Production of light antinuclei in heavy-ion collisions

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 p¯, n¯, d¯, 3He¯ 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 d¯ and 3He¯ is determined by the balance between created and disintegrated (mainly in collisions with pions) d¯ and 3He¯. The explicit formulae for coalescence parameters are presented and compared with the data. (author)