22 citations · 45 across the 5 of their papers we have counts for
5 papers
New Mass Window for Primordial Black Holes as Dark Matter from Memory Burden Effect
Ana Alexandre, Gia Dvali, Emmanouil Koutsangelas
The mass ranges allowed for Primordial Black Holes (PBHs) to constitute all of Dark Matter (DM) are broadly constrained. However, these constraints rely on the standard semiclassic…
Consequences of Multiple Axions in Theories with Dark Yang-Mills Groups
Manuel Ettengruber, Emmanouil Koutsangelas
General consistency requirements of Quantum Gravity demand the existence of one axion per Yang-Mills group. In this work, we consider theories with dark Yang-Mills sectors and inve…
DFSZ-Type Axions and Where to Find Them
Johannes Diehl, Emmanouil Koutsangelas
We systematically calculate the axion-photon coupling for non-minimal DFSZ models. Thereby we can classify every calculated model and study the resulting distributions, relevant fo…
Removing the Cosmological Bound on the Axion Scale in the KSVZ and DFSZ Models
Emmanouil Koutsangelas
It is known for some time that the cosmological bound on the invisible axion scale can be avoided by an early phase of strong QCD. While most approaches rely on theories where the…
Compact Dark Matter Objects via Dark Sectors
Gia Dvali, Emmanouil Koutsangelas, Florian Kuhnel
We propose a novel class of compact dark matter objects in theories where the dark matter consists of multiple sectors. We call these objects -MACHOs. In such theories neither t…