Strange particle production in proton-proton collisions at root s=0.9 TeV with ALICE at the LHC

0376704 - ÚJF 2013 RIV DE eng J - Článek v odborném periodiku
Aamodt, K. - Quintana, A.A. - Adamová, Dagmar - Bielčíková, Jana - Kushpil, Svetlana - Kushpil, Vasilij - Mareš, Jiří A. - Polák, Karel - Šumbera, Michal - Závada, Petr … celkem 781 autorů
Strange particle production in proton-proton collisions at root s=0.9 TeV with ALICE at the LHC.
European Physical Journal C. Roč. 71, č. 3 (2011), 1594/1-1594/24. ISSN 1434-6044. E-ISSN 1434-6052
Grant CEP: GA MŠMT LC07048
Výzkumný záměr: CEZ:AV0Z10480505; CEZ:AV0Z10100521
Klíčová slova: PHI-MESON PRODUCTION * P(P)OVER-BAR COLLISIONS * PBARP INTERACTIONS
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií; BF - Elementární částice a fyzika vys. energií (FZU-D)
Impakt faktor: 3.631, rok: 2011

The production of mesons containing strange quarks (K(S)(0), phi) and both singly and doubly strange baryons (Lambda, (Lambda) over bar, and Xi(-) + (Xi) over bar (+)) are measured at mid-rapidity in pp collisions at root s = 0.9 TeV with the ALICE experiment at the LHC. The results are obtained from the analysis of about 250 k minimum bias events recorded in 2009. Measurements of yields (dN/dy) and transverse momentum spectra at mid-rapidity for inelastic pp collisions are presented. For mesons, we report yields (< dN/dy >) of 0.184 +/- 0.002(stat.) +/- 0.006(syst.) for K(S)(0) and 0.021 +/- 0.004(stat.) +/- 0.003(syst.) for phi. For baryons, we find < dN/dy > = 0.048 +/- 0.001(stat.) +/- 0.004(syst.) for Lambda, 0.047 +/- 0.002(stat.) +/- 0.005(syst.) for (Lambda) over bar and 0.0101 +/- 0.0020(stat.) +/- 0.0009(syst.) for Xi(-) + (Xi) over bar (+). The results are also compared with predictions for identified particle spectra from QCD-inspired models and provide a baseline for comparisons with both future pp measurements at higher energies and heavy-ion collisions.
Trvalý link: http://hdl.handle.net/11104/0209039