Hyperon production in Ar plus KCl collisions at 1.76A GeV

0366259 - ÚJF 2012 RIV DE eng J - Journal Article
Agakishiev, G. - Balanda, A. - Bannier, B. - Belver, D. - Křížek, Filip - Kugler, Andrej - Sobolev, Yuri, G. - Tlustý, Pavel - Wagner, Vladimír … Total 113 authors
Hyperon production in Ar plus KCl collisions at 1.76A GeV.
European Physical Journal A. Roč. 47, č. 2 (2011), 21/1-21/8. ISSN 1434-6001. E-ISSN 1434-601X
R&D Projects: GA AV ČR IAA100480803; GA MŠMT LC07050
Institutional research plan: CEZ:AV0Z10480505
Keywords : HEAVY-ION COLLISIONS * NUCLEUS-NUCLEUS COLLISIONS * KAON PRODUCTION
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
Impact factor: 2.190, year: 2011

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+Sigma(0)) ratio and compared to other strange particle multiplicities. Employing a strangeness balance equation the multiplicities of the yet unmeasured Sigma(+/-)-hyperons can be estimated. Finally a statistical hadronization model is used to fit the yields of pi(-), K(+), K(s)(0), 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 different particles.
Permanent Link: http://hdl.handle.net/11104/0201312