Spring Institute 2019 The importance of being light: Axions, Nambu-Goldstone Bosons, and Vector Bosons in the Dark

21 May 2019, 10:00 → 22 May 2019, 18:00 Europe/Rome

INFN-LNF, Aula Salvini & Aula Seminari

Enrico Nardi (LNF)

Aim of the meeting:

This informal meeting is intended for extensive discussions on 

phenomenological aspects of the physics of light and ultralight

particles, axions, Nambu-Goldstone bosons, and new  vector bosons

feebly coupled to the standard model. 

 

 

Seminars:

 

 

Tuesday 21/05 11:00am        Luca Visinelli (Nordita & Uppsala Univ.) 

"Axion miniclusters and implications for axion detection"

(Aula Salvini)

 

Tuesday 21/05 2:30pm         Giorgio Arcadi  (Roma 3 Univ.) 

"New light bosons from tritium decay"

(Aula Salvini)

 

Wednesday 22/05 11:00am:      Luca Di Luzio (Pisa University)
"Nambu-Goldstone bosons in Cosmology" 

(Aula Seminari)

 

Wednesday 22/05, 2:30pm        Daniele Barducci (Roma University)
"Neutral hadrons disappearing into the darkness"

(Aula Salvini)

 

                              

Tuesday, 21 May

1 Axion miniclusters and implications for axion detection

Axions and axion-like particles are excellent dark matter candidates, spanning a vast range of mass scales from the milli- and micro-eV for the QCD axion, to even lighter candidates that make up the “axiverse”. In some scenarios, inhomogeneities in the axion density lead to the formation of compact structures known as axion “miniclusters” and axion stars. Topological defects in the early universe might also contribute the energy density of axions and generate primordial gravitational waves that can possibly be detected in future experiments. I will first discuss astrophysical and cosmological constraints on axions at either end of this spectrum, using data from the cosmic microwave background anisotropies and the effects of miniclusters on the gravitational microlensing and on direct detection. I will then assess the formation and the evolution of axion stars in various astrophysical regimes.

Speaker: Luca Visinelli (Uppsala Univ.)

Visinelli_Frascati_2019.pdf

2 New light bosons from tritium decay

Speaker: Giorgio Arcadi (University of Goettingen)

frascatitritium.pdf

Wednesday, 22 May

3 Nambu-Goldstone bosons in Cosmology

Speaker: Luca Di Luzio (Istituto Nazionale di Fisica Nucleare)

4 Neutral hadrons disappearing into the darkness

Speaker: Daniele Barducci (Istituto Nazionale di Fisica Nucleare)

barducci_.pdf