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SUMMARY:Rethinking Axion Dark Matter [Exceptional Time]
DTSTART:20251002T121500Z
DTEND:20251002T141500Z
DTSTAMP:20260828T112900Z
UID:indico-event-868@indico.hiskp.uni-bonn.de
DESCRIPTION:Speakers: Subir Sarkar (Oxford)\n\nWhen the Peccei-Quinn symme
 try breaks after inflation\, domain walls will form at the QCD scale in th
 e axion field if there is more than one quark charged under the symmetry (
 as in e.g. the DFSZ model). When destabilised by quantum gravity effects\,
  the collapse of the wall network creates relativistic axions\, which subs
 equently turn non-relativistic and contribute to cold dark matter. Account
 ing for this requires the axion to be heavier than ~10 meV - a mass range 
 that is little explored experimentally. We describe first results from a l
 ight-shining-through-walls search at the EuXFEL\, Hamburg. [Halliday et al
 . Phys.Rev.Lett. 134:055001(2025)\; Beyer & Sarkar\, SciPost Phys.15:003(2
 023)].\n\nhttps://indico.hiskp.uni-bonn.de/event/868/
URL:https://indico.hiskp.uni-bonn.de/event/868/
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