Year: 2011
Type: article
Abstract: QCD string is formed at distances larger than the confinement scale and can be described by the Polchinski--Strominger effective string theory with a nonpolynomial action, which has nevertheless a well-defined semiclassical expansion around a long-string ground state. We utilize modern ideas about the Wilson-loop/scattering-amplitude duality to calculate scattering amplitudes and show that the expansion parameter in the effective string theory is small in the Regge kinematical regime. For the amplitudes we obtain the Regge behavior with a linear trajectory of the intercept $(d\ensuremath{-}2)/24$ in $d$ dimensions, which is computed semiclassically as a momentum-space L\"uscher term, and discuss an application to meson scattering amplitudes in QCD.
Author: Yuri Makeenko
Institution: Institute for Theoretical and Experimental Physics
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2140696834