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Title: Measurement of jet suppression in central Pb–Pb collisions at s NN = 2.76 TeV

Journal Article · · Physics Letters B
 [1]
  1. Czech Technical Univ. in Prague, Prague (Czech Republic). et al.

Here, the transverse momentum (pT) spectrum and nuclear modification factor (RAA) of reconstructed jets in 0–10% and 10–30% central Pb–Pb collisions at √sNN = 2.76 TeV were measured. Jets were reconstructed using the anti-kT 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 pT spectra are reported in the pseudorapidity interval of |ηjet| < 0.5 for 40 < pT,jet < 120 GeV/c in 0–10% and for 30 < pT,jet < 100 GeV/c in 10–30% collisions. Reconstructed jets were required to contain a leading charged particle with pT > 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 RAA. The nuclear modification factor RAA was found to be 0.28 ± 0.04 in 0–10% and 0.35 ± 0.04 in 10–30% collisions, independent of pT,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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
Alice Collaboration
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1338513
Journal Information:
Physics Letters B, Vol. 746, Issue C; ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

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Cited By (10)

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Study of jet-medium interactions using jet shape observables in heavy ion collisions at LHC energies with JEWEL journal August 2019
Kaon femtoscopy in Pb-Pb collisions at s NN = 2.76 TeV journal December 2017
Measurements of jet quenching with semi-inclusive hadron+jet distributions in Au + Au collisions at s N N = 200 GeV journal August 2017
Factorization of Jet Cross Sections in Heavy-Ion Collisions text January 2019
Jet overlap in heavy ion collisions at energies available at the CERN Large Hadron Collider and its consequences for the jet shape journal January 2020
Full jet in quark-gluon plasma with hydrodynamic medium response text January 2017
Anomalous Evolution of the Near-Side Jet Peak Shape in Pb-Pb Collisions at s N N = 2.76 TeV journal September 2017
Novel subjet observables for jet quenching in heavy-ion collisions journal June 2018
Decomposing transverse momentum balance contributions for quenched jets in PbPb collisions at s N N = 2.76 $$ \sqrt{s_{\mathrm{N}\;\mathrm{N}}}=2.76 $$ TeV journal November 2016


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