We present transverse momentum spectra, rapidity distribution and multiplicity of Λ-hyperons measured with the HADES spectrometer in the reaction Ar(1.76A GeV) + KCl. The yield of Ξ is calcu-lated from our previously reported Ξ /(Λ+Σ0) ratio and compared to other strange particle multiplicities. Employing a strangeness balance equation the multiplicities of the yet unmeasured Σ±-hyperons can be estimated. Finally a statistical hadronization model is used to fit the yields of π, K+, K0s, K, φ, Λ and Ξ. The resulting chemical freeze-out temperature of T = (76 ± 2) MeV is compared to the measured slope parameters obtained from fits to the transverse mass distributions of the different particles.

Original languageEnglish
Article number21
JournalEuropean Physical Journal A
Issue number2
StatePublished - Feb 2011
Externally publishedYes


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