Charged jet cross sections and properties in proton-proton collisions at √s = 7 TeV
ALICE Collaboration. (2015). Charged jet cross sections and properties in proton-proton collisions at √s = 7 TeV. Physical Review D, 91(11), Article 112012. https://doi.org/10.1103/PhysRevD.91.112012
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Physical Review DTekijät
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2015Tekijänoikeudet
© 2015 Authors. 2015 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of
the Creative Commons Attribution 3.0 License. Further distribution
of this work must maintain attribution to the author(s) and
the published article’s title, journal citation, and DOI.
The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in
minimum bias proton-proton collisions at center-of-mass energy ffiffi
s p ¼ 7 TeV using the ALICE detector at
the LHC. Jets are reconstructed from charged particle momenta in the midrapidity region using the
sequential recombination kT and anti-kT as well as the SISCone jet finding algorithms with several
resolution parameters in the range R ¼ 0.2–0.6. Differential jet production cross sections measured with
the three jet finders are in agreement in the transverse momentum (pT) interval 20 < pjet;ch
T < 100 GeV=c.
They are also consistent with prior measurements carried out at the LHC by the ATLAS Collaboration. The
jet charged particle multiplicity rises monotonically with increasing jet pT, in qualitative agreement with
prior observations at lower energies. The transverse profiles of leading jets are investigated using radial
momentum density distributions as well as distributions of the average radius containing 80% (hR80i) of the
reconstructed jet pT. The fragmentation of leading jets with R ¼ 0.4 using scaled pT spectra of the jet
constituents is studied. The measurements are compared to model calculations from event generators
(PYTHIA, PHOJET, HERWIG). The measured radial density distributions and hR80i distributions are well
described by the PYTHIA model (tune Perugia-2011). The fragmentation distributions are better described
by HERWIG.
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https://converis.jyu.fi/converis/portal/detail/Publication/24786707
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Ellei muuten mainita, aineiston lisenssi on © 2015 Authors. 2015 CERN, for the ALICE Collaboration. Published by the American Physical Society under the terms of
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