Hypothesis of Statistical Jet Evolution Confronted with E sup + E sup - Annihilation Data

摘要

We describe the process e exp + e exp - -> hadrons in a 'dynamical' phase space, where energy and momentum are quantised in a volume, which expands with velocity of light in a sequence of discrete time steps. Our hypothesis of statistical evolution which is based on an appropriate application of the equipartition principle, determines uniquely the distribution over the resolvable states in this dynamical phase space and leads to a branching process. Neglecting all degrees of freedom except energy and momentum, and restricting to final state pions we arrive at a minimal model with no other parameters than h, c and msub( pi ). We compare this model in detail with data on multiplicities, inclusive spectra and energy-energy correlations; new energy flow measurements will be proposed. The low energy region (1 < W < 5 GeV) may provide a clue on the role of color as a new degree of freedom. (ERA citation 09:017638)