxiv.org/abs/1110.6052
Autor:
Drees, Manuel, Erfani, Encieh
Publikováno v:
JCAP 1104:005,2011
We revisit the question whether the running-mass inflation model allows the formation of Primordial Black Holes (PBHs) that are sufficiently long-lived to serve as candidates for Dark Matter. We incorporate recent cosmological data, including the WMA
Externí odkaz:
http://arxiv.org/abs/1102.2340
The study started in a former work about the Dilaton mean field stabilization thanks to the effective potential generated by the existence of massive fermions, is here extended. Three loop corrections are evaluated in addition to the previously calcu
Externí odkaz:
http://arxiv.org/abs/1011.4871