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SUMMARY:Axiverse Strings - Hannah Tillim - University of Oxford
DTSTART:20220307T130000Z
DTEND:20220307T140000Z
UID:TALK168725@talks.cam.ac.uk
CONTACT:Francesco
DESCRIPTION:If the QCD axion solves the strong CP problem then light axion
 -like-particles (ALPs) are expected to be ubiquitous in string theory (the
  string axiverse) and give rise to axion cosmic strings\, in which compact
  dimensions seem to decompactify at the origin. In this talk I review cosm
 ic strings\, axions and the string axiverse\, before turning to study the 
 properties of axiverse cosmic strings in a toroidal compactification\, inc
 luding the crucial effects of moduli stabilization. At the core\, the cosm
 ic string is revealed to be a brane in disguise\, and at long distances th
 ere are potential new signatures involving variations in Standard Model pa
 rameters and equivalence principle violations. We find indications of simi
 lar behaviour in more realistic Calabi-Yau compactifications.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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