Collectivity in small systems: Initial correlations or final state flow?

16th International Conference on Strangeness in Quark Matter

Schenke, Björn^1

Physics Department, Brookhaven National Laboratory, Upton

NY

11973, United States^1

关键词: Color glass condensates;    Correlation measurement;    Final state interactions;    Initial-state effects;    Large Hadron collider LHC;    Multi-particle correlation;    Relativistic Heavy Ion Collider;    Theoretical approach;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/779/1/012011/pdf
DOI  :  10.1088/1742-6596/779/1/012011

来源: IOP

【 摘 要 】

I review recent progress in understanding correlation measurements in small collision systems, such as proton+lead and proton+proton collisions at the Large Hadron Collider (LHC) and proton+gold, deuteron+gold, and3He+gold collisions at the Relativistic Heavy Ion Collider (RHIC). I discuss two distinct theoretical approaches to describing the experimental data on multi-particle correlations. The first attributes the origin of the measured correlations to strong final state interactions, often described by hydrodynamics, the second employs the color glass condensate effective theory and is able to reproduce many features of the data from initial state effects only. I discuss how to distinguish which of the two sources of correlations dominates the experimental observables, and give an outlook on how to make progress on the theory side.