%0 Journal Article
%A Alfaro, J.
%A Dobado González, Antonio
%A Espriu, Domènec
%T Chiral Lagrangians and the QCD string
%D 1999
%@ 0370-2693
%U https://hdl.handle.net/20.500.14352/58724
%X We propose a method to derive the low-energy effective action of QCD assuming that the long-distance properties of strong interactions can be described by a string theory. We bypass the usual problems related to the existence of the tachyon and absence of the adequate Adler zero by using a sigma model approach where excitations above the correct (chirally non-invariant) QCD vacuum are included. Two-dimensional conformal invariance then implies the vanishing of the O(p(4)) effective lagrangian coefficients. We interpret this result and discuss ways to go beyond this limit.
%~