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arXiv 1708.05784hep-phnucl-th
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$K$和$K^*$的吸收截面和产生截面

On the absorption and production cross sections of $K$ and $K^*$

A. Martinez Torres, K. P. Khemchandani, L. M. Abreu, F. S. Navarra, M. Nielsen

发表信息：
Phys. Rev. D 97, 056001 (2018)
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摘要：

我们计算了重离子碰撞过程$πK^*\to ρK$和$ρK^*\to πK$的同位旋和自旋平均截面，这两个过程对确定重离子碰撞过程中$K^*$和$K$的丰度是至关重要的.改进以前的计算，我们已经考虑了几个机制，如轴向和矢量共振的交换（$K_1(1270)$，$K^*_2(1430)$，$h_1(1170)$等.）以及其它工艺如$πK^*\to ωK, ϕK$和$ωK^*,\,ϕK^*\to πK$。我们发现，这些机制中的一些横截面的重要贡献。我们的研究结果还表明，在强子气体中，$K^*$的产生可能比它的吸收更重要。

英文摘要：

We have computed the isospin and spin averaged cross sections of the processes $πK^*\to ρK$ and $ρK^*\to πK$, which are crucial in the determination of the abundances of $K^*$ and $K$ in heavy ion collisions. Improving previous calculations, we have considered several mechanisms which were missing, such as the exchange of axial and vector resonances ($K_1(1270)$, $K^*_2(1430)$, $h_1(1170)$, etc...) and also other processes such as $πK^*\to ωK, ϕK$ and $ωK^*,\,ϕK^*\to πK$. We find that some of these mechanisms give important contributions to the cross section. Our results also suggest that, in a hadron gas, $K^*$ production might be more important than its absorption.

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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