The formation mechanism of hyperfragments with strangeness s = -1 and s = -2 in collisions of antikaons on nuclei has been investigated within a microscopic transport model. Dynamics of pseudoscalar mesons and hyperons is modeled within the transport model, in which all possible reaction channels for creating hyperons such as the elastic scattering, resonance production and decay, strangeness exchange reaction, and direct strangeness production in meson-baryon and baryon-baryon collisions have been included. A coalescence approach is used for constructing hyperfragments in phase space and the statistical model is modified to describe the decay of hyperfragments. It is found that the Xi(-) production is correlated to the K+ dynamics. The hyperons Lambda and Sigma are created within a broad rapidity region. The production cross sections of nucleonic fragments and hyperfragments weakly depends on the incident momentum. The yields of Lambda hyperfragments are the sixth order of magnitude of Xi(-) hyperfragments. Possible experiments on the hypernuclear physics at the high-intensity heavy-ion accelerator facility (HIAF) in China are discussed.
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