论文标题
在$ e _ {\ rm kin} = 1.58a $ gev中的AGAG碰撞中的粒子产生
Particle Production in AgAg Collisions at $E_{\rm Kin}=1.58A$ GeV within a Hadronic Transport Approach
论文作者
论文摘要
低光束能量处的重离子碰撞探索了强烈相互交互的高密度状态。这些碰撞的动态演变可以通过HADRONON运输方法成功描述。 2019年3月，Hades Collaboration在$ e _ {\ rm kin} = 1.58a $ gev中获取了AGAG碰撞的数据，在这项工作中，我们为模拟许多加速强度相互互动的Hadron（Smash）方法提供了粒子生产和光谱的预测。奇怪和非震撼粒子的多重性和光谱遵循预期趋势，这是系统大小的函数。特别是，在AUAU碰撞中，通过实验观察到比热模型预期的双重震动重子的产率要高得多。因此，我们结合了一种先前建议的机制，可以通过罕见的高质量$ n^*$共振产生$ξ$ baryons并预测多重性。此外，我们预测了DILEPTON发射的不变质谱，并探索了1 GEV以上的最重要的障碍来源，这些障碍者预期表明培养基的温度。有趣的是，总体DILEPTON发射与AUAU碰撞中的$ 1.23 A $ GEV非常相似，这暗示着较小能量的较小系统的行为与较低的梁能量下的较大系统非常相似。
Heavy-ion collisions at low beam energies explore the high density regime of strongly-interacting matter. The dynamical evolution of these collisions can be successfully described by hadronic transport approaches. In March 2019, the HADES collaboration has taken data for AgAg collisions at $E_{\rm Kin}=1.58A$ GeV and in this work, we provide predictions for particle production and spectra within the Simulating Many Accelerated Strongly-interacting Hadrons (SMASH) approach. The multiplicities and spectra of strange and non-strange particles follow the expected trends as a function of system size. In particular, in AuAu collisions, much higher yields of double-strange baryons were observed experimentally than expected from a thermal model. Therefore, we incorporate a previously suggested mechanism to produce $Ξ$ baryons via rare decays of high mass $N^*$ resonances and predict the multiplicities. In addition, we predict the invariant mass spectrum for dilepton emission and explore the most important sources of dileptons above 1 GeV, that are expected to indicate the temperature of the medium. Interestingly, the overall dilepton emission is very similar to the one in AuAu collisions at $1.23 A$ GeV, a hint that the smaller system at a higher energy behaves very similar to the larger system at lower beam energy.
