Charged jet cross sections and properties in proton-proton measured in detail in proton-antiproton (pp ̄) collisions at pffiffi the Tevatron ( s 1⁄4 540 GeV, 630 GeV, 1.8 TeV and 1.96 TeV) [1–11]. Measurements were also carried out pffiffi recently at the CERN LHC at higher energies ( s 1⁄4 2.76, and transverse jet shape observables in pp collisions at 7 and 8 TeV) in proton-proton (pp) collisions [12–15]. Jet shape observables were previously measured by the CDF [16–18] and D0  Collaborations in pp ̄ collisions and more recently by the ATLAS and CMS Collaborations in pp collisions [20–22]. The fragmentation functions of jets produced in pp ̄ collisions were reported by the CDF Collaboration . Jet fragmentation in pp and Pb–Pb collisions at the LHC were reported by the ATLAS [12,24,25] and CMS  Collaborations. Jet production in eþe−, ep, pp ̄, and pp collisions is well described by perturbative Quantum Chromodynamics (pQCD) calcula- tions. The measured jet properties are typically well reproduced by Monte Carlo (MC) generators such as *Full author list given at end of the article. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distri- bution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. pffiffi s 1⁄4 7 TeV. The analysis is restricted to charged par- pffiffi collisions at s 1⁄4 7 TeV
Karasu Uysal, Ayben; ALICE, Collaboration
The differential charged jet cross sections, jet fragmentation distributions, and jet shapes are measured in pffiffi minimum bias proton-proton collisions at center-of-mass energy s 1⁄4 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 1⁄4 0.2–0.6. Differential jet production crross sections measured with the three jet finders are in agreement in the transverse momentum (p ) interval 20 < pjet;ch < 100 GeV=c. TT 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 1⁄4 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.... Show more Show less
Keywordjet cross sections, ALICE, LHC
Showing items related by title, author, creator and subject.
Karasu Uysal, Ayben; ALICE, Collaboration (2015)The measurement of primary π ± , K ± , p and p production at mid-rapidity (|y| < 0.5) in proton–proton col- lisions at √s = 7 TeV performed with a large ion collider experiment at the large hadron collider (LHC) is reported. ...
Exclusive J=ψ Photoproduction off Protons in Ultraperipheral p-Pb Collisions pffiffiffiffiffiffiffi exclusive J=ψ photoproduction in collisions of protons at sNN 1⁄4 5.02 TeV Karasu Uysal, Ayben; ALICE, Collaboration (2014)We present the first measurement at the LHC of exclusive J=ψ photoproduction off protons, in pffiffiffiffiffiffiffi ultraperipheral proton-lead collisions at sNN 1⁄4 5.02 TeV. Events are selected with a dimuon pair produced ...
Karasu Uysal, Ayben; ALICE, Collaboration (2015)The production of the strange and double-strange baryon resonances (�����(1385)±, �����(1530)0) has been mea- sured at mid-rapidity (|y|< 0.5) in proton–proton collisions at √s = 7 TeV with the ALICE detector at the LHC. ...