Free access article

Issue Eur. Phys. J. C Volume 61, Number 4, June 2009 Hard Probes 2008 Page(s) 761 - 767 Section Regular Article - Experimental Physics DOI 10.1140/epjc/s10052-009-0880-y Published online 05 February 2009

Eur. Phys. J. C 61, 761-767 (2009)
DOI: 10.1140/epjc/s10052-009-0880-y

First direct measurement of jets in heavy ion collisions by STAR

Sevil Salur

Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS-70R0319, Berkeley, CA, 94720, USA

ssalur@lbl.gov

Received 8 September 2008 / Revised version 14 December 2008 / Published online 5 February 2009

Abstract

We present the first measurement of reconstructed jets in ultra-relativistic heavy ion collisions. Utilizing the large coverage of the STAR Time Projection Chamber and Electromagnetic Calorimeter, we apply several modern jet reconstruction algorithms and background subtraction techniques and explore their systematic uncertainties in heavy ion events. The differential energy spectrum for inclusive jet production in central Au+Au collisions at is presented. In order to assess the jet reconstruction biases, this spectrum is compared with the jet cross section measured in  GeV p+p collisions scaled by the number of binary N–N collisions to account for nuclear geometric effects.

Correspondence: ssalur@lbl.gov


© Società Italiana di Fisica, Springer-Verlag 2009

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