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 |
|---|
Author
Livio Bianchi
(University of Houston (US))
