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pro vyhledávání: '"Stamou, Ioanna"'
Autor:
Stamou, Ioanna
In this study, we present an analysis of the fine-tuning required in various inflationary models in order to explain the production of Primordial Black Holes (PBHs). We specifically examine the degree of fine-tuning necessary in two prominent single
Externí odkaz:
http://arxiv.org/abs/2404.14321
Autor:
Kuhnel, Florian, Stamou, Ioanna
A novel methodology for analysing the relation between the energy density in gravitational waves and primordial power spectra is developed. Focusing on scalar-induced gravitational radiation, this methodology is applied to a number of scenarios for t
Externí odkaz:
http://arxiv.org/abs/2404.06547
Autor:
Stamou, Ioanna D.
We investigate the large curvature perturbations which can lead to the formation of primordial black holes (PBHs) in the context of no-scale supergravity. Our study does not depend on any exotic scenario, such as scalar potentials with inflection poi
Externí odkaz:
http://arxiv.org/abs/2404.02295
Autor:
Stamou, Ioanna, Clesse, Sebastien
We investigate the viability of primordial black hole (PBH) formation in the Standard Model (SM) in a scenario that does not rely on specific inflationary features or any exotic physics such as phase transitions or non-minimal coupling to gravity. If
Externí odkaz:
http://arxiv.org/abs/2312.06873
Autor:
Stamou, Ioanna, Clesse, Sebastien
We investigate a mechanism of primordial black hole (PBH) formation that avoids any dependence on specific inflationary features or exotic physics. In this scenario, the required large curvature fluctuations leading to PBH formation are generated aft
Externí odkaz:
http://arxiv.org/abs/2310.04174
Exploring Critical Overdensity Thresholds in Inflationary Models of Primordial Black Holes Formation
Autor:
Stamou, Ioanna D.
In this paper we study the production of Primordial Black Holes (PBHs) from inflation in order to explain the Dark Mater (DM) in the Universe. The evaluation of the fractional PBHs abundance to DM is sensitive to the value of the threshold $\mathrm{\
Externí odkaz:
http://arxiv.org/abs/2306.02758
We revisit the viability of the CMSSM, searching for regions of parameter space that yield a neutralino dark matter density compatible with Planck measurements, as well as LHC constraints including sparticle searches and the mass of the Higgs boson,
Externí odkaz:
http://arxiv.org/abs/2210.16337
We study aspects of inflation and the possibility of enhanced production of primordial black holes (PBHs) and gravitational waves (GWs) in a string-inspired model of two axion fields coupled to Chern-Simons gravity, which results in a running-vacuum-
Externí odkaz:
http://arxiv.org/abs/2206.07963
Autor:
Spanos, Vassilis C., Stamou, Ioanna D.
In this paper we study four concrete models, based on no-scale supergravity with SU(2,1)/SU(2)$\times$ U(1) symmetry. We modify either the K\"ahler potential or the superpotential, which are related to the no-scale theory with this symmetry. In this
Externí odkaz:
http://arxiv.org/abs/2205.05595
Autor:
Stamou, Ioanna D.
Publikováno v:
J.Phys.Conf.Ser. 2105 (2021) 8, 012008
In this paper we present a class of models in order to explain the production of Primordial Black Holes (PBHs) and Gravitational Waves (GWs) in the Universe. These models are based on no-scale theory. By breaking the SU(2,1)/SU(2)$\times$U(1) symmetr
Externí odkaz:
http://arxiv.org/abs/2111.14190