Regge-cascade hadronization

Abstract

We argue that the evolution of coloured partons into colour-singlet hadrons has approximate factorization into an extended parton-shower phase and a colour-singlet resonance--pole phase. The amplitude for the conversion of colour connected partons into hadrons necessarily resembles Regge-pole amplitudes since qq-bar resonance amplitudes and Regge-pole amplitudes are related by duality. A `Regge-cascade' factorization property of the N-point Veneziano amplitude provides further justification of this protocol. This latter factorization property, in turn, allows the construction of general multi-hadron amplitudes in amplitude-squared factorized form from (1->2) link amplitudes. We suggest an algorithm with cascade-decay configuration, ordered in the transverse momentum, suitable for Monte-Carlo simulation. We make a simple implementation of this procedure in Herwig++, obtaining some improvement to the description of the event-shape distributions at LEP.

10 pages, 9 figures

References in corpus (11)

• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• HERWIG 6.4 Release Note
• HERWIG 6.1 Release Note
• HERWIG 6.3 Release Note
• QCD at large and short distances (annotated version)
• The theory of quark confinement
• Production of pi+, pi-, K+, K-, p and p-bar in Light (uds), c and b Jets from Z0 Decays
• Herwig++ 1.0: An Event Generator for e+e- Annihilation
• Measurement of gamma gamma -> p p-bar production at Belle
• The underlying event and fragmentation
• Local charge compensation from colour preconfinement as a key to the dynamics of hadronization