Transverse momentum spectra of charged particles in proton-proton collisions at root s=900 GeV with ALICE at the LHC

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doi:10.1016/j.physletb.2010.08.026

The inclusive charged particle transverse momentum distribution is measured in proton-proton collisions at root s = 900 GeV at the LHC using the ALICE detector. The measurement is performed in the central pseudorapidity region (vertical bar eta vertical bar < 0.8) over the transverse momentum range 0.15 < p(T) < 10 GeV/c. The correlation between transverse momentum and particle multiplicity is also studied. Results are presented for inelastic (INEL) and non-single-diffractive (NSD) events. The average transverse momentum for vertical bar eta vertical bar < 0.8 is < p(T)>(INEL) = 0.483 +/- 0.001 (stat.) +/- 0.007 (syst.) GeV/c and < p(T)>(NSD) = 0.489 +/- 0.001 (stat.) +/- 0.007 (syst.) GeV/c, respectively. The data exhibit a slightly larger < p(T)> than measurements in wider pseudorapidity intervals. The results are compared to simulations with the Monte Carlo event generators PYTHIA and PHOJET. (C) 2010 Published by Elsevier B.V. RI Barnby, Lee/G-2135-2010; Pshenichnov, Igor/A-4063-2008; Christensen, Christian/A-4901-2010; ZGURA, Ion Sorin/C-4598-2011; Haiduc, Maria /C-5003-2011; Martinez Hernandez, Mario Ivan/F-4083-2010; Mitu, Ciprian/E-6733-2011; Mischke, Andre/D-3614-2011; Petta, Catia/A-7023-2012; Takahashi, Jun/B-2946-2012; Felea, Daniel/C-1885-2012; Sevcenco, Adrian/C-1832-2012; Chinellato, David/D-3092-2012; Christensen, Christian/D-6461-2012; Barbera, Roberto/G-5805-2012; Cortese, Pietro/G-6754-2012; beole', stefania/G-9353-2012; SCAPPARONE, EUGENIO/H-1805-2012; Aglieri Rinella, Gianluca/I-8010-2012