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

This is the authors' abstract. We don't add key points for this paper.

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