120 citations · 467 across the 11 of their papers we have counts for
9 papers · 1 filter
Neutrino Self-Interactions
Jasper Hasenkamp
We propose a theory that equips the active neutrinos with interactions among themselves that are at least three orders of magnitude stronger than the weak interaction. We introduce…
LHC constraints on Gravitino Dark Matter
Alexandre Arbey, Marco Battaglia, Laura Covi +2
Gravitino Dark Matter represents a compelling scenario in Supersymmetry, which brings together a variety of data from cosmology and collider physics. We discuss the constraints obt…
Tight bonds between sterile neutrinos and dark matter
Torsten Bringmann, Jasper Hasenkamp, Joern Kersten
Despite the astonishing success of standard CDM cosmology, there is mounting evidence for a tension with observations at small and intermediate scales. We introduce a simple mod…
NMSSM with Gravitino Dark Matter to be tested at LHC
Jasper Hasenkamp, Martin Wolfgang Winkler
We present a solution to the gravitino problem, which arises in the NMSSM, allowing for sparticle spectra from ordinary gravity-mediated supersymmetry breaking with weak-scale grav…
Dark radiation from particle decay: cosmological constraints and opportunities
Jasper Hasenkamp, Jörn Kersten
We study particle decay as the origin of dark radiation. After elaborating general properties and useful parametrisations we provide model-independent and easy-to-use constraints f…
Dark radiation from the axino solution of the gravitino problem
Jasper Hasenkamp
Current observations of the cosmic microwave background could confirm an increase in the radiation energy density after primordial nucleosynthesis but before photon decoupling. We…