4 papers
Axion-like particle limits from multi-messenger sources
Ariane Dekker, Gonzalo Herrera, Dimitrios Kantzas
High-energy neutrino observation from the Seyfert galaxy NGC 1068 offers new insights into the non-thermal processes of active galactic nuclei. Simultaneous gamma-rays emitted by s…
Quality control for axions and ALPs
Andrew Cheek, Andrew Fowlie, Gonzalo Herrera
Axions and axion-like particles (ALPs) are protected by Peccei-Quinn (PQ) symmetries that quantum gravity is expected to break. Modeling quantum gravity by Planck-suppressed PQ-bre…
Electromagnetic Radiation from Cosmic-Ray Scatterings on Relic Neutrinos
Gonzalo Herrera, Abraham Loeb
Cosmic-ray scatterings on the cosmic neutrino background induce a flux of gamma-rays and X-rays from boosted meson decays and charged lepton processes. Here we present the first es…
Polarization Measurements as a Probe of Axion-Photon Coupling: a Study of GRB 221009A
Boris Betancourt Kamenetskaia, Nissim Fraija, Gonzalo Herrera
Axion Like Particles (ALPs) can be produced in Gamma Ray Bursts, altering the polarization of the electromagnetic emission in these events. For the first time, we derive bounds on…