New thresholds for primordial black hole formation during the QCD phase transition

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

Sobrinho, JLG (Autor) Outra; Augusto, P (Autor) FMUP; Goncalves, AL (Autor) Outra

Revista

Título: Monthly Notices of the Royal Astronomical Society

Vol. 463

Páginas: 2348-2357

ISSN: 0035-8711

Editora: Oxford University Press

Indexação

ISI Web of Knowledge - 9 Citações

Scopus - 9 Citações

Outras Informações

ID Authenticus: P-00M-GPK

DOI: 10.1093/mnras/stw2138

Abstract (EN): 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 quantum chromodynamics (QCD) phase transition epoch within three different models: bag model (BM), lattice fit model, and crossover model. We found that the reduction on the background value of delta(c) can be as high as 77 per cent (BM), which might imply a similar to 10(-10) probability of PBHs forming at the QCD epoch.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 10