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

• Published in: Physics letters. B Vol. 693; no. 2; p. 53
• Main Authors: Aamodt, Kenneth, Abramyan, A, Altini, V, Anticic, T, Antipin, K, Bagnasco, S, Benhabib, L, Bianchi, N, Bock, N, Bortolin, C, Bregant, M, Breitner, T, Budnikov, D, Caffarri, D, Catanescu, V, Cavicchioli, C, Cifarelli, L, Cindolo, F, Morales, YC, Cotallo, ME, Crescio, E, Dash, S, De Caro, A, de Vaux, G, Delagrange, H, Di Bari, D, Espagnon, B, Fenton-Olsen, B, Furget, C, Germain, M, Gheata, A, Gonzalez-Trueba, LH, Grajcarek, R, Grigoriev, V, Guernane, R, Gupta, R, Gustafsson, HA, Ippolitov, M, Ivanov, A, Jancurova, L, Jung, W, Kaidalov, AB, Kamermans, R, Kowalski, M, Kox, S, Kozlov, K, Kramer, F, Kravcakova, A, Krumbhorn, D, Lafage, V, Lazzeroni, C, Lee, SC, Leon, H, Lu, S, Mal'Kevich, D, Margagliotti, GV, Morsch, A, Moukhanova, T, Munhoz, MG, Navin, S, Nicassio, M, Nooren, G, Nygaard, C, Pal, S, Papikyan, V, Pepato, A, Pillot, P, Piuz, F, Pocheptsov, Timur, Pop, A, Pulvirenti, A, Rakotozafindrabe, A, Raniwala, R, Read, KF, Ricaud, H, Roy, C, Sakata, D, Scarlassara, F, Schuchmann, S, Schutz, Y, Senyukov, S, Shabratova, G, Silenzi, A, Skaali, Toralf Bernhard, Smakal, R, Stachel, J, Stenlund, E, Suire, C, Tadel, M, Tanabe, R, Taureg, H, Terrevoli, C, Tieulent, R, de Matos, CT, Toscano, L, Tsiledakisar, G, Tumkin, A, Varma, R, Vechernin, V, Vetlitskiy, I
• Format: Journal Article
• Language: English
• Published: North-Holland 2010
• Subjects: 900 GeV; ALICE; Fysik; LHC; Natural Sciences; Naturvetenskap; Physical Sciences; PYTHIA; Subatomic Physics; Subatomär fysik; Transverse momentum
• ISSN: 0370-2693; 1873-2445
• 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.