470 citations · 1.1k across the 31 of their papers we have counts for
6 papers · 1 filter
A speed limit on tachyon fields from cosmological and fine-structure data
J. D. F. Dias, Nils Schöneberg, Léo Vacher +2
The rolling tachyon is a non-canonical scalar field model well motivated in string theory which naturally predicts variations of the fine-structure constant. Such variations can in…
The mass effect -- Variations of the electron mass and their impact on cosmology
Nils Schöneberg, Léo Vacher
We summarize and explain the current status of time variations of the electron mass in cosmology, showing that such variations allow for significant easing of the Hubble tension, f…
Euclid preparation. Sensitivity to neutrino parameters
Euclid Collaboration, M. Archidiacono, J. Lesgourgues +246
The Euclid mission of the European Space Agency will deliver weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model…
Cosmological probes of Dark Radiation from Neutrino Mixing
Itamar J. Allali, Daniel Aloni, Nils Schöneberg
Models of stepped dark radiation have recently been found to have an important impact on the anisotropies of the cosmic microwave background, aiding in easing the Hubble tension. I…
Incompatibility of fine-structure constant variations at recombination with local observations
Léo Vacher, Nils Schöneberg
Some attempts of easing the critical Hubble tension present in modern cosmology have resorted to using variations of fundamental constants, such as the fine-structure constant, at…
The 2024 BBN baryon abundance update
Nils Schöneberg
We revisit the state of the light element abundances from big bang nucleosynthesis in early 2024 with particular focus on the derived baryon abundance. We find that the largest dif…