The methods allowing us to extract the coherent component of pion emission conditioned by the formation of a quasiclassical pion source in heavy ion collisions are suggested. They exploit a nontrivial modification of the quantum statistical and final state interaction effects on the correlation functions of like and unlike pions in the presence of the coherent radiation. The extraction of the coherent pion spectrum from ${\pi }^{+}{\pi }^{-}$ and ${\pi }^{\pm }{\pi }^{\pm }$ correlation functions and single-pion spectra is discussed in detail for large expanding systems produced in ultrarelativistic heavy ion collisions.

• Received 18 July 2001

DOI:https://doi.org/10.1103/PhysRevC.65.064904