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SUMMARY:Georgios Tringas (Lehigh University)
DTSTART:20250610T090000Z
DTEND:20250610T100000Z
DTSTAMP:20260423T024826Z
UID:NKUA-HEP/38
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/NKUA-HEP/38/
 ">Scale-separation from O-planes</a>\nby Georgios Tringas (Lehigh Universi
 ty) as part of NKUA HEP Seminars\n\n\nAbstract\nOrientifold planes play a 
 crucial role in flux compactifications of string theory\, and we demonstra
 te their deep connection to achieving scale-separated solutions. Specifica
 lly\, we show that when an orientifold plane contributes at leading order 
 to the non-zero value of the scalar potential\, then either the weak coupl
 ing limit or the large volume limit implies scale separation\, meaning tha
 t the Kaluza-Klein tower mass decouples from the inverse length scale of t
 he lower-dimensional theory. Notably\, in the supergravity limit\, such so
 lutions are inherently scale-separated. This result is independent of the 
 spacetime dimension and the dimensionality of the Op-plane as long as p < 
 7. Similarly\, we show that parametric scale separation is not possible fo
 r isotropic compactifications with a leading curvature term that generical
 ly arise in the AdS/CFT context. We classify all possible flux compactific
 ation setups in both type IIA and type IIB string theory for Op-planes wit
 h 2 ≤ p ≤ 6 and present their universal features. While the parametric
 ally controlled scale-separated solutions are all AdS\, we also find setup
 s that allow for dS vacua. We prove that flux quantization prevents these 
 dS vacua from arising in a regime of parametric control.\n
LOCATION:https://researchseminars.org/talk/NKUA-HEP/38/
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