标题： 反 kaon 产生和重离子碰撞中的介质效应@AGS 显示英文标题

标题： Antikaon Production and Medium Effects in Heavy Ion Collisions at AGS

摘要： 在布鲁克海文国家实验室的交替梯度同步加速机（AGS）提供的能量下研究重离子碰撞中的反K介子产生，使用了相对论输运（ART）模型。我们包含了由重子-重子、介子-重子以及介子-介子相互作用的贡献。还考虑了反K介子通过核子和π介子吸收及弹性散射的最终态相互作用。为了与目前可用或未来的实验数据进行比较，我们计算了反K介子的快度分布和横向动量分布及其集体流。还研究了由于平均场势导致的这些可观测量的介质效应。发现反K介子横向动量谱与K介子横向动量谱的比值及其横向流最能反映K介子和反K介子的介质性质。 显示英文摘要

摘要： Antikaon production from heavy ion collisions at energies available from the Alternating Gradient Synchrotron (AGS) at the Brookhaven National Laboratory is studied in a relativistic transport (ART) model. We include contributions from the baryon-baryon, meson-baryon, and meson-meson interactions. The final-state interaction of antikaons via both absorption and elastic scattering by nucleons and pions are also considered. To compare with presently available or future experimental data, we have calculated the antikaon rapidity and transverse momentum distributions as well as its collective flow. Medium effects on these observables due to mean field potentials have also been investigated. It is found that the ratio of antikaon transverse momentum spectrum to that of kaon and their transverse flow are most sensitive to the in-medium properties of kaons and antikaons.