Near-side azimuthal and pseudorapidity correlations using neutral strange baryons and mesons in d + Au, Cu + Cu, and Au + Au collisions at √sNN=200 GeV

STAR Collaboration

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Abstract

We present measurements of the near side of triggered di-hadron correlations using neutral strange baryons (Λ,anti-Λ) and mesons (K0s) at intermediate transverse momentum (3 < pT < 6 GeV/c) to look for possible flavor and baryon-meson dependence. This study is performed in d+Au, Cu+Cu, and Au+Au collisions at √sNN=200 GeV measured by the STAR experiment at RHIC. The near-side di-hadron correlation contains two structures, a peak which is narrow in azimuth and pseudorapidity consistent with correlations from jet fragmentation, and a correlation in azimuth which is broad in pseudorapidity. The particle composition of the jet-like correlation is determined using identified associated particles. The dependence of the conditional yield of the jet-like correlation on the trigger particle momentum, associated particle momentum, and centrality for correlations with unidentified trigger particles are presented. The neutral strange particle composition in jet-like correlations with unidentified charged particle triggers is not well described by PYTHIA. However, the yield of unidentified particles in jet-like correlations with neutral strange particle triggers is described reasonably well by the same model.
Original languageEnglish
Article number014910
JournalPhysical Review C
Volume94
DOIs
Publication statusPublished - 28 Jul 2016

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