BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Strong CP\, the QCD vacuum and axions: old questions and new persp
 ectives
DTSTART:20261022T123000Z
DTEND:20261022T143000Z
DTSTAMP:20261016T013700Z
UID:indico-event-1954@indico.dfa.unipd.it
DESCRIPTION:Speakers: Andreas Ringwald (DESY)\n\nThe strong CP problem rem
 ains a central open question in particle physics and a primary motivation 
 for the QCD axion. Recent proposals have challenged this picture\, arguing
  that an appropriate treatment of the infinite-volume limit removes strong
  CP violation. In this seminar\, I will examine these claims through the i
 nterplay between fixed topological charge\, the order of limits\, and QCD
 ’s response to external sources. Low-energy effective theory and anomalo
 us Ward identities provide complementary tests of the proposed phase align
 ment\, while lattice results offer quantitative consistency checks. I will
  discuss what these arguments establish\, which assumptions they require\,
  and their implications for the strong CP problem and the motivation for a
 xion searches.\n\nhttps://indico.dfa.unipd.it/event/1954/
LOCATION:Dipartimento di Fisica e Astronomia - Edificio Ricci-Curbastro (e
 x-Paolotti)
URL:https://indico.dfa.unipd.it/event/1954/
END:VEVENT
END:VCALENDAR