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Hyperon production in Ar+KCl collisions at 1.76A GeV

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arxiv 1010.1675 v3 pith:HB3BIDBN submitted 2010-10-08 nucl-ex hep-ex

Hyperon production in Ar+KCl collisions at 1.76A GeV

classification nucl-ex hep-ex
keywords comparedlambdameasuredmultiplicitiestransversebalancecalculatedcharged
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present transverse momentum spectra, rapidity distribution and multiplicity of Lambda-hyperons measured with the HADES spectrometer in the reaction Ar(1.76A GeV)+KCl. The yield of Xi- is calculated from our previously reported Xi-/(Lambda+Sigma0) 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+, K0s, K-, phi, Lambda and Xi-. 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 particles.

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  1. Production of {\Lambda} hyperons in 4.0A GeV and 4.5A GeV carbon-nucleus interactions at the Nuclotron

    hep-ex 2026-04 unverdicted novelty 4.0

    New measurements of Lambda hyperon yields in 4.0A-4.5A GeV carbon-nucleus collisions at the Nuclotron are presented and compared with transport model predictions.