124 citations · 607 across the 17 of their papers we have counts for
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Consistent treatment of flavour-specific neutrino self-interactions in cosmology
Gabriela Barenboim, Marco Drewes, Isabel M. Oldengott
We study the impact of flavour-specific neutrino self-interactions on the CMB anisotropy spectrum and consistently take into account neutrino mixing. Starting from the neutrino qua…
Lepton Flavour Asymmetries and the Mass Spectrum of Primordial Black Holes
Dietrich Bodeker, Florian Kuhnel, Isabel M. Oldengott +1
We study the influence of lepton flavour asymmetries on the formation and the mass spectrum of primordial black holes. We estimate the detectability of their mergers with LIGO/Virg…
Invisible neutrino decay in precision cosmology
Gabriela Barenboim, Joe Zhiyu Chen, Steen Hannestad +3
We revisit the topic of invisible neutrino decay in the precision cosmological context, via a first-principles approach to understanding the cosmic microwave background and large-s…
Inflation meets neutrinos
Gabriela Barenboim, Peter B. Denton, Isabel M. Oldengott
Constraints on inflationary models typically assume only the standard models of cosmology and particle physics. By extending the neutrino sector to include a new interaction with a…
How to relax the cosmological neutrino mass bound
Isabel M. Oldengott, Gabriela Barenboim, Sarah Kahlen +2
We study the impact of non-standard momentum distributions of cosmic neutrinos on the anisotropy spectrum of the cosmic microwave background and the matter power spectrum of the la…
Interacting neutrinos in cosmology: exact description and constraints
Isabel M. Oldengott, Thomas Tram, Cornelius Rampf +1
We consider the impact of neutrino self-interactions described by an effective four-fermion coupling on cosmological observations. Implementing the exact Boltzmann hierarchy for in…
Improved constraints on lepton asymmetry from the cosmic microwave background
Isabel M. Oldengott, Dominik J. Schwarz
A cosmic lepton asymmetry affects the primordial helium abundance and the expansion rate of the early Universe. Both of these e…
Reionization and dark matter decay
Isabel M. Oldengott, Daniel Boriero, Dominik J. Schwarz
Cosmic reionization and dark matter decay can impact observations of the cosmic microwave sky in a similar way. A simultaneous study of both effects is required to constrain unstab…
Boltzmann hierarchy for interacting neutrinos I: formalism
Isabel M. Oldengott, Cornelius Rampf, Yvonne Y. Y. Wong
Starting from the collisional Boltzmann equation, we derive for the first time and from first principles the Boltzmann hierarchy for neutrinos including interactions with a scalar…