Strangeness production in high multiplicity pp collisions
January 16, 2018
January 22, 2018
Over the last three decades, proton-proton (pp) collisions have successfully provided a reference sample for the study of nucleus-nucleus collisions and have helped to unveil features attributed there to the formation of Quark Gluon Plasma. The results from the LHC pp program revealed some intriguing features in pp collisions that resemble those of nucleus-nucleus collisions and therefore bring into question the reference sample paradigm at the TeV scale. One of the measured effects is strangeness enhancement as function of multiplicity, where similar production rates of (multi-)strange particles are observed in high multiplicity pp collisions as in peripheral Pb-Pb collisions. A review of the multiplicity dependence of strange and multi-strange particle production in pp collisions at 7 and 13 TeV measured by the ALICE experiment is reported.
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