Constraints and consequences of reducing small scale structure via large dark matter-neutrino interactions

摘要: Cold dark matter explains a wide range of data on cosmological scales. However, there has been steady accumulation evidence for discrepancies between simulations and observations at scales smaller than galaxy clusters. One promising way to affect structure formation small is relatively strong coupling neutrinos. We construct an experimentally viable, simple, renormalizable model with new interactions neutrinos provide the first discussion how these matter-neutrino neutrino phenomenology. show that addressing scale problems requires asymmetric mass tens MeV. Generating sufficiently large heavy around 100 The mostly sterile but substantial τ component, while three nearly massless are partly sterile. This can be tested by future astrophysical, particle physics, oscillation data. Promising signatures this include alterations energy spectrum flavor content observed from nearby supernova, anomalous effects in oscillations, component