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arXiv · 1604.06736

Strangeness production as a function of charged particle multiplicity in proton-proton collisions

Livio Bianchi
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Abstract

Recent measurements performed in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have shown features that are reminiscent of those observed in lead-lead (Pb-Pb) collisions. These observations warrant a comprehensive measurement of the production of identified particles. We report on the production of \allparts at mid-rapidity measured as a function of multiplicity in pp collisions at $\sqrt{s}$ = 7 TeV with the ALICE experiment. Spectral shapes studied both for individual particles and via particle ratios such as ($Λ/K^{0}_{S}$) as a function of $p_{T}$ exhibit an evolution with event multiplicity and the production rates of hyperons are observed to increase more strongly than those of non-strange hadrons. These phenomena are qualitatively similar to the ones observed in p-Pb and Pb-Pb collisions.

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Livio Bianchi. 2016-04-26. Strangeness production as a function of charged particle multiplicity in proton-proton collisions. https://doi.org/10.1016/j.nuclphysa.2016.03.005

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