Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-09-15
J.Phys.G34:271-281,2007
Physics
Nuclear Physics
Nuclear Experiment
13 pages, 7 figures
Scientific paper
10.1088/0954-3899/34/2/008
Standard jet finding techniques used in elementary particle collisions have not been successful in the high track density of heavy-ion collisions. This paper describes a modified cone-type jet finding algorithm developed for the complex environment of heavy-ion collisions. The primary modification to the algorithm is the evaluation and subtraction of the large background energy, arising from uncorrelated soft hadrons, in each collision. A detailed analysis of the background energy and its event-by-event fluctuations has been performed on simulated data, and a method developed to estimate the background energy inside the jet cone from the measured energy outside the cone on an event-by-event basis. The algorithm has been tested using Monte-Carlo simulations of Pb+Pb collisions at $\sqrt{s}=5.5$ TeV for the ALICE detector at the LHC. The algorithm can reconstruct jets with a transverse energy of 50 GeV and above with an energy resolution of $\sim30%$.
Awes T.
Blyth Sarah-Louise
Cormier T.
Gray H.
Horner Mark J.
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