4 papers
Soft displaced leptons at the LHC
Freya Blekman, Nishita Desai, Anastasiia Filimonova +2
Soft displaced leptons are representative collider signatures of compressed dark sectors with feeble couplings to the standard model. Prime targets are dark matter scenarios where…
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…
Probing dark sectors with long-lived particles at BELLE II
Anastasiia Filimonova, Ruth Schäfer, Susanne Westhoff
We propose a new search for light scalar singlets in rare meson decays. For tiny interactions, the scalar is long-lived at detector scales and decays into displaced pairs of lepton…
Long live the Higgs portal!
Anastasiia Filimonova, Susanne Westhoff
In Higgs portal models of fermion dark matter, scalar couplings are unavoidably suppressed by strong bounds from direct detection experiments. As a consequence, thermal dark matter…