학술논문
Measurement of inclusive charged-particle b-jet production in pp and p-Pb collisions at sNN = 5.02 TeV
Document Type
Original Paper
Author
Source
Journal of High Energy Physics. 2022(1)
Subject
Language
English
ISSN
1029-8479
Abstract
Abstract: A measurement of the inclusive b-jet production cross section is presented in pp and p-Pb collisions at sNNRpPbb−jetsNN = 5.02 TeV, using data collected with the ALICE detector at the LHC. The jets were reconstructed in the central rapidity region |η| < 0.5 from charged particles using the anti-kT algorithm with resolution parameter R = 0.4. Identification of b jets exploits the long lifetime of b hadrons, using the properties of secondary vertices and impact parameter distributions. The pT -differential inclusive production cross section of b jets, as well as the corresponding inclusive b-jet fraction, are reported for pp and p-Pb collisions in the jet transverse momentum range 10 ≤ pT,ch jet ≤ 100 GeV/c, together with the nuclear modification factor, sNNRpPbb−jetsNN. The analysis thus extends the lower pT limit of b-jet measurements at the LHC. The nuclear modification factor is found to be consistent with unity, indicating that the production of b jets in p-Pb at sNNRpPbb−jetsNN = 5.02 TeV is not affected by cold nuclear matter effects within the current precision. The measurements are well reproduced by POWHEG NLO pQCD calculations with PYTHIA fragmentation.