Production of $\Sigma(1385)^{\pm}$ and $\Xi(1530)^0$ in p--Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV

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5.02 TeV
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The transverse momentum distributions of the strange and double-strange hyperon resonances ($\Sigma(1385)^{\pm}$, $\Xi(1530)^{0}$) produced in p--Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV were measured in the rapidity range $-0.5< y_\mathrm{CMS}<0$ for event classes corresponding to different charged-particle multiplicity densities, $\langle$d$N_{\mathrm{ch}}/$d$\eta_{\mathrm{lab}}\rangle$. The mean transverse momentum values are presented as a function of $\langle$d$N_{\mathrm{ch}}/$d$\eta_{\mathrm{lab}}\rangle$, as well as a function of the particle masses and compared with previous results on hyperon production. The integrated yield ratios of excited to ground-state hyperons are constant as a function of $\langle$d$N_{\mathrm{ch}}/$d$\eta_{\mathrm{lab}}\rangle$. The equivalent ratios to pions exhibit an increase with $\langle$d$N_{\mathrm{ch}}/$d$\eta_{\mathrm{lab}}\rangle$, depending on their strangeness content.