624 citations · 9.9k across the 108 of their papers we have counts for
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The Not-So-Sterile 4th Neutrino: Constraints on New Gauge Interactions from Neutrino Oscillation Experiments
Joachim Kopp, Johannes Welter
Sterile neutrino models with new gauge interactions in the sterile sector are phenomenologically interesting since they can lead to novel effects in neutrino oscillation experiment…
Flavor and CP violation in Higgs decays
Joachim Kopp, Marco Nardecchia
Flavor violating interactions of the Higgs boson are a generic feature of models with extended electroweak symmetry breaking sectors. Here, we investigate CP violation in these int…
Decoherence by wave packet separation and collective neutrino oscillations
Evgeny Akhmedov, Joachim Kopp, Manfred Lindner
In dense neutrino backgrounds present in supernovae and in the early Universe, neutrino oscillations may exhibit complex collective phenomena, such as synchronized oscillations, bi…
Disentangling Flavor Violation in the Top-Higgs Sector at the LHC
Admir Greljo, Jernej F. Kamenik, Joachim Kopp
We study the LHC phenomenology of flavor changing Yukawa couplings between top quark, Higgs boson, and either an up or charm quark. Such or couplings arise for instance…
Light sterile neutrino sensitivity at the nuSTORM facility
D. Adey, S. K. Agarwalla, C. M. Ankenbrandt +109
A facility that can deliver beams of electron and muon neutrinos from the decay of a stored muon beam has the potential to unambiguously resolve the issue of the evidence for light…
Loopy Constraints on Leptophilic Dark Matter and Internal Bremsstrahlung
Joachim Kopp, Lisa Michaels, Juri Smirnov
A sharp and spatially extended peak in an astrophysical gamma ray spectrum would provide very strong evidence for the existence of dark matter (DM), given that there are no known a…