Quartic gauge couplings from $K3$ geometry
Quartic gauge couplings from $K3$ geometry
We show how certain F 4 couplings in eight dimensions can be computed using the mirror map and K3 data.They perfectly match with the corresponding heterotic one-loop couplings, and therefore this amounts to a successful test of the conjectured duality between the heterotic string on T 2 and F-theory on …