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arXiv 0902.0865hep-ph
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1 - 2 A GeV的奇异性产生

Strangeness Production at 1 - 2 A GeV

H. Oeschler

摘要:

生产的K+和K-介子低于和NN阈值进行了总结,根据传输模型计算的数据进行比较。K+介子是与超子(例如λ)一起在涉及Delta共振的多步过程中产生的。这些过程主要发生在碰撞的高密度阶段,这使得K+的理想工具,以提取刚度的核物质状态方程,发现是相当软的压缩模量K低于240 MeV。相反,大部分K介子是通过奇异交换产生的.大多数产生的K-被吸收,幸存的K-在很晚的时候以低密度发射。

英文摘要:

The production of K+ and K- mesons below and at the NN threshold is summarized, based on a comparison of data with transport model calculations. K+ mesons are created in associate production together with hyperons (e.g. Lambda) in multi-step processes involving Delta resonances. These processes occur mainly during the high-density phase of the collision and this makes the K+ an ideal tool to extract the stiffness of the nuclear equation of state, found to be rather soft with a compressibility modulus K below 240 MeV. In contrast, the major part of K- mesons are produced via strangeness exchange. Most of the created K- are absorbed and the surviving ones are emitted quite late and at low densities.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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