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SUMMARY:Quantum Gravity Bounds on 4D EFTs with Minimal Supersymmetry
DTSTART:20230328T120000Z
DTEND:20230328T140000Z
DTSTAMP:20230609T120205Z
UID:indico-event-1255101@indico.cern.ch
DESCRIPTION:According to the Swampland idea\, quantum gravity effects put
severe constraints on effective field theories beyond the usual consistenc
y conditions from quantum field theory such as absence of gauge or gravita
tional anomalies. In this talk\, we propose such constraints for four-dime
nsional N=1 supergravities based on consistency of certain axionic\, or EF
T\, strings. These are certain strings which are magnetically charged unde
r the axionic components of the chiral N=1 superfields\; their existence
follows from the Completeness Conjecture in quantum gravity. The key obse
rvation is that anomaly inflow from the four-dimensional theory to the str
ing worldsheet induces anomalies on the string which must be cancelled by
local anomalies on the string. This results in various quantisation condit
ions as well as bounds on the signs of axionic couplings in the supergravi
ty\, including the sign of the Gauss-Bonnet term\, and also bounds on the
rank of the gauge group in terms of these Gauss-Bonnet couplings. These co
nstraints can rule out supergravity theories which otherwise look perfec
tly healthy as effective field theories of quantum gravity. We also test t
he proposed constraints by comparing them with explicit string models\, i
n particular with F-theory compactifications to four dimensions.\n\nhttps:
//indico.cern.ch/event/1255101/
LOCATION:CERN 4/3-006 - TH Conference Room
URL:https://indico.cern.ch/event/1255101/
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