Abstract
The antideuteron and antihelium-3 production rates in high-energy heavy-ion collisions are calculated in the framework of fusion mechanism. It is supposed that [Formula: see text] participating in the fusion are moving in the mean field of other fireball constituents. It is demonstrated that at high energies, where many pions are present in the fireball, the number of produced [Formula: see text] and [Formula: see text] is determined by the balance between created and disintegrated (mainly in collisions with pions) [Formula: see text] and [Formula: see text]. The explicit formulae for coalescence parameters are presented and compared with the data.
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