New thresholds for Primordial Black Hole formation during the QCD phase transition

Abstract

Primordial Black Holes (PBHs) might have formed in the early Universe as a consequence of the collapse of density fluctuations with an amplitude above a critical value ${\delta }_c$: the formation threshold. Although for a radiation-dominated Universe ${\delta }_c$ remains constant, if the Universe experiences some dust-like phases (e.g. phase transitions) ${\delta }_c$ might decrease, improving the chances of PBH formation. We studied the evolution of ${\delta }_c$ during the QCD phase transition epoch within three different models: Bag Model (BM), Lattice Fit Model (LFM), and Crossover Model (CM). We found that the reduction on the background value of ${\delta }_c$ can be as high as $77\%$ (BM), which might imply a $\sim 10^{-10}$ probability of PBHs forming at the QCD epoch.

arXiv comment11 pages, 8 figures and 3 tables

References in corpus (31)

• Planck 2013 results. XVI. Cosmological parameters
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• New cosmological constraints on primordial black holes
• Limits on the Macho Content of the Galactic Halo from the EROS-2 Survey of the Magellanic Clouds
• The QCD transition temperature: results with physical masses in the continuum limit
• The Cold Dark Matter Density Perturbation
• Primordial Black Holes
• The QCD thermal phase transition in the presence of a small chemical potential
• Threshold of primordial black hole formation
• Dynamics of Primordial Black Hole Formation
• Computations of primordial black hole formation
• Primordial black hole formation in the early universe: critical behaviour and self-similarity
• Primordial black hole formation in the radiative era: investigation of the critical nature of the collapse
• QCD Thermodynamics with Three Flavors of Improved Staggered Quarks
• Primordial Black Hole Formation during First-Order Phase Transitions
• Phase transitions in the early and the present Universe
• Curvature profiles as initial conditions for primordial black hole formation
• Amplification of Cosmological Inhomogeneities by the QCD Transition
• Primordial Black Holes as a Probe of Cosmology and High Energy Physics
• The first second of the Universe
• Accurate results for primordial black holes from spectra with a distinguished scale
• Primordial Black Holes: sirens of the early Universe
• Primordial Black Holes from inflationary models with and without Broken Scale Invariance
• Evolution of gravitational waves through the cosmological QCD transition
• Peaks above the Harrison-Zel'dovich spectrum due to the Quark-Gluon to Hadron Transition
• Classicality of primordial fluctuations and Primordial Black Holes
• Kaon Interferometry as Signal for the QCD Phase Transition at RHIC
• Direct detection of Black Holes via electromagnetic radiation

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