标题： 强子动量谱来自相对论流体力学的解析解 显示英文标题

标题： Hadron momentum spectra from analytical solutions of relativistic hydrodynamics

摘要： 我们给出具有圆柱对称性、纵向扩展具有平动不变性和横向扩展类似哈勃膨胀的系统的相对论流体力学的解析解。 我们还考虑类似哈勃膨胀的球对称系统的解析解。 对于这两种情况，我们利用Cooper-Frye公式，在恒定温度冻结超曲面下计算强子横向动量谱的解析表达式。 我们将横向动量谱的结果与大型强子对撞机和欧洲核子研究中心SPS的实验结果进行比较，其中分别预期为圆柱形和球形的火球几何结构。 在低能碰撞且具有球形几何结构的情况下，我们计算快度谱并与欧洲核子研究中心SPS的结果进行比较。 显示英文摘要

摘要： We present analytical solution of relativistic hydrodynamics for a system having cylindrical symmetry with boost-invariant longitudinal expansion and Hubble-like transverse expansion. We also consider analytical solution for Hubble-like spherically expanding system. For these two cases, we calculate analytical expression for transverse momentum spectra of hadrons, at constant temperature freeze-out hypersurface using Cooper-Frye prescription. We compare our results for transverse momentum spectra with experimental results from Large Hadron Collider and CERN SPS where one expects cylindrical and spherical geometry of the fireball, respectively. In the case of low-energy collisions with spherical geometry, we calculate rapidity spectra and compare with the results from CERN SPS.