NA61/SHINE shining more light on the onset of deconfinement

Lewicki, Maciej P.; Turko, Ludwik

doi:10.48550/arxiv.2002.00631

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…Status of experimental results on energy dependence of the K + /π + ratio at midrapidity in high-energy nuclear collisions. In addition to the previously shown results on central heavy-ion collisions [16][17][18][19][20][21][22][23][24][25][26] and inelastic p+p [19,[27][28][29][30][31] interactions, results on central Be+Be [46], C+C [47,48], Si+Al [49], Si+Si [47,48], Ar+Sc (preliminary) [50,51], Ni+Ni [52,53] and Xe+Xe [54] (right) as a function of a mean number of wounded nucleons, W , in inelastic p+p interactions [27] and central Be+Be [46], C+C [47], Si+Si [47], Ar+Sc (preliminary) [50,51], Au+Au [22], Pb+Pb [16,17] collisions. Experimental results were compared with the PHSD [12,13] (open crosses) and SMASH [14,15] (open circles) predictions.…”

Section: Collisions Of Intermediate-mass Nucleimentioning

confidence: 79%

“…Status of experimental results on energy dependence of the K + /π + ratio at midrapidity in high-energy nuclear collisions. In addition to the previously shown results on central heavy-ion collisions[16][17][18][19][20][21][22][23][24][25][26] and inelastic p+p[19,[27][28][29][30][31] interactions, results on central Be+Be[46], C+C[47,48], Si+Al[49], Si+Si[47,48], Ar+Sc (preliminary)[50,51], Ni+Ni[52,53] and Xe+Xe[54] collisions are shown. Points presenting Pb+Pb/Au+Au and p+p are plotted in pale colours to emphasize intermediate-mass nuclei results.…”

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confidence: 79%

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Diagram of High-Energy Nuclear Collisions

2023

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Many new particles, mostly hadrons, are produced in high-energy collisions between atomic nuclei. The most popular models describing the hadron-production process are based on the creation, evolution and decay of resonances, strings or quark–gluon plasma. The validity of these models is under vivid discussion, and it seems that a common framework for this discussion is missing. Here, for the first time, we explicitly introduce the diagram of high-energy nuclear collisions, where domains of the dominance of different hadron-production processes in the space of laboratory-controlled parameters, the collision energy and nuclear-mass number of colliding nuclei are indicated. We argue that the recent experimental results suggest the location of boundaries between the domains, allowing for the first time to sketch an example diagram. Finally, we discuss the immediate implications for experimental measurements and model development following the proposed sketch of the diagram.

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Section: Collisions Of Intermediate-mass Nucleimentioning

confidence: 79%

“…Status of experimental results on energy dependence of the K + /π + ratio at midrapidity in high-energy nuclear collisions. In addition to the previously shown results on central heavy-ion collisions[16][17][18][19][20][21][22][23][24][25][26] and inelastic p+p[19,[27][28][29][30][31] interactions, results on central Be+Be[46], C+C[47,48], Si+Al[49], Si+Si[47,48], Ar+Sc (preliminary)[50,51], Ni+Ni[52,53] and Xe+Xe[54] collisions are shown. Points presenting Pb+Pb/Au+Au and p+p are plotted in pale colours to emphasize intermediate-mass nuclei results.…”

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confidence: 79%

Diagram of High-Energy Nuclear Collisions

2023

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“…The application of lQCD to the study of such a matter is limited due to the so-called sign problem. However, there are current and future accelerator facilities, such as RHIC [14], Super Proton Synchrotron (SPS) [15,16], Nuclotron-based Ion Collider (NICA) [17], and the Facility for Anti-proton Ion Research (FAIR) [18,19], which have carried out or plan to conduct diverse experimental programs to explore this part of the QCD phase diagram. The sequence of events in relativistic heavy ion collisions involving the generation of hot and dense matter can be outlined as follows: a pre-equilibrium phase, the attainment of thermal (or chemical) equilibrium among partons, the potential formation of Quark-Gluon Plasma (QGP) or a mixed state of QGP and hadron gas, the emergence of a gas comprising hot interacting hadrons, and, ultimately, a freezeout state where the produced hadrons cease strong interactions.…”

Section: Introductionmentioning

confidence: 99%

Centrality and System Size Dependence among Freezeout Parameters and the Implications for EOS and QGP in High-Energy Collisions

Waqas,

Haj Ismail,

Alrebdi

et al. 2023

Entropy

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Utilizing the Modified Hagedorn function with embedded flow, we analyze the transverse momenta (pT) and transverse mass (mT) spectra of π+ in Au–Au, Cu–Cu, and d–Au collisions at sNN = 200 GeV across various centrality bins. Our study reveals the centrality and system size dependence of key freezeout parameters, including kinetic freezeout temperature (T0), transverse flow velocity (βT), entropy-related parameter (n), and kinetic freezeout volume (V). Specifically, T0 and n increase from central to peripheral collisions, while βT and V show the opposite trend. These parameters also exhibit system size dependence; T0 and βT are smaller in larger collision systems, whereas V is larger. Importantly, central collisions correspond to a stiffer Equation of State (EOS), characterized by larger βT and smaller T0, while peripheral collisions indicate a softer EOS. These insights are crucial for understanding the properties of Quark–Gluon Plasma (QGP) and offer valuable constraints for Quantum Chromodynamics (QCD) models at high temperatures and densities.

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“…This is a consequence of the fact that after the deconfinement transition occurs in the system, the strangeness yield becomes independent of the collision energy [7][8][9][10]. Recent investigations showed that the K + /π + peak strongly depends on the volume of the system and tends to be less pronounced in small-sized systems [7,11].…”

Section: Introductionmentioning

confidence: 99%

Diquarks and Λ0/π+, Ξ−/π+ Ratios in the Framework of the EPNJL Model

Friesen,

Kalinovsky

2023

Particles

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The applicability of the effective models to the description of baryons and the behaviour of ratios of strange baryons to pions is discussed. In the framework of the EPNJL model, the Bethe–Salpeter equation is used to find masses of baryons, which are considered to be in a diquark-quark state. Baryon melting is discussed at a finite chemical potential, and a flavor dependence of the hadronic deconfinement temperature is pointed out. It is shown that the description of the diquark-quark state at finite chemical potential is limited due to the occurrence of Bose condensate. This effect is strongly manifested in the description of light diquarks and baryons. Both the Λ0/π+ and Ξ−/π+ ratios show a sharp behaviour as functions of the T/μB variable, where T and μB are calculated along the melting lines.

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NA61/SHINE shining more light on the onset of deconfinement

Cited by 3 publications

References 10 publications

Diagram of High-Energy Nuclear Collisions

Diagram of High-Energy Nuclear Collisions

Centrality and System Size Dependence among Freezeout Parameters and the Implications for EOS and QGP in High-Energy Collisions

Diquarks and Λ0/π+, Ξ−/π+ Ratios in the Framework of the EPNJL Model

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