Time evolution of the two-jet events $e^+-e^- \to hadrons$ in the Dynamical String Model

The time dependent pion emission rate and the mean life time of the pion source in the center of mass frame of the two-jet events have been determined for $e^+-e^- \to hadrons$ at $\sqrt{s} = 20 - 50$ GeV by the Dynamical String Model. It was established that the time needed for the creation of the pion source is $5$ fm/c, whereas its life time is $τ_0 \approx 7 - 13$ fm/c for energies $\sqrt{s} = 20 - 50$ GeV, respectively.

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