168 citations · 1.6k across the 28 of their papers we have counts for
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Signatures of a hidden cosmic microwave background
Joerg Jaeckel, Javier Redondo, Andreas Ringwald
If there is a hidden photon -- i.e. a light abelian gauge boson in the hidden sector -- its kinetic mixing with the standard photon can produce a hidden cosmic microwave background…
Probing Neutrino Dark Energy with Extremely High-Energy Cosmic Neutrinos
Andreas Ringwald, Lily Schrempp
Recently, a new non-Standard Model neutrino interaction mediated by a light scalar field was proposed, which renders the big-bang relic neutrinos of the cosmic neutrino background…
Strongly Interacting Neutrinos as the Highest Energy Cosmic Rays: A Quantitative Analysis
Markus Ahlers, Andreas Ringwald, Huitzu Tu
Scattering processes in the cosmic microwave background limit the propagation of ultra high energy charged particles in our Universe. For extragalactic proton sources resonant phot…
Is it possible to tell the difference between fermionic and bosonic hot dark matter?
Steen Hannestad, Andreas Ringwald, Huitzu Tu +1
We study the difference between thermally produced fermionic and bosonic hot dark matter in detail. In the linear regime of structure formation, their distinct free-streaming behav…
Cosmic rays at ultra high energies (Neutrinos!)
Markus Ahlers, Andreas Ringwald, Huitzu Tu
Resonant photopion production with the cosmic microwave background predicts a suppression of extragalactic protons above the famous Greisen-Zatsepin-Kuzmin cutoff at about E_{GZK}…
Z-bursts from the Virgo cluster
Andreas Ringwald, Thomas J. Weiler, Yvonne Y. Y. Wong
Resonant annihilation of ultra-high energy cosmic neutrinos (UHECnu) on the cosmic neutrino background (CnuB) into Z bosons--the Z-burst mechanism--and its associated absorption an…