Large power spectrum and primordial black holes in the effective theory of inflation
Sign Up to like & getrecommendations! Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep01(2022)074
Abstract: We study the generation of a large power spectrum, necessary for primordial black hole formation, within the effective theory of single-field inflation. The mechanisms we consider include a transition into a ghost-inflation-like phase and scenarios… read more here.
Keywords: large power; power spectrum; inflation; power ... See more keywords
Cosmic superstrings, metastable strings and ultralight primordial black holes: from NANOGrav to LIGO and beyond
Sign Up to like & getrecommendations! Published in 2024 at "Journal of High Energy Physics"
DOI: 10.1007/jhep02(2025)095
Abstract: While topologically stable cosmic strings are disfavoured by the recent observation of nHz stochastic gravitational waves (GW) by Pulsar Timing Arrays (PTA), e.g., NANOGrav, cosmic metastable strings and superstrings are not. However, because the gravitational… read more here.
Keywords: primordial black; gravitational waves; metastable strings; pta data ... See more keywords
Primordial black hole formation via inverted bubble collapse
Sign Up to like & getrecommendations! Published in 2025 at "Journal of High Energy Physics"
DOI: 10.1007/jhep07(2025)065
Abstract: We propose a novel mechanism of primordial black hole (PBH) formation through inverted bubble collapse. In this scenario, bubbles nucleate sparsely in an incomplete first-order phase transition, such that they remain isolated and do not… read more here.
Keywords: primordial black; black hole; collapse; inverted bubble ... See more keywords
Primordial Black Holes and Gravitational Waves in the U(1)B−L extended inert doublet model: a first-order phase transition perspective
Sign Up to like & getrecommendations! Published in 2024 at "Journal of High Energy Physics"
DOI: 10.1007/jhep12(2024)009
Abstract: We conduct an analysis of a U(1)B−L extended inert doublet model and obtained the parameter space allowing strong first order phase transitions. We show that a large part of the parameter space can cause double… read more here.
Keywords: primordial black; black holes; first order; order phase ... See more keywords
Quantum formation of primordial black holes
Sign Up to like & getrecommendations! Published in 2019 at "General Relativity and Gravitation"
DOI: 10.1007/s10714-019-2587-1
Abstract: We provide a (simplified) quantum description of primordial black holes at the time of their formation. Specifically, we employ the horizon quantum mechanics to compute the probability of black hole formation starting from a simple… read more here.
Keywords: primordial black; quantum formation; black holes; formation primordial ... See more keywords
Primordial black holes and secondary gravitational waves from natural inflation
Sign Up to like & getrecommendations! Published in 2021 at "Nuclear Physics B"
DOI: 10.1016/j.nuclphysb.2021.115480
Abstract: The production of primordial black hole (PBH) dark matter (DM) and the generation of scalar induced secondary gravitational waves by using the enhancement mechanism with a peak function in the noncanonical kinetic term in natural… read more here.
Keywords: gravitational waves; black holes; secondary gravitational; holes secondary ... See more keywords
Primordial black holes could hold the key to dark matter mysteries
Sign Up to like & getrecommendations! Published in 2022 at "Proceedings of the National Academy of Sciences of the United States of America"
DOI: 10.1073/pnas.2211215119
Abstract: As far back as the 1930s, astronomers began to suspect that every galaxy and every cluster of galaxies was surrounded by a massive haze of “dark matter”—an utterly invisible ectoplasm that held these photogenic yet… read more here.
Keywords: matter; primordial black; holes could; dark matter ... See more keywords
Exploring the parameter space of modified supergravity for double inflation and primordial black hole formation
Sign Up to like & getrecommendations! Published in 2021 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac3bd9
Abstract: We study the parameter space of the effective (with two scalars) models of cosmological inflation and primordial black hole (PBH) formation in the modified (R+ R 2) supergravity. Our models describe double inflation, whose first… read more here.
Keywords: formation; primordial black; parameter space; inflation primordial ... See more keywords
Probing primordial black hole scenarios with terrestrial gravitational wave detectors
Sign Up to like & getrecommendations! Published in 2024 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ad5488
Abstract: It is possible that primordial black holes (PBHs) constitute (or constituted) a significant fraction of the energy budget of our Universe. Terrestrial gravitational wave detectors offer the opportunity to test the existence of PBHs in… read more here.
Keywords: primordial black; gravitational wave; wave detectors; wave ... See more keywords
Primordial black holes from string inflation
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/06/034
Abstract: We present a single-field string inflationary model which allows for the generation of primordial black holes in the low mass region where they can account for a significant fraction of the dark matter abundance. The… read more here.
Keywords: holes string; black holes; cosmology; primordial black ... See more keywords
Mechanisms for Primordial Black Hole Production in String Theory
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2018/07/005
Abstract: We consider mechanisms for producing a significant population of primordial black holes (PBHs) within string inspired single field models of inflation. The production of PBHs requires a large amplification in the power spectrum of curvature… read more here.
Keywords: slow roll; production; primordial black; models inflation ... See more keywords