2019 Winter institute on Axions in Astrophysics and Cosmology

Contribution List

1. Astrophobic Axions

Enrico Nardi

21/01/2019, 14:30

Reliable estimates of the allowed range for axion couplings to photons, nucleons and electrons are of major importance for determining the viable axion mass window as well as to focus experimental axion searches.
We show that in a class of generalized DFSZ axion models with generation dependent Peccei-Quinn charges the axion
couplings to nucleons and electrons can be simultaneously...

2. Peccei-Quinn Symmetry as a Flavor Symmetry

Fredrik Bjorkeroth (INFN-LNF)

21/01/2019, 15:00

There has been recent interest in possible connections between a Peccei-Quinn (PQ)
symmetry and quark flavour structures. I describe how a generic
generation-dependent U(1) symmetry acting on the quark Yukawa operators can reduce
the number of free parameters in the quark sector. The maximal reduction
compatible with CP violation yields nine real parameters and one phase, which ...

3. Future challenges for Axion Physics

Luca Visinelli

22/01/2019, 14:30

In this talk, I want to provide with some topics that I consider interesting to be explored in the near future. In particular, I will discuss a few ideas for small and big projects that could be developed in relation with axion physics, with a particular attention to the role of substructures.

4. Bounds and Hints on Axions from Stars

Maurizio Giannotti

23/01/2019, 14:30

Stars are powerful laboratories to study light, weakly interactive particles. In particular, considerations about stars and stellar evolution have led to strong bounds on axion like particles (ALPs), hidden photons, anomalous electromagnetic properties of neutrinos, etc. More recently, observations of excessive stellar energy losses have led to the appealing idea that new-physics (most likely,...