80 citations · 1.2k across the 83 of their papers we have counts for
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How collective modes terminate in the dispersion relation of neutrino plasmas
Damiano F. G. Fiorillo
Neutrino plasmas support flavor waves, collective oscillations of flavor, that neutrinos can resonantly emit or absorb when they fulfill the Cherenkov condition. For massless neutr…
Collective flavor conversion in dense neutrino plasmas
Damiano F. G. Fiorillo
Compact transient sources, such as supernovae (SNe) and neutron star mergers (NSMs), host a population of thermal neutrinos in their inner cores, which decouple from the dense matt…
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 Meter Scales
Damiano F. G. Fiorillo, Alessandro Lella, Georg G. Raffelt +2
Testing muonic fifth forces is difficult because muons are scarce in ordinary matter. However, they are abundant in neutron stars. We show that this population responds coherently…
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 amounts of protons, electrons, and muons.…
Magnetic Turbulence Boosts Supernova Signals of Axion-Photon Conversion
Damiano F. G. Fiorillo, Ángel Gil Muyor, Georg G. Raffelt +1
Magnetic fields between a supernova (SN) and Earth convert axions into gamma rays. The absence of such a signal in coincidence with SN 1987A neutrinos, using the coherent Milky Way…
Millicharged Particle Production During Late-Stage Stellar Evolution
Damiano F. G. Fiorillo, Giuseppe Lucente, Jeremy Sakstein +1
Stars are natural sources of feebly interacting particles, including putative particles with mass and electric charge . The emission of such millicharged particles (MCPs)…
The Black Hole Mass Gap as a New Probe of Millicharged Particles
Damiano F. G. Fiorillo, Giuseppe Lucente, Jeremy Sakstein +2
We investigate the impact of millicharged particles (MCPs) on massive stars undergoing pulsational pair-instability supernovae and on the location of the lower edge of the black ho…
Flavomons in Matter Gradients: Ray Tracing and Amplitude Evolution
Damiano F. G. Fiorillo, Georg G. Raffelt
Flavor instabilities develop in neutrino plasmas through the emission of flavomons, the quanta of flavor waves. Matter gradients can sweep flavomons across the unstable wave-number…
Quasi-linear theory of fast flavor instabilities in homogeneous environments
Damiano F. G. Fiorillo, Georg G. Raffelt
Dense neutrino plasmas can develop instabilities that drive collisionless flavor exchange, equivalent to the emission of flavomons, the quanta of flavor waves. We treat these waves…
The COSMIC WISPers White Paper: The physics case for Weakly Interacting Slim Particles
Ariel Arza, Deniz Aybas, Shyam Balaji +124
Axions and other very weakly interacting slim particles (WISPs), with masses below 1 GeV, arise naturally in many extensions of the Standard Model of particle physics. In particula…
Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments
Michele Cicoli, Francesco D'Eramo, Luca Di Luzio +18
The meV mass range has emerged as a focal point in axion physics, where advances in theory, cosmology, astrophysics, and experimental techniques converge. Axions in this mass range…
The ubiquitous flavor pendulum
Damiano F. G. Fiorillo, Georg G. Raffelt
A system of classical interacting spins can develop collective instabilities which, in the nonlinear regime, mimic the motion of a gyroscopic pendulum. Known as the flavor pendulum…
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…
Stripped-Envelope Supernovae for QCD Axion Detection
Francisco R. Candón, Damiano F. G. Fiorillo, Ángel Gil Muyor +3
QCD axions would be copiously produced in the proto-neutron star formed in a core-collapse supernova (SN). After escaping, they would convert into gamma rays in the Galactic magnet…
Small Progenitors, Large Couplings: Type Ic Supernova Constraints on Radiatively Decaying Particles
Francisco R. Candón, Damiano F. G. Fiorillo, Hans-Thomas Janka +2
Supernova (SN) 1987A provides classic bounds on gamma-ray flashes from the radiative decay of sub-GeV particles, but the latter may decay so rapidly as to be shielded by the stella…
Axion-photon conversion in transient compact stars: Systematics, constraints, and opportunities
Damiano F. G. Fiorillo, Ángel Gil Muyor, Hans-Thomas Janka +2
We study magnetic conversion of ultra-relativistic axion-like particles (ALPs) into photons in compact-star environments, focusing on the hot, transient conditions of core-collapse…
Lepton number crossings are insufficient for flavor instabilities
Damiano F. G. Fiorillo, Georg G. Raffelt
In dense neutrino environments, the mean field of flavor coherence can develop instabilities. A necessary condition is that the flavor lepton number changes sign as a function of e…
Neutrino-Mass-Driven Instabilities as the Earliest Flavor Conversion in Supernovae
Damiano F. G. Fiorillo, Hans-Thomas Janka, Georg G. Raffelt
Collective neutrino flavor conversions in core-collapse supernovae (SNe) begin with instabilities, initially triggered when the dominant outflow concurs with a small antineut…
Leading bounds on micro- to picometer fifth forces from neutron star cooling
Damiano F. G. Fiorillo, Alessandro Lella, Ciaran A. J. O'Hare +1
The equivalence principle and the inverse-square law of gravity could be violated at short distances ( to meters) by scalars sporting a coupling to nucleo…
Dispersion relation of the neutrino plasma: Unifying fast, slow, and collisional instabilities
Damiano F. G. Fiorillo, Georg G. Raffelt
In neutrino-dense astrophysical environments, these particles exchange flavor through a coherent weak field, forming a collisionless neutrino plasma with collective flavor dynamics…
Supernova production of axion-like particles coupling to electrons, reloaded
Damiano F. G. Fiorillo, Tetyana Pitik, Edoardo Vitagliano
We revisit the production of axion-like particles (ALPs) coupled to electrons at tree-level in a relativistic plasma. We explicitly demonstrate the equivalence between pseudoscalar…