论文标题
在一些GEV能量状态下重离子碰撞的统计强调模型
Statistical hadronization model for heavy-ion collisions in a few GeV energy regime
论文作者
论文摘要
我们表明，在SQRT（SNN）= 2.4 GEV中，在热力学模型中可以很好地再现在SQRT（SNN）上的Au-Au碰撞中产生的质子和速度光谱，假设从球形对称性超脑表面上单一冷冻颗粒，则可以很好地再现。这种情况对应于西门子和拉斯穆森在Blast-Wave模型的原始配方中使用的物理图片。我们的框架通过纳入类似QCD物质的哈勃样扩展并包含共振衰减来修改和扩展这种方法。特别是，考虑了三角洲（1232）的共振，并从病毒扩张中获得宽度。总的来说，我们的结果为在某种GEV能量状态及其几乎球形扩张中的重离子碰撞中产生的物质进行了大量的热量提供了证据。
We show that the transverse-mass and rapidity spectra of protons and pions produced in Au-Au collisions at sqrt(sNN) = 2.4 GeV can be well reproduced in a thermodynamic model assuming single freeze-out of particles from a spherically symmetric hypersurface. This scenario corresponds to a physical picture used by Siemens and Rasmussen in the original formulation of the blast-wave model. Our framework modifies and extends this approach by incorporation of a Hubble-like expansion of QCD matter and inclusion of resonance decays. In particular, the Delta(1232) resonance is taken into account, with a width obtained from the virial expansion. Altogether, our results bring evidence for substantial thermalization of the matter produced in heavy-ion collisions in a few GeV energy regime and its nearly spherical expansion.
