On local parton-hadron duality
We show that in the Lund string fragmentation model fore+e−-annihilation events, the final state hadrons are to a large extent determined by the (colour connected) multiparton state. To that end we define a )timelike) curve (thex-curve) in energymomentum space directly from the parton state. The fragmentation process produces hadrons with momenta along this curve, with limited deviations away from it. At high energies the fluctuations in the parton cascade dominate over the fluctuations in the hadronization. Therefore a good approximation to the inclusive momentum distributions is obtained simply by partitioning thex-curve into pieces (“hadrons”) with equal mass. This is a direct realization of the notion of parton-hadron duality.