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Hadronic resonances play an important role in the study of the physics of heavy-ion collisions. In these proceedings, we discuss how the resonances can probe the reaction dynamics, the strangeness production and the properties of the hadronic phase in heavy-ion collisions at center-of-mass energies of sNN = 4–11 GeV. The resonance properties predicted by the general-purpose event generators are found to be very sensitive to the properties and space-time evolution of the medium produced in heavy-ion collisions.

This is a brief review of our work describing the hadronization process of a QGP fireball formed in relativistic heavy-ion collisions. We introduce the SHARE method of analysis of hadron multiplicities. Using this tool we describe in consistent continuos manner the yield of all hadrons produced in the available range of reaction energies and centralities. The properties of the fireball final state can be understood by considering all primary hadronic particles. The dense hadron fireball created at SPS, RHIC, and LHC shows that the final state is differentiated solely by: i) volume changes; and ii) flavor (strangeness, charm) content. Conversely, emerging particles add up to create universal hadronization pressure $P = 80 \pm 3$ MeV/fm$^3$ for all considered collision systems. The relative strangeness to entropy content of a large fireball is found to be that of quark-gluon plasma degrees of freedom near the chemical QGP equilibrium. This 'Universal Hadronization' condition common to SPS, RHIC, and LHC agrees with the proposed reaction picture of a direct QGP fireball evaporation into free-streaming hadrons., 11 pages, many figures; Presented in Wroclaw at the February 2014 MB32-Symposium honoring Ludwik Turko

The study of strangeness production is among the main tasks in the physics program of the MPD experiment at the NICA accelerator complex. In this paper, the results of the detector performance study for the measurements of the energy dependence of the yields of charged kaons and pions as well as the strangeness-to-entropy ratio are reported.

We review the predicted properties of short-lived resonances produced in heavy-ion collisions at NICA energies and discuss their sensitivity to strangeness production, the hadronization mechanisms, rescattering and regeneration effects in the hadronic phase of nucleus-nucleus collisions. Results of feasibility studies for the reconstruction of resonances in the MPD experimental setup are also presented and discussed.

One of the main tasks of the NICA/MPD physics program is the study of strangeness production in nuclear collisions. In this paper, results of the Monte Carlo investigation of the MPD detector performance for reconstruction of light hypernuclei in central Au + Au collisions are presented.

Strangeness production in heavy-ion collisions is one of the main goals of the scientific program at the NICA accelerator complex. The MPD detector is designed to study the properties of strongly interacting matter at extreme baryon densities. In this article, the MPD performance to measure the excitation function of the strangeness to entropy ratio in central Au + Au collisions is reported. The investigation has been performed at the Laboratory of High Energy Physics, JINR.

The future heavy-ion NICA collider (JINR, Dubna) will provide a variety of beam types with the range of collision energies from 4 to 11A GeV. New experimental data on event-by-event fluctuations and strangeness production allow addressing important QCD properties such as nature of deconfinement phase transition and the existence of the Critical End Point (CEP). Heavy-ion collisions at NICA will be measured with the multi-purpose detector—MPD, which provides precise reconstruction of multiple physics channels. NICA physics goals and the MPD concept are described with the emphasis on the detector performance in the study of the excitation function for high order moments of net-proton event-by-event multiplicity distributions. The results of a feasibility study for measuring at NICA spectra and yields of kaons and pions, and the strangeness-to-entropy ratio are presented as well.

Heavy-ion collisions provide information about the properties of the matter under extreme conditions. Measurement of strangeness production properties provides important information about the collision region evolution. The spatial and temporal characteristics of particle emission can be extracted using femtoscopy technique. The collision energy, centrality, and transverse mass dependence of the three-dimensional charged kaon femtoscopic radii for Au + Au collisions in the Beam Energy Scan program is presented.

NICA is a new flagship project in Dubna aimed at constructing a new accelerator complex for heavy ions. The main goal of the project is experimental exploration of the still poorly known region of the nuclear matter phase diagram of the highest net-baryon density. The MPD detector is a multi-purpose large acceptance spectrometer for studying heavy-ion collisions. An overview is presented of the NICA physics program for studying strangeness production and present MPD performance for reconstructing hyperons and hypernuclei.

One of the main tasks of the NICA/MPD physics program is a study of strangeness production in nuclear collisions. In this paper the MPD detector performance for measurements of multistrange hyperons in Au + Au collisions at NICA energies is presented based on the analysis of realistically simulated data samples. Perspectives of the studies on the strangeness production at the experiment start-up are evaluated.

Beam-recoil transferred polarizations for the exclusive electroproduction of $K^+\Lambda$ and $K^+\Sigma^0$ final states from an unpolarized proton target have been measured using the CLAS12 spectrometer at Jefferson Laboratory. The measurements at beam energies of 6.535~GeV and 7.546~GeV span the range of four-momentum transfer $Q^2$ from 0.3 to 4.5~GeV$^2$ and invariant energy $W$ from 1.6 to 2.4~GeV, while covering the full center-of-mass angular range of the $K^+$. These new data extend the existing hyperon polarization data from CLAS in a similar kinematic range but from a significantly larger dataset. They represent an important addition to the world data, allowing for better exploration of the reaction mechanism in strangeness production processes, for further understanding of the spectrum and structure of excited nucleon states, and for improved insight into the strong interaction in the regime of non-perturbative dynamics., Comment: 25 pages, 22 figures, 4 tables

Two-particle correlations in ∆η and ∆φ are used to study jets, in particular, their particle com- position. While in Pb-Pb collisions this is done to characterize the quark-gluon Plasma, pp and p-Pb collisions serve as a reference and are of interest on their own for their input into the under- standing of particle production mechanisms. Recent ALICE results on the production of strange particles in small systems (pp and p-Pb collisions) reveal the possibility of having similar strange hadron production mechanisms in all collision systems. We study the production mechanism of hidden strangeness ($\phi$ meson) and open strangeness ( $K_S^0$ meson) in jets via two-particle correlations between the strange hadrons and charged primary hadrons in pp collisions at $\sqrt{s}$ = 13 TeV and p-Pb at $\sqrt{s_{NN}}$ = 5.02 TeV collected with the ALICE experiment at the LHC. In this paper, the dependence of the per-trigger yields of strange hadrons on the transverse mo- menta of the trigger and associated particles, as well as on the event multiplicity, is presented on both the near-side and away-side of the h-$K_S^0$, $K_S^0$-h and h-$\phi$ correlation functions. Moreover, the ratios of these yields to the yields extracted from the h-h correlation function are shown. In addition, a comparison to different MC generators is presented.

In this paper we analyze in detail the production of strangeness in proton-proton collisions in the kinematics of large transverse momenta $p_{T}$ of produced hadrons. Using the color dipole framework, we estimated the production cross-sections for kaons, and demonstrated that the shapes of the $p_{T}$-dependence are in agreement with available experimental data. We also analyzed the self-normalized yields of strange hadrons as a function of multiplicity of co-produced hadrons, and found that the predictions are in agreement with the faster-than-linear growth seen in experimental data. Our description is largely parameter-free and complements our previous studies dedicated to the explanation of multiplicity enhancement of quarkonia, as well as $D$- and $B$-mesons., Comment: 12 pages, 6 figures. This paper is a sequel to our earlier publications arXiv:1910.13579, arXiv:2003.13768, arXiv:2008.12446 and arXiv:2012.08284 dedicated to multiplicity dependence of high energy production cross-sections

We investigate $S=-2$ production from the $\Lambda p\to K^+X$ reactions within the effective Lagrangian approach. The $\Lambda p\to K^+\Lambda\Lambda$ and $\Lambda p\to K^+\Xi^-p$ reactions are considered to find the lightest $S=-2$ system, which is $H$-dibaryon. We assume that the $H(2250)\to\Lambda\Lambda$, and $H(2270)\to\Xi^-p$ decays with the intrinsic decay width of 1 MeV. According to our calculations, the total cross-sections for $\Lambda p\to K^+\Lambda\Lambda$ and $\Lambda p\to K^+\Xi^-p$ reactions were found to be of the order of a few $\mu$b in the $\Lambda$ beam momentum range of up to 5 GeV$/c$. Furthermore, the direct access of information regarding the interference patterns between the $H$-dibaryon and non-resonant contributions was demonstrated.