0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Bogolyubov Institute for Theoretical Physics, Nat. Acad. of Sci. of Ukraine
(14-b, Metrolohichna Str., Kyiv, 03680, Ukraine; e-mail: email@example.com)
Λ-Anomaly in the Hadronic Chemical Freeze-out
Section: Fields and elementary particles
Original Author's Text: Ukrainian
Abstract: A new way to overcome the Λ hyperon selective suppression, which is known as the Λ-anomaly, has been suggested. In particular, the additional radius of a Λ hyperon is introduced into the model of hadron resonance gas with the multicomponent hard-core repulsion. The proposed approach allows one to describe the hadron multiplicity ratios measured at the AGS, SPS, and RHIC energies with the accuracy χ2/dof = 52/55 ≃ 0.95.
Key words: hadron multiplicities, hard-core repulsion, chemical freeze-out, strangeness suppression.