Measurements of jet structure and fragmentation from full jet reconstruction in heavy ion collisions at RHIC

Abstract

Measurements of inclusive hadron suppression and di-hadron azimuthal correlations have provided important insights into jet quenching in hot QCD matter. However, they do not provide access to the energy of the hard scattering and are limited in their sensitivity since they can be affected by biases toward hard fragmentation and small energy loss. Full jet reconstruction in heavy-ion collisions enables a complete study of the modification of jet structure due to energy loss, but is challenging due to the high-multiplicity environment. We present measurements of fully reconstructed di-jets at mid-rapidity in 200 GeV p+p and central Au+Au collisions performed with the STAR detector. We compare fragmentation functions measured in 200 GeV p+p and central Au+Au collisions and assess the systematic uncertainties of their ratio.

Proceedings of Quark Matter 09 Conference

References in corpus (3)

• Jet hadrochemistry as a characteristics of jet quenching
• First Direct Measurement of Jets in $\sqrt{s_{NN}}=200$ GeV Heavy Ion Collisions by STAR
• Distorting the Hump-backed Plateau of Jets with Dense QCD Matter

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• Heavy-ion physics at the LHC: Review of Run I results
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• Jet Fragmentation Function Moments in Heavy Ion Collisions
• Transport Theoretical Description of Collisional Energy Loss in Infinite Quark-Gluon Matter
• Underlying Event Studies at RHIC
• Jets and jet-like correlations studies from STAR
• Jets in 200 GeV p+p and d+Au collisions from the STAR experiment at RHIC
• Jet studies in 200 GeV p+p and d+Au collisions from the STAR experiment at RHIC
• Color Decoherence in In-Medium QCD Cascades
• Measurements of di-jets in p+p and Au+Au in the STAR experiment
• Overview on jet results from STAR
• Jet measurements in p+p and d+Au collisions with STAR at RHIC