A1 Journal article (refereed)
Measurement of charged jet cross section in pp collisions at √s = 5.02 TeV (2019)

ALICE Collaboration. (2019). Measurement of charged jet cross section in pp collisions at √s = 5.02 TeV. Physical Review D, 100(9), Article 092004. https://doi.org/10.1103/PhysRevD.100.092004

JYU authors or editors

Publication details

All authors or editors: ALICE Collaboration

Journal or series: Physical Review D

ISSN: 2470-0010

eISSN: 2470-0029

Publication year: 2019

Volume: 100

Issue number: 9

Article number: 092004

Publisher: American Physical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevD.100.092004

Publication open access: Openly available

Publication channel open access: Partially open access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67081

Publication is parallel published: https://arxiv.org/abs/1905.02536

Abstract

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 root 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 vertical bar eta vertical bar < 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.

Keywords: particle physics

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2019

JUFO rating: 2