Multimessenger constraints for electrophilic feebly interacting particles from supernovae

TL;DR

This paper reviews multimessenger observational techniques to constrain electrophilic feebly interacting particles produced in supernovae, covering their emission signatures across X-ray and gamma-ray spectra, and applies broadly to various particle models.

Contribution

It introduces a model-independent multimessenger approach to constrain electrophilic FIPs from supernovae, encompassing diverse observational signatures and particle types.

Findings

Established constraints on electrophilic FIPs from supernova observations.

Demonstrated the applicability of the approach to multiple particle models.

Connected supernova emission signatures to particle properties across different messengers.

Abstract

Several extensions of the Standard Model predict the existence of sub-GeV particles that can be copiously produced in the cores of supernovae. A broad family of these particles are dubbed feebly interacting particles (FIPs), which can have masses of up to a few hundreds of MeV. Here, we review the most recent and leading constraints on electrophilic FIPs, describing multimessenger techniques that allow us to probe the full phenomenology of the electron/positron emission produced by these FIPs; from their associated X-ray emission to the production of the $511$~keV line. Furthermore, the approach described here is independent of the specific particle model and can be translated to the coupling and other properties of a variety of different particles, such as axion-like particles, sterile neutrinos or dark photons