Regge Poles in Qcd
نویسنده
چکیده
Basic properties of Regge poles are reviewed. Regge poles are considered from both t-channel and s-channel points of view. The main part of the review is devoted to the Regge poles in QCD. The method of the Wilson-loop path integral is used to calculate trajectories of Regge poles for q − q̄ and gluonic states. The problem of the Pomeron in QCD is discussed in details. It is shown how to use the 1/Nexpansion for classification of reggeon diagrams in QCD. The role of Regge cuts in reggeon theory is discussed and their importance for high-energy phenomenology is emphasized. Models based on the reggeon calculus, 1/N-expansion in QCD and string picture of interactions at large distances are reviewed and are applied to a broad class of phenomena in strong interactions. It is shown how to apply the reggeon approach to small-x physics in deep inelastic scattering.
منابع مشابه
The Pomeron and Gauge/String Duality
The traditional description of high-energy small-angle scattering in QCD has two components — a soft Pomeron Regge pole for the tensor glueball, and a hard BFKL Pomeron in leading order at weak coupling. On the basis of gauge/string duality, we present a coherent treatment of the Pomeron. In large-N QCD-like theories, we use curved-space string-theory to describe simultaneously both the BFKL re...
متن کاملConfinement and the Supercritical Pomeron in Qcd
Deep-inelastic diffractive scaling violations have provided fundamental insight into the QCD pomeron, suggesting a single gluon inner structure rather than that of a perturbative two-gluon bound state. This paper derives a highenergy, transverse momentum cut-off, confining solution of QCD. The pomeron, in first approximation, is a single reggeized gluon plus a “wee parton” component that compen...
متن کاملDoes the " Soft Pomeron " Cope with the Hera Data?
It is demonstrated that the " soft pomeron " (together with a secondary reggeon) describing cross-sections of hadron-hadron collisions is fairly able to describe the energy dependence of cross-sections of exclusive (virtual) photoproduction of vector mesons (ρ 0 , ϕ, J/ψ) obtained at HERA. However these poles are insufficient for description of the total DIS cross-section. The effect of acceler...
متن کاملMigdal’s model and Holography
More than 30 years ago Migdal proposed a model for hadronic resonances based on rational approximants [1]. The final aim was to determine the spectrum of vector mesons in the large-Nc limit which best fulfills quarkhadron duality. The strategy was to start from the short distance behavior of the vector vacuum polarization function < V V > and build the Padé approximant thereof. Migdal further s...
متن کاملRegge amplitudes from AdS/CFT duality
It is well-known that string theory started from the proposal of scattering amplitudes which may grasp the two major structures of soft interaction phenomenology in a condensed form : resonances and Regge poles. Two types of amplitudes were proposed for four-point amplitudes, see Fig.1. The Veneziano amplitude corresponds to Reggeon exchanges with non-vacuum quantum numbers and the Shapiro-Vira...
متن کامل