170 citations · 791 across the 18 of their papers we have counts for
7 papers · 1 filter
Snowmass2021 Cosmic Frontier White Paper: Dark Matter Physics from Halo Measurements
Keith Bechtol, Simon Birrer, Francis-Yan Cyr-Racine +41
The non-linear process of cosmic structure formation produces gravitationally bound overdensities of dark matter known as halos. The abundances, density profiles, ellipticities, an…
Cosmic Neutrino Background Detection in Large-Neutrino-Mass Cosmologies
James Alvey, Miguel Escudero, Nashwan Sabti +1
The Cosmic Neutrino Background (CNB) is a definite prediction of the standard cosmological model and its direct discovery would represent a milestone in cosmology and neutrino phys…
Addendum: Refined bounds on MeV-scale thermal dark sectors from BBN and the CMB
Nashwan Sabti, James Alvey, Miguel Escudero +2
Very recently, the LUNA collaboration has reported a new measurement of the reaction rate, which plays an important role in the prediction of the primord…
When FIMPs Decay into Neutrinos: The Story
Alexey Boyarsky, Maksym Ovchynnikov, Nashwan Sabti +1
The existence of feebly interacting massive particles (FIMPs) could have significant implications on the effective number of relativistic species in the early Univ…
New Constraints on the Mass of Fermionic Dark Matter from Dwarf Spheroidal Galaxies
James Alvey, Nashwan Sabti, Victoria Tiki +7
Dwarf spheroidal galaxies are excellent systems to probe the nature of fermionic dark matter due to their high observed dark matter phase-space density. In this work, we review, re…
An Extended Analysis of Heavy Neutral Leptons during Big Bang Nucleosynthesis
Nashwan Sabti, Andrii Magalich, Anastasiia Filimonova
Heavy Neutral Leptons (HNLs) are strongly motivated by theory due to their capability of simultaneously explaining the observed phenomena of dark matter, neutrino oscillations and…
Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB
Nashwan Sabti, James Alvey, Miguel Escudero +2
New light states thermally coupled to the Standard Model plasma alter the expansion history of the Universe and impact the synthesis of the primordial light elements. In this work,…