  Multipion production in high energy nucleus-nucleus collisions is considered
in the model of the pion radiation by classical current. Strong coherent
effects of narrowing of pion longitudinal and transverse momenta distributions
are predicted at the RHIC energy. The coherence enhances the large
pseudorapidities producing the bump in the distribution. The growth of the
average pion multiplicity and the oscillation effect in the multiplicity
distribution are caused by the coherence as well.
