We analyze the wavefunctions for open strings stretching between intersecting
7-branes in type IIB/F-theory warped compactifications, as a first step in
understanding the warped effective field theory of 4d chiral fermions. While in
general the equations of motion do not seem to admit a simple analytic
solution, we provide a method for solving the wavefunctions in the case of weak
warping. The method describes warped zero modes as a perturbative expansion in
the unwarped spectrum, the coefficients of the expansion depending on the
warping. We perform our analysis with and without the presence of worldvolume
fluxes, illustrating the procedure with some examples. Finally, we comment on
the warped effective field theory for the modes at the intersection.Comment: 64 pages, 1 figure. References updated, typos fixed, discussion on
varying dilaton case slightly modified. Version to appear in JHE
