Abstract
The production of Ξ− and Ω− baryons and their anti-particles in Pb-Pb and pp collisions at = 2.76 TeV has been measured by the ALICE collaboration. The transverse momentum spectra at mid-rapidity (|y| < 0.5) in pp and in Pb-Pb collisions for five centrality intervals have been compared with model predictions. Hyperon yields and spectra in Pb-Pb collisions, normalized to the corresponding measurements in pp at the same centre-of-mass energy, allow the study of the strangeness enhancement and the nuclear modification factor as a function of the transverse momentum (pT) and collision centrality.
Highlights
The transverse momentum spectra at mid-rapidity (|y| < 0.5) in pp and in Pb–Pb collisions for five centrality intervals have been compared with model predictions
The study of strange and multi-strange particle production in relativistic heavy-ion (A–A) interactions is an important tool to investigate the properties of the strongly interacting system created in the collision, as there is no net strangeness content in the colliding nuclei
Transverse momentum spectra, corrected for acceptance and efficiency, in pp and Pb–Pb collisions are shown in Figure 1 and 2 respectively
Summary
The study of strange and multi-strange particle production in relativistic heavy-ion (A–A) interactions is an important tool to investigate the properties of the strongly interacting system created in the collision, as there is no net strangeness content in the colliding nuclei. √The production of Ξ− and Ω− baryons and their anti-particles in Pb–Pb and pp collisions at sNN = 2.76 TeV has been measured by the ALICE collaboration.
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