Identified high pT particle correlation studies in central Au + Au collisions at sqrt(s) = 200 GeV

TL;DR

This study investigates high transverse momentum particle correlations in central gold-gold collisions at 200 GeV, revealing suppression patterns and potential differences in particle production mechanisms, with implications for understanding jet quenching and fragmentation.

Contribution

It provides new measurements of high pT strange baryon and meson correlations, highlighting differences in Lambda and Anti-Lambda dependencies and the absence of additional jet-like correlations at high pT.

Findings

Suppression of back-to-back correlations similar to previous unidentified hadron studies.

Different pT dependencies for Lambda and Anti-Lambda correlations suggest varied fragmentation or production mechanisms.

No evidence of additional jet-like correlations at high pT, consistent with statistical momentum conservation.

Abstract

We present azimuthal two particle correlations of high pt strange baryons and mesons with charged hadrons in Au+Au collisions at sqrt(s) =200 A GeV. We observe the suppression of the back to back correlations similar to the previous measurement of azimuthal correlations of unidentified charged hadrons in the central Au+Au collisions. The dependence of the suppression on the leading particle transverse momentum is presented. We find that Lambda and Anti-Lambda correlations with charged hadrons have different leading hadron pT dependencies for same side correlations, which could indicate different fragmentation functions for gluon and quark jets or non fragmentation mechanisms for particle production. In addition we show that the back-to-back correlation structure for charged hadron pairs with a high pT trigger (pT<8 GeV) is consistent with statistical momentum conservation, with no evidence of additional jet-like correlations. This is a summary of a poster presented at Quark Matter 2004.