URL: https://physikseminar.desy.de/hamburg/colloquia_in_2026/03_march_2026/@@siteview
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The Phenomenologist’s Guide to the Axiverse
Sokratis Trifinopoulos (CERN)
Auditorium (Bldg 5, DESY Hamburg) and Zoom, 16:00h
Axions offer a uniquely rich window into physics beyond the Standard Model, linking the solution of the strong CP problem to dark matter and to the broader “axiverse” predicted in many ultraviolet-complete theories. In this talk, I trace axions across the vast range of masses and scales they may inhabit: from the ultralight sub-eV regime and the largest cosmological distances, where their interactions with the visible sector are purely gravitational and large-scale structure (LSS) surveys provide the primary probes; through the keV–MeV range, where hadronic interactions become relevant and—intriguingly—discovery may occur at nuclear fusion facilities; to the smallest distances and heavier GeV–TeV axions explored at next-generation lepton–ion colliders. Addressing this extraordinary span of scales demands an equally broad phenomenological toolkit, from effective field theories of LSS to AI-assisted modeling of atomic nuclei. In this context, I reflect on how the exploration of the axiverse reshapes the role of modern phenomenology at the interface of particle, nuclear, and cosmological physics.
We invite you to attend the presentations in person at the DESY Auditorium in building 5. We will also offer a webcast for this colloquium.
Connection details:
Zoom link: https://desy.zoom.us/j/99616528733
Meeting ID: 996 1652 8733
Meeting Password: 733220
