k_S^0, Λ, and ͞Λ, pT spectra in pp collisions at √s = 7 TeV, measured with the ALICE experiment at LHC

Abstract: This thesis presents a study of L, ¯L, and K0 s particle (generically referred to as V0 particles) production measured by the ALICE experiment located at LHC, CERN, in protonproton collisions at a center of mass collision energy of p s = 7 TeV. The particles are reconstructed via their V0 decay topology, which can be done due to the excellent tracking performance of the Time Projection Chamber detector. The V0 invariant yields, as well as the pT dependence of the L/K0 s and ¯L/L ratios, are produced and analyzed. In addition to being one of the first measurements of these particles in pp collisions at this energy, the results are important as a reference for studies of lead-lead collisions, where the yield and ratio dependencies of transverse momentum are expected to change due to a recombination mechanism during the hadronization of the new quark matter state created in heavy ion collisions: the quark gluon plasma.