Speakers
Description
How collectivity originates and evolves in the collisions of small-size systems is a highly debated topic in the heavy-ion community. The evolution may be associated with both hydrodynamic and non-hydrodynamic modes. Furthermore, the uncertainties in the description of initial geometry and fluctuations at the sub-nucleonic scale will significantly degrade the predictive power of the available dynamical evolution models.
In this talk, we will present the measurements of flow harmonics ($v_2$, $v_3$) in p+Au, d+Au and $^3$He+Au collisions at 200 GeV in STAR. With the advantage of wide rapidity coverage of the Time Projection Chamber (-1$<\eta <$1), the flow coefficients are extracted via di-hadron correlations at mid-pseudorapidity with a relative pseudorapidity separation of $|\Delta\eta|>$ 1.0. The kinematics of our measurements can help avoid decorrelation and provide a benchmark to compare with boost-invariant models. Such measurements will also provide useful information to understand the effect of nucleonic vs. sub-nucleonic fluctuation on the initial geometry in the small collision systems.
| What kind of work does this abstract pertain to? | Experimental |
|---|---|
| Which experiment is this abstract related to? | STAR |
