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SUMMARY:On string axions and the dark universe
DTSTART:20260416T130000Z
DTEND:20260416T150000Z
DTSTAMP:20260507T065000Z
UID:indico-event-51726@agenda.infn.it
DESCRIPTION:Speakers: Nicole Righi (SNS)\n\nString axions have been propos
 ed as candidates for solving a number of puzzles in cosmology. In this tal
 k\, I will focus on ultralight axions as dark matter. After a review on wh
 y and how string axions can occur in our universe\, I will provide a strin
 g theoretical explanation of dark matter as composed by axions coming from
  superstring theory on Calabi-Yau manifolds. Based on the latest bounds\, 
 I will show how likely it is for dark matter to be composed of such partic
 les and in which abundance\, and I will provide predictions on the preferr
 ed ranges of masses and decay constants. On the contrary\, requiring the a
 xions to lie in a particular range of the parameter space imposes constrai
 nts on the UV theory. I will focus both on the role of moduli stabilizatio
 n and on the statistical properties of the string landscape. In the end\, 
 I will present some interesting future directions in axion theory.\n\nhttp
 s://agenda.infn.it/event/51726/
LOCATION:room 248 Ed. C Pisa
URL:https://agenda.infn.it/event/51726/
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