Axions: Bounds and Discovery Opportunities

Il giorno 19/02/2021 il Prof. Alessandro Mirizzi (Univ. Bari & INFN Bari) terra' un seminario virutale per la Norwegian University of Science and Technology (NTNU) in Trondheim.

Title: "Axions: Bounds and Discovery Opportunities"

Abstract: Axions have been introduced in relation to the strong CP problem ofthe QCD and are predicted in many extensions of the Standard Model of particle physics.

Depending on the actual value of their mass, axions can play an important role in cosmology, acting as cold or hot dark matter. The coupling with photons allows for axion-photon mixing in external electromagnetic fields.

This effect is exploited for direct searches of axions in laboratory experiments. Axions can be searched also through astrophysical observations. Notably they can be produced in stellar cores leading to an excessive energy loss, that would alter the standard stellar evolution.

Furthermore, the two-photon vertex would also induce the mixing with axions for photons emitted by distant astrophysical sources, and propagating in the large-scale cosmic magnetic fields, leading to peculiar observational signature.

In this talk I will present an overview of current bounds on axions and discovery opportunities in the planned laboratory and astrophysical experiments.

Zoom Meeting: https://NTNU.zoom.us/j/96674485648?pwd=bWZxUHZGemsycTBBUTgzY1hEN0VGQT09

Meeting ID: 966 7448 5648 Passcode: 561745