Students search for strange particles, produced from collisions at LHC and recorded by the ALICE experiment.
Students study quark-gluon plasma (QGP) by observing the strangeness enhancement which they determine by counting the number of strange particles, that is particles containing at least one strange quark, and calculating the ratio of strange to non-strange particles. If this ratio is higher than that given by the theoretical models that do not foresee the creation of QGP, then enhancement has been observed. Alternatively, for lead ion collisions, the number of strange particles is normalized to the number of nucleons participating in the interaction and compared with the same ratio for proton collisions. Image Credit: CERN, ALICE