Holomorphic variables in magnetized brane models with continuous Wilson lines

Understand

We analyze the action of the target-space modular group in toroidal type IIB orientifold compactifications with magnetized D-branes and continuous Wilson lines.

• The transformation of matter fields agree with that of twisted fields in heterotic compactifications, constituting a check of type I/heterotic duality.
• We identify the holomorphic N = 1 variables for these compactifications.
• Matter fields and closed string moduli are both redefined by open string moduli.