Single-inclusive production of large-pT charged particles in hadronic collisions at TeV energies and perturbative QCD predictions

Abstract

The single inclusive spectrum of charged particles with transverse momenta pT=3-150 GeV/c measured at midrapidity by the CDF experiment in proton-antiproton (p-pbar) collisions at sqrt(s)=1.96 TeV is compared to next-to-leading order (NLO) perturbative QCD calculations using the most recent parametrizations of the parton distributions and parton-to-hadron fragmentation functions. Above pT~20 GeV/c, there is a very sizeable disagreement of the Tevatron data compared to the NLO predictions and to xT-scaling expectations, suggesting a problem in the experimental data. We also present the predictions for the pT-differential charged hadron spectra and the associated theoretical uncertainties for proton-proton (p-p) collisions at LHC energies (sqrt(s)=0.9-14 TeV). Two procedures to estimate the charged hadron spectra at LHC heavy-ion collision energies (sqrt(s)=2.76,5.5 TeV) from p-p measurements are suggested.

23 pages, 9 figures. A few text additions. Accepted for publication in JHEP

References in corpus (6)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Transverse momentum and pseudorapidity distributions of charged hadrons in pp collisions at sqrt(s) = 0.9 and 2.36 TeV
• Measurement of the inclusive jet cross section in $p\bar{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$
• Heavy Flavour Hadro-Production from Fixed-Target to Collider Energies
• (medium-modified) Fragmentation Functions

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• Nuclear effects on the transverse momentum spectra of charged particles in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV
• Inclusive Hadron Production in the CERN-LHC Era
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• Hard Probe of Geometry and Fluctuations in Heavy Ion Collisions at $\sqrt{s_{{}_{NN}}}=$ 0.2, 2.76, and 5.5 TeV
• Centrality and pT dependence of charged particle RAA in PbPb collisions at sqrt(sNN) = 2.76 TeV
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• Ratios of jet and hadron spectra at LHC energies: measuring high-$p_T$ suppression without a $pp$ reference
• Quenching of hadron and photon spectra in heavy-ion collisions from RHIC to LHC
• Light neutral-meson production in pp collisions at $\sqrt{\mathbf{s}}$ = 13 TeV