A Cone Jet-Finding Algorithm for Heavy-Ion Collisions at LHCEnergies

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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 ... continued below

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Blyth, S.-L.; Horner, M.J.; Awes, T.C.; Cormier, T.; Gray, H.M.; Klay, J.L. et al. July 27, 2006.

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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 {radical}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 {approx} 30%.

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  • Journal Name: Journal of Physics G; Journal Volume: 34; Journal Issue: 2; Related Information: Journal Publication Date: 02/2007

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  • Report No.: LBNL--61277
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 928573
  • Archival Resource Key: ark:/67531/metadc894131

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  • July 27, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 30, 2016, 1:04 p.m.

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Blyth, S.-L.; Horner, M.J.; Awes, T.C.; Cormier, T.; Gray, H.M.; Klay, J.L. et al. A Cone Jet-Finding Algorithm for Heavy-Ion Collisions at LHCEnergies, article, July 27, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc894131/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.