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

被引:19
作者
Arleo, Francois [1 ]
d'Enterria, David [2 ,3 ]
Yoon, Andre S. [4 ]
机构
[1] Univ Savoie, CNRS, LAPTH, Lab Annecy le Vieux Phys Theor,UMR5108, F-74941 Annecy Le Vieux, France
[2] Univ Barcelona, ICREA, E-08028 Barcelona, Catalonia, Spain
[3] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Catalonia, Spain
[4] MIT, Nucl Sci Lab, Cambridge, MA 02139 USA
关键词
NLO Computations; Hadronic Colliders; PARTON DISTRIBUTIONS; CROSS-SECTIONS;
D O I
10.1007/JHEP06(2010)035
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The single inclusive spectrum of charged particles with transverse momenta p(T) = 3 - 150 GeV/c measured at midrapidity by the CDF experiment in proton-antiproton (p-(p) over bar p) collisions at root 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 p(T) approximate to 20 GeV/c, there is a very sizeable disagreement of the Tevatron data compared to the NLO predictions and to x(T)-scaling expectations, suggesting a problem in the experimental data. We also present the predictions for the p(T)-differential charged hadron spectra and the associated theoretical uncertainties for proton-proton (p-p) collisions at LHC energies (root s = 0.9-14 TeV). Two procedures to estimate the charged hadron spectra at LHC heavy-ion collision energies (root s = 2.76, 5.5 TeV) from p-p measurements are suggested.
引用
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页数:25
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