Jun 10 – 14, 2024
Faculty of Mathematics and Physics, Ljubljana (Slovenia)
Europe/Ljubljana timezone

ALPs coupled to nucleons shining into photons

Jun 12, 2024, 5:00 PM
10m
Faculty of Mathematics and Physics, Ljubljana (Slovenia)

Faculty of Mathematics and Physics, Ljubljana (Slovenia)

Jadranska 19

Speaker

Alessandro Lella

Description

In this talk I will explore the phenomenology of Axion-Like Particles (ALPs) coupled to nucleons. I will argue that these couplings must descend from a high-energy theory where ALPs are coupled to both gluons and quarks, which could naturally induce a low-energy coupling to photons. In this scenario, I will discuss the low-energy phenomenology for these ALPs, focusing on their production in core-collapse Supernovae. In particular, the induced photon coupling allows ALPs with masses $m_a \gtrsim 1\,$ MeV to efficiently decay into photon pairs. Then, I will show how the related astrophysical observables can severely constrain the ALP parameter space, enlarging the region ruled out by the usual SN cooling bound.

Presentation materials