We study the posibility of large isospin fluctuations in high-energy heavy-ion collisions by assuming that pions are produced semiclassically both directly and in pairs through the isovector channel. The leading-particle effect and the factorization property of the scattering amplitude in the impact parameter space are used to define the classical pion field. In terms of the joint probability function $P_{ II_{ 3}}(n_{ 0},n_{ \_})$ for producing $n_{ 0}$ neutral and $n_{ \_}$ negative pions from a definite isospin state $II_{ 3}$ of the incoming leading-particle system we calculate the two pion correlation parameters $f_{ 2,n_{ \_}}^{ 0}$ and the average number of neutral pions $(< n_{ 0} >_{ n_{ \_}})$ as a function of negative pions $(n_{ \_})$ produced. We show that only direct production of pions without isovector pairs leads to large isospin fluctuations.
Categories: hep-ph