  We show how an effective field theory of long distance QCD, describing a dual
superconductor, can be expressed as an effective string theory of
superconducting vortices. We use the semiclassical expansion of this effective
string theory about a classical rotating string solution in any spacetime
dimension D to obtain the semiclassical meson energy spectrum. For D=26, it
formally coincides with the energy spectrum of the open string in classical
Bosonic string theory. However, its physical origin is different. It is a
semiclassical spectrum of an effective string theory valid only for large
values of the angular momentum. For D=4, the first semiclassical correction
adds the constant 1/12 to the classical Regge formula for the angular momentum
of mesons on the leading Regge trajectory.

High Energy Physics - Phenomenology