Speaker
Description
In order to study the hot hadronic matter created in heavy ion collisions it is important to compare particle production in such collisions with particle production in other, smaller systems, such as proton-proton (pp) and proton-lead (p--Pb) collisions. In particular, hyperon resonances with different lifetimes are good candidates to probe the interplay of particle re-scattering and regeneration in the hadronic phase. The yields of the strange and double-strange hyperon resonances $\Sigma(1385)^{\pm}$ and $\Xi(1530)^{0}$ are measured in the rapidity range $-0.5 < y < 0$ in p--Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV with the ALICE detector at the LHC. We report on the transverse momentum distributions and mean transverse momentum as a function of the charged-particle multiplicity. These results complement the information deriving from the measurements of other resonances such as K*(892)$^{0}$ and $\Phi$(1020). The multiplicity dependence of the integrated yield ratios of excited hyperons to longer-lived particles is discussed and compared to model predictions from pQCD-inspired models such as PYTHIA8 as well as statistical hadronization models.
