Identified particle production in inelastic pp events with the ATLAS detector

Various strange and charm hadrons were reconstructed with the ATLAS detector in pp collisions at sqrt{s}=7 TeV. The data sample was collected in March-May of 2010 using a minimum-bias trigger. The K0_S and Lambda^0 kinematic distributions were studied using data corresponded to an integrated luminosity of 190 mub^{-1}. The Xi-+ and Omega-+ baryons were reconstructed in their cascade decays in data corresponded to an integrated luminosity of 250 mub^{-1}. The D*+-, D+- and D_s+- charm mesons were reconstructed in the range of transverse momentum p_T(D^(*))>3.5 GeV and pseudorapidity |eta(D^(*))|<2.1 in data corresponded to an integrated luminosity of 1.4 nb^{-1}. The fitted mass values were found to be in agreement with their world averages while the observed invariant mass resolutions agree with Monte Carlo expectations. This study confirms the high performance of the ATLAS detector for precision tracking measurements.