Modification of jet-like correlations in Pb-Au collisions at 158A GeV/c

Abstract

Results of a two-particle correlation analysis of high-$p_t$ charged particles in Pb-Au collisions at 158$A$ GeV/$c$ are presented. The data have been recorded by the CERES experiment at the CERN-SPS. The correlations are studied as function of transverse momentum, particle charge and collision centrality. We observe a jet-like structure in the vicinity of a high-$p_t$ trigger particle and a broad back-to-back distribution. The yields of associated particles per trigger show a strong dependence on the trigger/associate charge combination. A comparison to PYTHIA confirms the jet-like pattern at the near-side but suggests a strong modification at the away-side, implying significant energy transfer of the hard-scattered parton to the medium.

4 figures

References in corpus (4)

• PYTHIA 6.4 Physics and Manual
• Dihadron azimuthal correlations in Au+Au collisions at sqrt(s_NN)=200 GeV
• System Size and Energy Dependence of Jet-Induced Hadron Pair Correlation Shapes in Cu+Cu and Au+Au Collisions at sqrt(s_NN) = 200 and 62.4 GeV
• Charge Correlation in Near Side Hadron-Hadron Jets at sqrt(sNN)=200GeV in PHENIX

Cited by in corpus (5)

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• Novel Phenomena in Particle Correlations in Relativistic Heavy-Ion Collisions
• Modification of jet-like correlations in Pb-Au at the SPS