Why is the radial flow in high multiplicity pp/pA stronger than in AA?

May 19, 2014, 12:40 PM
20m
europium (darmstadtium)

europium

darmstadtium

Contributed Talk Collective Dynamics Collective dynamics

Speaker

Edward Shuryak (stony brook university)

Description

With growing multiplicity, the pp and pA collisions enter the domain where the macroscopic description (thermodynamics and hydrodynamics) becomes applicable. We discuss this situation, first with simplified thought experiments, then with some idealized representative cases, and finally address the real data. For clarity, we don't do it numerically but analytically, using the Gubser solution. We found that the radial flow is expected to increase from central AA to central pA. Recent CMS and ALICE data confirm that it is the case. We discuss the consequences of these finding.

Primary author

Edward Shuryak (stony brook university)

Presentation materials