0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Oliinychenko D.R.1,2, Sagun V.V.1, Ivanytskyi A.I.1, Bugaev K.A.1
1 Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Scs. of Ukraine
(14b, Metrolohichna Str., Kyiv 03680, Ukraine; e-mail: email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org)
2 FIAS, Goethe-University, Frankfurt
(1, Ruth-Moufang Str., Frankfurt am Main 60438, Germany)
Separate Chemical Freeze-Out of Strange Particles with Conservation Laws
Section: Fields and elementary particles
Original Author's Text: English
Abstract: The Hadron Resonance Gas Model with two freeze-outs connected by the conservation laws is considered. We are arguing that the chemical freeze-out of strange hadrons should occur earlier than the chemical freeze-out of non-strange hadrons. The hadron multiplicities measured in the heavy ion collisions for the center-of-mass energy range 2.7–200 GeV are described well by such a model. Based on a success of such an approach, a radical way to improve the Hadron Resonance Gas Model performance is suggested. Thus, we suggest to identify the hadronic reactions that freeze-out noticeably earlier or later that most of the others reactions (for different collision energies they may be different) and to consider a separate freeze-out for them.
Key words: Hadron Resonance Gas Model with the multicomponent hard-core repulsion, hadron multiplicity ratios, chemical freeze-out, Strangeness Horn, strange hadrons.