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Title: Measurement of charged jet cross section in pp collisions at s =5.02 TeV

Journal Article · · Physical Review. D.
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The cross section of jets reconstructed from charged particles is measured in the transverse momentum range of 5< p T <100 GeV/c in pp collisions at the center-of-mass energy of s =5.02 TeV with the ALICE detector. The jets are reconstructed using the anti- k T algorithm with resolution parameters R=0.2 , 0.3, 0.4, and 0.6 in the pseudorapidity range |η|<0.9-R . The charged jet cross sections are compared with the leading-order (LO) and to next-to-leading-order (NLO) perturbative quantum chromodynamics (pQCD) calculations. It is found that the NLO calculations agree better with the measurements. The cross section ratios for different resolution parameters are also measured. These ratios increase from low p T to high p T and saturate at high p T , indicating that jet collimation is larger at high p T than at low p T . These results provide a precision test of pQCD predictions and serve as a baseline for the measurement in Pb-Pb collisions at the same energy to quantify the effects of the hot and dense medium created in heavy-ion collisions at the LHC.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
ALICE Collaboration; A Large Ion Collider Experiment (ALICE) Collaboration
Grant/Contract Number:
AC05-00OR22725; AC02-05CH11231
OSTI ID:
1574075
Alternate ID(s):
OSTI ID: 1582629; OSTI ID: 1821991
Journal Information:
Physical Review. D., Vol. 100, Issue 9; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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