Hyperon production in Ar_s16KCl collisions at 1.76A GeV
Keywords
heavy ion: scattering, argon, potassium: chlorine, hyperon: hadroproduction, hyperon: yield, yield: (Xi- Sigma Lambda), rapidity spectrum, conservation law: strangeness, hadronization: model, model: statistical, freeze-out: temperature, magnetic spectrometer, experimental results, Darmstadt SIS, 1.76 GeV/nucleon
Abstract
We present transverse momentum spectra, rapidity distribution and multiplicity of Lambda-hyperons measured with the HADES spectrometer in the reaction Ar(1.76A GeV)_s16KCl. The yield of Xi- is calculated from our previously reported Xi-/(Lambda_s16Sigma0) ratio and compared to other strange particle multiplicities. Employing a strangeness balance equation the multiplicities of the yet unmeasured charged Sigma hyperons can be estimated. Finally a statistical hadronization model is used to fit the yields of pi-, K_s16, K0s, K-, phi, Lambda and Xi-. The resulting chemical freeze-out temperature of T=(76_s16-2) MeV is compared to the measured slope parameters obtained from fits to the transverse mass distributions of the particles.
