ters are directly associated with it.
However, a simple "minimal" procedure of colour flow only via the beam 
remnants does not result in a scenario in
agreement with data, notably not a sufficiently steep rise of  
<i>&lt;pT&gt;(n_ch)</i>. The true origin of this behaviour and the
correct mechanism to reproduce it remains one of the big unsolved issues 
at the borderline between perturbative and nonperturbative QCD. 
As a simple attempt, an additional step is introduced, wherein the gluons 
of a lower-<i>p