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

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