Results 71 to 80 of about 38,917 (207)
GUT-Scale Primordial Black Holes: Consequences and Constraints
, 2009 A population of very light primordial black holes which evaporate before nucleosynthesis begins is unconstrained unless the decaying black holes leave stable relics.
A. D. Sakharov +7 more
core +1 more source
Inflationary preheating and primordial black holes [PDF]
, 2000 Preheating after inflation may over-produce primordial black holes (PBH's) in many regions of parameter space. As an example we study two-field models with a massless self-interacting inflaton, taking into account second order field and metric ...
Bassett, Bruce A., Tsujikawa, Shinji
core +2 more sources
Renormalized primordial black holes
Journal of Cosmology and Astroparticle PhysicsAbstract The formation of primordial black holes in the early universe may happen through the collapse of large curvature perturbations generated during a non-attractor phase of inflation or through a curvaton-like dynamics after inflation. The fact that such small-scale curvature perturbation is typically non-Gaussian leads to the
G. Franciolini +4 more
openaire +4 more sources
European Physical Journal C: Particles and Fields, 2021 We propose an extension of the scalaron-Higgs model by a non-minimal coupling of the Standard Model Higgs boson to the quadratic Ricci scalar resulting in a Higgs-dependent scalaron mass.
Anirudh Gundhi, Christian F. Steinwachs
doaj +1 more source
Primordial black holes and the string swampland [PDF]
Physical Review D, 2018 4 pages; v2: minor modifications, added references, published ...
Kawasaki, Masahiro, Takhistov, Volodymyr
openaire +2 more sources
Primordial black holes from primordial voids
Physical Review D8+4 pages, 6 figures. Fix some typos, added references, extended supplemental material with extra details on the numerical aspects (formalism, initial data, code tests, etc)
Cristian Joana, Zi-Yan Yuwen
openaire +2 more sources
Computations of primordial black-hole formation [PDF]
Classical and Quantum Gravity, 2005 Results are presented from general relativistic numerical computations of primordial black-hole formation during the radiation-dominated era of the universe. Growing-mode perturbations are specified within the linear regime and their subsequent evolution is followed as they become nonlinear. We use a spherically symmetric Lagrangian code and study both
MUSCO I, Miller, John, REZZOLLA L.
openaire +3 more sources
Primordial seeds of supermassive black holes
, 2012 Supermassive black holes exist in the centers of galaxies, including Milky Way, but there is no compelling theory of their formation. Furthermore, observations of quasars imply that supermassive black holes have already existed at some very high ...
Kawasaki, Masahiro +2 more
core +1 more source
Relativistic Images in Randall-Sundrum II Braneworld Lensing [PDF]
, 2010 In this paper, we explore the properties of gravitational lensing by black holes in the Randall-Sundrum II braneworld. We use numerical techniques to calculate lensing observables using the Tidal Reissner-Nordstrom (TRN) and Garriga-Tanaka metrics to ...
A. Petter +6 more
core +3 more sources
Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source