27 September 2015 to 3 October 2015
Kobe, Fashion Mart, Japan
Japan timezone

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

29 Sept 2015, 15:20
20m
Exhibition Space 2-B

Exhibition Space 2-B

Contributed talk QGP in Small Systems QGP in Small Systems II

Speaker

Livio Bianchi (University of Houston (US))

Description

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 $K_{\rm S}^{0},~\Lambda,~\bar\Lambda$, $\Xi^{-}$, $\bar\Xi^{+}$, $\Omega^{-}$ and $\bar\Omega^{+}$ 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 ($\Lambda/K_{\rm S}^{0}$) as a function of $p_{\rm T}$ 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.
On behalf of collaboration: ALICE

Primary author

Livio Bianchi (University of Houston (US))

Presentation materials