42 papers
Single-wave solutions of the neutrino fast flavor system. Part II. Weak instabilities and their resonant behavior
Damiano F. G. Fiorillo, Georg G. Raffelt
Flavor instabilities in dense neutrino media trigger exponential growth of flavor waves, yet their nonlinear saturation remains poorly understood. We examine a simple proxy for thi…
Single-wave solutions of the neutrino fast flavor system. Part I. Mechanical properties
Damiano F. G. Fiorillo, Georg G. Raffelt
A dense neutrino plasma can exhibit collective flavor evolution caused by neutrino--neutrino refraction. Recently, a new class of exact nonlinear inhomogeneous solutions was discov…
Millicharged Particle Constraints from Asymptotic Giant Branch Stars
Damiano F. G. Fiorillo, Giuseppe Lucente, Jeremy Sakstein +1
We investigate the effect of millicharged particles (MCPs) with electric charge and mass on the late-stage evolution phases of low-mass stars in globular clusters.…
Neutrino-antineutrino superfluidity
Damiano F. G. Fiorillo, Georg G. Raffelt, Günter Sigl
Despite their feeble interactions, dense astrophysical neutrinos can behave collectively, exchanging flavor through waves of the neutrino plasma. Can collective interactions also i…
Neutron Star Bounds on Muonic Fifth Forces from Picometer to Kilometer Scales
Damiano F. G. Fiorillo, Alessandro Lella, Georg G. Raffelt +2
Experimental searches for fifth forces coupled to muons are fundamentally limited by the scarcity of muons in ordinary matter, whereas neutron stars contain abundant muon populatio…
Production of Leptophilic Bosons in Ultradegenerate Relativistic Matter
Damiano F. G. Fiorillo, Alessandro Lella, Georg G. Raffelt +2
Neutron stars (NSs) are powerful factories for new particles with masses up to the 100 keV range. These compact stars contain significant populations of charged particles, notably…