volume 42, issue 5, P1764-1776 1990
DOI: 10.1103/physrevd.42.1764
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Abstract: Excited hadronic matter in the temperature interval T = 100-200 MeV is not an ideal pion gas, but rather a liquid, in which attractive interaction among particles plays an important role. The pion dispersion curve is in this case essentially modified by a kind of collective momentumdependent potential, which becomes important as the "quasipion" comes to the boundary of the system. We show that these effects can provide an explanation for a number of recent experimental puzzles, in particular, for the observed…

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