pi-Xi correlations in d+Au and Au+Au collisions at STAR
Petr Chaloupka (for STAR collaboration)
TL;DR
This paper compares the source sizes and emission point shifts of pi and Xi particles in d+Au and Au+Au collisions at different energies, revealing that Xi sources are smaller and shifted relative to pions.
Contribution
It provides the first quantitative analysis of pi-Xi source sizes and emission shifts in high-energy nuclear collisions.
Findings
Xi source is smaller than pion source.
Significant transverse shift of Xi emission points.
Differences observed between collision systems and energies.
Abstract
Qualitative comparison of source sizes from pi-Xi correlations analyses in d+Au and Au+Au collisions at sqrt(s_NN)=200G GeV and sqrt(s_NN)=62 GeV is presented. For the most central Au+Au collisions at sqrt(s_NN)=200 GeV we report first quantitative results concerning size of the pi-Xi source and relative shift of the average emission points between pi and Xi showing that the homogeneity region of Xi source is smaller then that of pion and significantly shifted in the transverse direction.
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