An Analytic Solution of Hydrodynamic Equations with Source Terms in   Heavy Ion Collisions
  The energy and baryon densities in heavy ion collisions are estimated by analytically solving a 1+1 dimensional hydrodynamical model with source terms. Particularly, a competition between the energy and baryon sources and the expansion of the system is discussed in detail. 
Pengfei Zhuang, Zhenwei Yang (Tsinghua University, Beijing)