Abstract
The probability distributions for hadrons emitted in high energy collisions can be described by partially coherent field emissions from a set of sources, as in quantum optics. The observed broadening of the scaled data, i.e. a plot of 〈 n〉 P n vs n/〈 n〉 with increasing average multiplicity 〈 n〉 (i.e. increasing energy), is best interpreted as due to an increasingly dominant (Gaussian) noise component. If in addition one uses data on forward-backward correlations, one can correlate a saturation of normalized moments 〈 n r 〉/〈 n〉 r with a strong increase of the correlation length in rapidity space. This phase transition-lik behavior is, we believe connected with the onset of the excitation of the quark-gluon plasma in hadron-hadron collisions.
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