ShortNote

 Recently, STAR published the first measurements of v2 and v3 in central p+Au, d+Au and 3He+Au collisions via correlation between two charged particles which are both in middle rapidities(||<0.9).

 

Chart</p>
<p>Description automatically generatedRecently, STAR published the first measurements of v2 and v3 in central p+Au, d+Au and 3He+Au collisions via correlation between two charged particles which are both in middle rapidities(|h|<0.9).

 
Chart</p>
<p>Description automatically generated
Comparison of the ratios of v2 (panel a) and v3 (panel b) between a given small system and d+Au at similar <nch> for several pTselections. The solid lines indicate a fit to the data points, and the dashed lines indicate the corresponding eccentricity ratios obtained from Glauber-based model calculations with (ec, large dash line) and without (ea, small dashline) sub-nucleonic fluctuations, respectively.

Comparison of the ratios of v2 (panel a) and v3 (panel b) between a given small system and d+Au at similar <nch> for several pTselections. The solid lines indicate a fit to the data points, and the dashed lines indicate the corresponding eccentricity ratios obtained from Glauber-based model calculations with (ec, large dash line) and without (ea, small dashline) sub-nucleonic fluctuations, respectively.