Status  Confirmed 
Seminar Series  IPHTMAT 
Subjects  hepth 
Date  Wednesday 21 November 2018 
Time  14:15 
Institute  IPHT 
Seminar Room  Salle Claude Itzykson, Bât. 774 
Speaker's Last Name  Pierre Corvilain 
Speaker's First Name  
Speaker's Email Address  
Speaker's Institution  Utrecht University 
Title  Anomalies on a circle and Infinite distance in Kaehler moduli space in Ftheory 
Abstract  We consider a 4D theory with a chiral anomaly, on $R^3 \times S^1$. From the 3D perspective, it seems at first that the anomaly is lost since odd dimensions do not allow for local anomalies. However the anomaly cannot simply disappear, and by choosing a regulator that preserves the symmetries of the UV (4D lorentz invariance in this case) in order to integrate out the KKmodes, we show that fielddependant ChernSimons terms are generated at one loop. These are not gauge invariant and in fact capture the whole 4D anomaly, in a 3D language. We further extend these results to 6D anomalies and comment on the implications for Ftheory compactifications. Integrating out the KKmodes also leads infinite distance in radius modulus space. We explain how this relates to the Swampland Distance Conjecture and the idea of emergence. We then apply this to the Ftheory circle and explain how it relates to infinite distances in the Kaehler moduli space of the CalabiYau threefold on which Ftheory is compactified. These singularities can be analyzed from their monodromy matrix, which depends on the intersection number of the CY. This suggests that some topological data of the CY are emergent. 
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