Production of pions, kaons and protons in pp collisions at √ s = 900 GeV with ALICE at the LHC

0374463 - FZÚ 2013 RIV DE eng J - Journal Article
Aamodt, K. - Abel, N. - Abeysekara, U. - Quintana, A.A. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Kushpil, Svetlana - Kushpil, Vasilij - Mareš, Jiří A. - Polák, Karel - Šumbera, Michal - Tlustý, D. - Wagner, V. - Závada, Petr … Total 1062 authors
Production of pions, kaons and protons in pp collisions at √ s = 900 GeV with ALICE at the LHC.
European Physical Journal C. Roč. 71, č. 6 (2011), 1-22. ISSN 1434-6044. E-ISSN 1434-6052
R&D Projects: GA MŠMT LA08015
Institutional research plan: CEZ:AV0Z10100502; CEZ:AV0Z10480505
Keywords : CERN * ALICE * LHC * pp collisions
Subject RIV: BF - Elementary Particles and High Energy Physics
Impact factor: 3.631, year: 2011

The production of π+, π−, K+, K−, p, and p at mid-rapidity has been measured in proton-proton collisions at √ s = 900 GeV with the ALICE detector. Particle identification is performed using the specific energy loss in the inner tracking silicon detector and the time projection chamber. In addition, time-of-flight information is used to identify hadrons at higher momenta. Finally, the distinctive kink topology of the weak decay of charged kaons is used for an alternative measurement of the kaon transverse momentum (pt) spectra. Since these various particle identification tools give the best separation capabilities over different momentum ranges, the results are combined to extract spectra from pt = 100 MeV/c to 2.5 GeV/c. The measured spectra are further compared with QCD-inspired models which yield a poor description. The total yields and the mean pt are compared with previous measurements, and the trends as a function of collision energy are discussed.
Permanent Link: http://hdl.handle.net/11104/0207379