Measurement of jet suppression in central Pb-Pb collisions at √sNN=2.76 TeV
Adam, Jaroslav; Adamová, Dagmar; Aggarwal, Madan M.; Aglieri Rinella, Gianluca; Agnello, Michelangelo; Agrawal, Nikita; Ahammed, Zubayer; Ahmed, Ijaz; Ahn, Sang Un; Aimo, Ilaria; Alme, Johan; Helstrup, Håvard; Hetland, Kristin Fanebust; Kileng, Bjarte; Altinpinar, Sedat; Djuvsland, Øystein; Haaland, Øystein Senneset; Huang, Meidana; Lønne, Per-Ivar; Nystrand, Joakim; Rehman, Attiq ur; Røhrich, Dieter; Ullaland, Kjetil; Velure, Arild; Wagner, Boris; Zhou, Zhuo; Arsene, Ionut Christian; Bätzing, Paul Christoph; Dordic, Olja; Lindal, Svein; Mahmood, Sohail Musa; Milosevic, Jovan; Qvigstad, Henrik; Richter, Matthias; Røed, Ketil; Skaali, Toralf Bernhard; Tveter, Trine Spedstad; Wikne, Jon Christopher; Zhao, Chengxin; Langøy, Rune; Lien, Jørgen; Aiola, Salvatore; Ajaz, Muhammad; Akindinov, Alexander; Alam, Sk Noor; Aleksandrov, Dimitry; Alessandro, Bruno; Alexandre, Didier; Alfaro, Molina; ALICE, Collaboration
Journal article, Peer reviewed
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Original versionPhysics Letters B. 2015, 746, 1-14. 10.1016/j.physletb.2015.04.039
The transverse momentum (pt) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0 – 10 % and 10 – 30 % central Pb – Pb collisions at were measured. Jets were reconstructed using the anti- jet algorithm with a resolution parameter of from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet spectra are reported in the pseudorapidity interval of for in 0 – 10 % and for in 10 – 30 % collisions. Reconstructed jets were required to contain a leading charged particle with to suppress jets constructed from the combinatorial background in Pb – Pb collisions. The leading charged particle requirement applied to jet spectra both in pp and Pb – Pb collisions had a negligible effect on the . The nuclear modification factor was found to be in 0 – 10 % and in 10 – 30 % collisions, independent of within the uncertainties of the measurement. The observed suppression is in fair agreement with expectations from two model calculations with different approaches to jet quenching.