Effects of Final-State Interaction and Screening on Strange- and Heavy-Quark Production
Abstract
Final-state interaction and screening have a great influence on q q production cross sections, which are important quantities in many problems in quark-gluon plasma physics. They lead to an enhancement of the cross section for a q q color-singlet state and a suppression for a color-octet state. The effects are large near the production threshold. The presence of screening gives rise to resonances for q q production just above the threshold at specific plasma temperatures. These resonances, especially c c and b b resonances, may be utilized to search for the quark-gluon plasma by studying the temperature dependence of heavy-quark pair production just above the threshold.
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