Abstract
The production probability ofπ-mesonic atom in high-energy nuclear collisions is estimated by a coalescence model. The production cross section is calculated forp+Ne and Ne+Ne systems at 2.1 GeV/A and 5.0 GeV/A beam energy. It is shown that nuclear fragments with larger charge numbers have the advantage in the formation ofπ-mesonic atoms. The cross section is proportional toZ 3 and of the order of magnitude of 1–10 μb in all the above cases. The production cross sections ofK-mesonic atoms are also estimated.
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The authors wish to express their gratitude to S. Hirenzaki and H. Toki for informing them to be negligible small of a relativistic effect of meson wave functions on the coalescence factor. This work is supported by the Grant-in-Aid for Special Project Research on Meson Science of Ministry of Education, Science and Culture of Japan.