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Direct observation of dijets in central Au+Au collisions with STAR

โœ Scribed by Dan Magestro

Publisher
Elsevier Science
Year
2006
Tongue
English
Weight
189 KB
Volume
774
Category
Article
ISSN
0375-9474

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โœฆ Synopsis

We present first results of azimuthal (ฮ”ฯ†) correlations of high transverse momentum (p T ) hadrons from the high-statistics Au+Au dataset collected at RHIC in 2004. Previous correlations measurements observed the disappearance of back-to-back (ฮ”ฯ† โˆผ ฯ€) correlations in central Au+Au collisions, supporting the emerging picture of parton energy loss in dense QCD matter. In the present analysis, increasing the p T thresholds reveals a narrow back-to-back dijet peak which emerges above the decreasing combinatoric background. We study the possible medium modification of the dijet fragmentation function and compare to models, to place constraints on the nature and magnitude of in-medium energy loss.

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