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Collisional production of sterile neutrinos via secret interactions and cosmological implications
Alessandro Mirizzi, Gianpiero Mangano, Ofelia Pisanti +1
Secret interactions among sterile neutrinos have been recently proposed as an escape-route to reconcile eV sterile neutrino hints from short-baseline anomalies with cosmological ob…
Unveiling secret interactions among sterile neutrinos with big-bang nucleosynthesis
Ninetta Saviano, Ofelia Pisanti, Gianpiero Mangano +1
Short-baseline neutrino anomalies suggest the existence of low-mass ( m \sim O(1)~eV) sterile neutrinos ν_s. These would be efficiently produced in the early universe by oscillatio…
Strongest model-independent bound on the lifetime of Dark Matter
Benjamin Audren, Julien Lesgourgues, Gianpiero Mangano +2
Dark Matter is essential for structure formation in the late Universe so it must be stable on cosmological time scales. But how stable exactly? Only assuming decays into relativist…
Probing nuclear rates with Planck and BICEP2
Eleonora Di Valentino, Carlo Gustavino, Julien Lesgourgues +4
Big Bang Nucleosynthesis (BBN) relates key cosmological parameters to the primordial abundance of light elements. In this paper, we point out that the recent observations of Cosmic…
Damping the neutrino flavor pendulum by breaking homogeneity
Gianpiero Mangano, Alessandro Mirizzi, Ninetta Saviano
The most general case of self-induced neutrino flavor evolution is described by a set of kinetic equations for a dense neutrino gas evolving both in space and time. Solutions of th…