Particle Avenues in the Dark Universe Arena (PADUA): Axions

Padua, Italy

Astronomical and cosmological observations reveal that visible matter constitutes only a fraction of the total mass of the universe. Some form of dark matter, five times more abundant than ordinary matter, must exist. However, these observations tell us nothing about the origin and composition of this invisible constituent. None of the known particles is a viable candidate, and this firm empirical evidence leaves no doubt about the need for physics beyond the standard model.

Unveiling the mystery of dark matter will rely upon the synergy between investigations of nature at the largest and smallest length scales.

The PADUA workshop will gather world experts to review the state-of-the-art and explore novel directions in the context of a well-motivated and popular dark matter candidate: the QCD axion.  

The participation in the workshop includes coffee breaks and social dinner. No registration fee is required. Due to the room capacity of the workshop venue, the number of participants will be limited. The deadline to apply is July 15th, 2022.


  • José Luis Bernal (Johns Hopkins University)
  • Caterina Braggio (University of Padua)
  • Andrea Caputo (Tel Aviv University)
  • Pierluca Carenza (Stockholm University)
  • Raymond Co (University of Minnesota)
  • Miguel Escudero (Technical University of Munich)
  • Martina Gerbino (INFN Ferrara)
  • Arthur Hebecker (Heidelberg University)
  • Sang Hui Im (IBS Daejeon)
  • David J.E. Marsh (King’s College London)
  • Enrico Morgante (Johannes Gutenberg University of Mainz)
  • Marco Regis (University of Turin)
  • Andreas Ringwald (DESY Hamburg)
  • Nicholas Rodd (CERN)
  • Geraldine Servant (DESY Hamburg)
  • Elisa Todarello (University of Turin)
  • Giovanni Villadoro (ICTP Trieste)
  • Robert Ziegler (Karlsruhe Institute of Technology)


  • Francesco D'Eramo
  • Luca Di Luzio
  • Antonio Masiero
  • Marco Peloso
  • Ennio Salvioni
  • Luca Vecchi
  • Aleksandr Chatrchyan
  • Alessandro Lenoci
  • Alessandro Valenti
  • Alessio Notari
  • Alfredo Walter Mario Guerrera
  • Andrea Caputo
  • Andrea Tesi
  • Andreas Ringwald
  • Antonio Masiero
  • Arthur Hebecker
  • Caterina Braggio
  • David Marsh
  • Davide Dal Cin
  • Elena Vanetti
  • Eleonora Vanzan
  • Elisa Todarello
  • Ely Kovetz
  • Ennio Salvioni
  • Enrico Morgante
  • Enrico Nardi
  • Fabio Zwirner
  • Fazlollah Hajkarim
  • Federico Cima
  • Federico Semenzato
  • Ferruccio Feruglio
  • Francesco D'Eramo
  • Gabriele Levati
  • Geraldine Servant
  • Giacomo Landini
  • Gianmassimo Tasinato
  • Gioacchino Piazza
  • Giovanni Villadoro
  • Giuseppe Lucente
  • Herbi Dreiner
  • Ivana Batković
  • Ivonne Zavala
  • Jonathan Kley
  • José Luis Bernal
  • Ling-Xiao Xu
  • Lorenzo Ubaldi
  • Luca Caloni
  • Luca Di Luzio
  • Luca Vecchi
  • Marcin Badziak
  • Marco Gorghetto
  • Marco Peloso
  • Marco Regis
  • Margherita Putti
  • Martina Gerbino
  • Massimilano Lattanzi
  • Michele Cicoli
  • Michele Doro
  • Miguel Escudero
  • Miha Nemevšek
  • Nicholas Rodd
  • Nicola Barbieri
  • Pablo Olgoso
  • Philip Sørensen
  • Pierluca Carenza
  • Pietro Grutta
  • Raymond Co
  • Robert Ziegler
  • Sang Hui Im
  • Sarah Farzand
  • Sarah Libanore
  • Sarif Khan
  • Seokhoon Yun
  • Stefano Manzoni
  • Stefano Rigolin
  • Sukannya Bhattacharya
  • Xavier Ponce Diaz
    • Registration
    • Welcome to PADUA
      Convener: Francesco D'Eramo (University of Padua)
      • 1
        Welcome from the University of Padua
        Speaker: Fabio Zwirner
      • 2
        Welcome from the Department of Physics and Astronomy
        Speaker: Flavio Seno (università di Padova)
      • 3
        Welcome from the Istituto Nazionale di Fisica Nucleare (INFN)
        Speaker: Roberto Carlin
    • Day 1 - Morning
      Convener: Ennio Salvioni (University of Padua)
      • 4
        Boosting the photon coupling of the hadronic axion
        Speaker: Andreas Ringwald
      • 5
        Flavor Probes of Axion Dark Matter
        Speaker: Robert Ziegler
      • 11:00 AM
        Coffee Break
      • 6
        Uncovering microscopic origins of axions by low energy precision physics
        Speaker: Sang-hui Im
    • Day 1 - Afternoon
      Convener: Marco Peloso (University of Padua)
      • 7
        Axion Miniclusters: Recent Progress and Open Problems
        Speaker: David J.E. Marsh
      • 8
        A self-consistent wave description of axion miniclusters and their survival in the galaxy
        Speaker: Elisa Todarello
      • 3:30 PM
        Coffee Break
      • 9
        Dark matter search goes quantum: axion search in Padua
        Speaker: Caterina Braggio
    • Social Activity: Visit of Museo Poleni

      We will gather at 17:30 at the entrance to Sala Rossini (downstairs). We will walk together to Museo Poleni, and the visits will begin at 18:00.

    • Day 2 - Morning
      Convener: Antonio Masiero
      • 10
        The stochastic relaxion
        Speaker: Geraldine Servant
      • 11
        Novel Cosmological Roles and Experimental Searches of (QCD) Axions
        Speaker: Raymond Co
      • 11:00 AM
        Coffee Break
      • 12
        Axion fragmentation
        Speaker: Enrico Morgante
    • Day 2 - Afternoon
      Convener: Luca Vecchi
      • 13
        Seeking axion-like particles with gamma-ray attenuation
        Speaker: Jose Bernal
      • 14
        Searching for ALP decays in the sky
        Speaker: Marco Regis
      • 3:30 PM
        Coffee Break
      • 15
        Axion dark matter from strings
        Speaker: Giovanni Villadoro
      • 16
        Round Table Discussion: Axion Strings
        Speakers: Andreas Ringwald, David J.E. Marsh
    • Social Dinner
    • Day 3 - Morning
      Convener: Luca Di Luzio
      • 17
        Slaying the Hydra of Dark Radiation
        Speaker: Arthur Hebecker
      • 18
        Novel cosmological bounds on thermally-produced axion-like particles
        Speaker: Martina Gerbino
      • 11:00 AM
        Coffee Break
      • 20
        The Irreducible Axion
        Speaker: Nicholas Rodd
      • 21
        Axion Star Explosions and the Reionization History of the Universe
        Speaker: Miguel Escudero
    • Day 3 - Afternoon
      Convener: Francesco D'Eramo (University of Padua)
      • 22
        Low-energy Supernovae constraints on ALPs
        Speaker: Andrea Caputo
      • 23
        Supernovae as axion factories: the latest developments
        Speaker: Pierluca Carenza
      • 3:30 PM
        Closing and Final Coffee Break
    • Social Activity: Tour of Palazzo Bo

      We will gather at 16:45 at the entrance to Sala Rossini (downstairs). We will walk together to the Bo Palace, and the visits will begin at 17:00.