Lectures on Landau Hydrodynamics

Understand

Landau hydrodynamics is a plausible description for the evolution of the dense hot matter produced in high-energy heavy-ion collisions.

• We review the formulation of Landau hydrodynamics to pave the way for its application in high-energy heavy-ion collisions.
• It is found that Landau's rapidity distribution needs to be modified to provide a better quantitative description.
• In particular, the rapidity distribution in the center-of-mass system should be more appropriately given as dN/dy \exp{\sqrt{y_b^2-y^2}}, where y_b=\ln{\sqrt{s_NN}/m_p} is the beam nucleon rapidity, instead of Landau's original result of dN/dy({Landau}) \exp{\sqrt{L^2-y^2}} where L=\ln{\sqrt{s_NN}/2m_p}.