Measurement of jet suppression in central Pb-Pb collisions at root s(NN)=2.76 TeV

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Adam , J , Brucken , E J , Chang , B , Hilden , T E , Kim , D J , Kral , J , Mieskolainen , M M , Rak , J , Rasanen , S S , Snellman , T W , Trzaska , W H & The ALICE Collaboration 2015 , ' Measurement of jet suppression in central Pb-Pb collisions at root s(NN)=2.76 TeV ' Physics Letters B , vol. 746 , pp. 1-14 . DOI: 10.1016/j.physletb.2015.04.039

Title: Measurement of jet suppression in central Pb-Pb collisions at root s(NN)=2.76 TeV
Author: Adam, J.; Adamova, D.; Aggarwal, M. M.; Rinella, G. Aglieri; Agnello, M.; Agrawal, N.; Ahammed, Z.; Ahmed, I.; Ahn, S. U.; Aimo, I.; Aiola, S.; Ajaz, M.; Akindinov, A.; Alam, S. N.; Aleksandrov, D.; Alessandro, B.; Alexandre, D.; Molina, R. Alfaro; Alici, A.; Alkin, A.; Alme, J.; Alt, T.; Altinpinar, S.; Altsybeev, I.; Prado, C. Alves Garcia; Andrei, C.; Andronic, A.; Anguelov, V.; Anielski, J.; Anticic, T.; Antinori, F.; Antonioli, P.; Aphecetche, L.; Appelshauser, H.; Arcelli, S.; Armesto, N.; Arnaldi, R.; Aronsson, T.; Arsene, I. C.; Arslandok, M.; Brucken, E. J.; Chang, B.; Hilden, T. E.; Kim, D. J.; Kral, J.; Mieskolainen, M. M.; Rak, J.; Rasanen, S. S.; Snellman, T. W.; Trzaska, W. H.
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics (HIP) (-2009)
Date: 2015-06-30
Language: eng
Number of pages: 14
Belongs to series: Physics Letters B
ISSN: 0370-2693
URI: http://hdl.handle.net/10138/159975
Abstract: The transverse momentum(p(T)) spectrum and nuclear modification factor (R-AA) of reconstructed jets in 0-10% and 10-30% central Pb-Pb collisions at root s(NN) = 2.76 TeV were measured. Jets were reconstructed using the anti-k(T) jet algorithm with a resolution parameter of R = 0.2 from charged and neutral particles, utilizing the ALICE tracking detectors and Electromagnetic Calorimeter (EMCal). The jet p(T) spectra are reported in the pseudorapidity interval of \eta(jet)\ <0.5 for 40 <p(T), jet <120 GeV/c in 0-10% and for 30 <p(T), jet <100 GeV/c in 10-30% collisions. Reconstructed jets were required to contain a leading charged particle with p(T) > 5 GeV/c 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 R-AA. The nuclear modification factor R-AA was found to be 0.28 +/- 0.04 in 0-10% and 0.35 +/- 0.04 in 10-30% collisions, independent of p(T), jet 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. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V.
Subject: TRANSVERSE-MOMENTUM DEPENDENCE
CHARGED-PARTICLE PRODUCTION
INDUCED GLUON RADIATION
LEAD-LEAD COLLISIONS
PP COLLISIONS
ATLAS DETECTOR
COLLABORATION
PERSPECTIVE
PLASMA
MATTER
114 Physical sciences
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