arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1509.04092nucl-thhep-phnucl-ex
收藏

重离子碰撞中$K^*$介子丰度的减少

Reduction of the $K^*$ meson abundance in heavy ion collisions

Sungtae Cho, Su Houng Lee

备注：
12 pages, 8 figures
发表信息：
Phys. Rev. C 97, 034908 (2018)
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

通过研究强子效应对$K^*$介子丰度的影响，研究了重离子碰撞中$K^*$介子的约化。计算了强子物质中轻介子对$K^*$和$K$介子的吸收截面，并进一步研究了在重离子碰撞的强子阶段中两种粒子的介子丰度的变化.我们展示了强子介质中$K^*$介子和K介子与轻介子的相互作用之间的相互作用如何决定统计强子化模型与实验测量的最终产额差异。对于中心Au+Au碰撞在$\sqrt{s_{NN}}=200$ GeV，我们发现，在化学冻结$K^*/K$产额比减少$36\%$在强子物质的膨胀过程中，导致在最终的比率可比的STAR测量的0.23 $\pm0.05$。

英文摘要：

We study the $K^*$ meson reduction in heavy ion collisions by focusing on the hadronic effects on the $K^*$ meson abundance. We evaluate the absorption cross sections of the $K^*$ and $K$ meson by light mesons in the hadronic matter, and further investigate the variation in the meson abundances for both particles during the hadronic stage of heavy ion collisions. We show how the interplay between the interaction of the $K^*$ meson and kaon with light mesons in the hadronic medium determines the final yield difference of the statistical hadronization model to the experimental measurements. For the central Au+Au collision at $\sqrt{s_{NN}}=200$ GeV, we find that the $K^*/K$ yield ratio at chemical freeze-out decreases by $36\%$ during the expansion of the hadronic matter, resulting in the final ratio comparable to STAR measurements of 0.23 $\pm0.05$.

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。

↑