The analytic results from a microscopic calculation for pion production in heavy-ion collisions at intermediate to relativistic energies both above and below pion threshold are presented and the most important terms that contribute to the pion spectrum are determined. The energy dependence and the effects on the pion spectrum due to the various parameters in the theory are examined. The model is applied to coherent pion-production in 16O + 12C collisions.

中文翻译：

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亚阈值和相对论重离子碰撞中相干介子产生的理论贡献。

给出了从微观计算得出的重离子碰撞中介电常数以上和以下的相对论能量中重离子碰撞中的离子产生的分析结果，并确定了有助于离子谱的最重要的项。研究了理论中各种参数对能量的依赖以及对介子谱的影响。该模型适用于16O + 12C碰撞中的相干介子产生。