Response of isolated particles identified using resonances in proton-proton collisions at $sqrt{s}$=7~TeV with the ATLAS detector

A measurement of the raw calorimeter energy response for identified particles in proton-proton collisions is presented. $K_s$, $Lambda$, and $overline{Lambda}$ resonances are reconstructed by requiring opposite-sign tracks coming from a displaced vertex. The response of the pion, proton, and anti-proton decay products is then corrected for backgrounds and compared to a full detector simulation. The simulation is found to be consistent with the data for pion and proton response, but discrepancies of $sim$20% are found in the case of anti-proton response. %The response of the pion, proton, and anti-proton decay products is then measured, corrected for both neutral background from the event and, in the case of protons and anti-protons, charged background, and compared to a full detector simulation. The response is also measured for isolated two particle systems as a function of one particle's proximity to the other in the calorimeter, and the simulation's modeling of threshold effects and hadronic shower width are found to be consistent with the data.