Results 71 to 80 of about 38,497 (193)

Primordial Black Holes

open access: yes, 2015
2014 Fermi Symposium proceedings - eConf C141020 ...
MacGibbon, Jane H   +5 more
openaire   +2 more sources

Primordial Black Holes and Gravitational Waves in the U(1) B−L extended inert doublet model: a first-order phase transition perspective

open access: yesJournal of High Energy Physics
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 first-order phase transitions.
Indra Kumar Banerjee   +2 more
doaj   +1 more source

E-models of inflation and primordial black holes

open access: yesFrontiers in Physics, 2022
We propose and study the new (generalized) E-type α-attractor models of inflation, in order to include formation of primordial black holes (PBHs). The inflaton potential has a near-inflection point where slow-roll conditions are violated, thus leading to
Daniel Frolovsky   +4 more
doaj   +1 more source

Axion Black Hole Solution in Non‐Metricity Gravity

open access: yesFortschritte der Physik, Volume 74, Issue 2, February 2026.
Abstract A static, spherically symmetric black hole solution in symmetric teleparallel (non‐metricity) gravity sourced by an axion field is constructed. Starting from the modified field equations, exact configurations are obtained characterized by the mass M$M$ and an axion–geometry coupling β$\beta$, with temporal metric function A(r)=1−2Mr+βr$A(r)=1-\
A. Eid, G.G.L. Nashed
wiley   +1 more source

Antimatter from primordial black holes [PDF]

open access: yes, 2002
Antiprotons and antideuterons are considered as probes to look for primordial black holes in our Galaxy. I give a brief overview of the latest developments on the subject.Comment: proceedings of the XIVth Rencontres de Blois : Matter-Antimatter ...
Barrau, Aurelien
core   +2 more sources

Evolution of Primordial Black Holes in Loop Quantum Gravity

open access: yes, 2011
In this work, we study the evolution of Primordial Black Holes within the context of Loop Quantum Gravity. First we calculate the scale factor and energy density of the universe for different cosmic era and then taking these as inputs we study evolution ...
B. Nayak   +4 more
core   +1 more source

Erving Goffman at 100: A Chameleon Seen as a Rorschach Test within a Kaleidoscope

open access: yesSymbolic Interaction, Volume 49, Issue 1, Page 3-47, February 2026.
The 100th anniversary of Erving Goffman's birth was in 2022. Drawing on his work, the Goffman archives, the secondary literature, and personal experiences with him and those in his university of Chicago cohort, I reflect on some implications of his work and life, and the inseparable issues of understanding society.
Gary T. Marx
wiley   +1 more source

Primordial Black Holes and Gravitational Memory [PDF]

open access: yesProgress of Theoretical Physics Supplement, 1999
We discuss the various ways in which primordial black holes may have formed in the early Universe and how the effects of such black holes can be used to place constraints on cosmological models. We show that such constraints may be severely modified if the value of the gravitational "constant" G varies with cosmological epoch, a possibility which ...
Carr, B. J., Goymer, C. A.
openaire   +2 more sources

Search for Primordial Black Hole Evaporation with VERITAS

open access: yes, 2017
Primordial black holes are black holes that may have formed from density fluctuations in the early universe. It has been theorized that black holes slowly evaporate.
Archambault, Simon
core   +1 more source

High‐Energy‐Density Aqueous Zinc‐Ion Batteries: Recent Progress, Design Strategies, Challenges, and Perspectives

open access: yesAdvanced Materials, Volume 37, Issue 48, December 3, 2025.
Strategies achieving high‐energy‐density aqueous zinc‐ion batteries are summarized and analyzed from both their separate advancements and the integrated effectiveness in this review. Then, perspectives are given for valuable guidance for further development of high‐energy‐density aqueous zinc‐ion batteries.
Mingcong Tang   +4 more
wiley   +1 more source

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