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Title Hyperon global polarization in heavy-ion collisions at energies available at the JINR Nuclotron-based Ion Collider fAcility: Feed-down effects and the role of Σ0 hyperons Author info V. Voronyuk, N. S. Tsegelnik ... [et al.] Author Voronyuk Vadym (33%)
Co-authors Tsegelnik Nikita S. (33%)
Kolomeitsev Evgeni E. 1970- (34%) UMBFP06 - Katedra fyziky
Source document Physical Review C. Vol. 111, no. 3 (2025), pp. [1-10]. - Maryland : American Physical Society, 2025 Keywords polarizácia - polarization zrážky ťažkých iónov Form. Descr. články - journal articles Language English Country United States of America Annotation Global polarization of hyperons induced by the local vorticity of the medium created in heavy-ion collisions at energies is calculated in the parton-hadron-string dynamic (phsd) model. The separation of spectator nucleons and the fluidization of the generated particle distributions are performed. The polarization of all antihyperon species is found to be significantly larger than that of hyperons. The ‾ Ξ hyperons are found to be polarized as strongly as ‾ Λ 's, but Ξ hyperons have weaker polarization compared to Λ's. The Ω and ‾ Ω polarizations show the strongest dependence on the collision energy. Despite the strong polarization of the produced Λ's and ‾ Λ 's induced by the vortical flows in the medium, the observed polarization signal is significantly depleted because of the feed-down from weak and electromagnetic decays of heavier hyperons. Particularly strong suppression is found to be due to electromagnetic decays of Σ0 hyperons, whose multiplicities obtained in the transport are poorly constrained both from the microscopic input of the Σ0 production reactions and from the experimental data. The final Λ( ‾ Λ ) polarization signal strongly depends on the Σ0 multiplicity generated in the model. With all these effects we can reproduce the measured global Λ polarization in collisions at √𝑠𝑁𝑁=7.7 and 11.5GeV and the global ‾ Λ polarization at 11.5 GeV. For energies ≲3GeV, the calculated Λ polarization is smaller than the observed one. The polarization of Ξ( ‾ Ξ ) hyperons is calculated. The signal of Ξ( ‾ Ξ ) polarization is argued to be insensitive to feed-down effects and be, therefore, a more direct probe of the degree of the vorticity in the system. URL Link na zdrojový dokument Public work category ADC No. of Archival Copy 55922 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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Title Hyperon production in Bi + Bi collisions at the nuclotron-based ion collider facility and angular dependence of hyperon spin polarization Author info Nikita S. Tsegelnik ... [et al.] Author Tsegelnik Nikita S. (33%)
Co-authors Voronyuk Vadym (33%)
Kolomeitsev Evgeni E. 1970- (34%) UMBFP06 - Katedra fyziky
Source document Particles. Vol. 7, no. 4 (2024), pp. 984-1003. - Basel : Multidisciplinary Digital Publishing Institute, 2024 Keywords zrážky ťažkých iónov hydrodynamika polarizácia - polarization Form. Descr. články - journal articles Language English Country Switzerland Annotation The strange baryon production in Bi + Bi collisions at 𝑠𝑁𝑁−−−√=9.0 GeV is studied using the PHSD transport model. Hyperon and anti-hyperon yields, transverse momentum spectra, and rapidity spectra are calculated, and their centrality dependence and the effect of rapidity and transverse momentum cuts are studied. The rapidity distributions for Λ, Ξ, Ξ baryons are found to be systematically narrower than for Λs. The 𝑝𝑇 slope parameters for anti-hyperons vary more with centrality than those for hyperons. Restricting the accepted rapidity range to |𝑦|<1 increases the slope parameters by 13–30 MeV, depending on the centrality class and the hyperon mass. Hydrodynamic velocity and vorticity fields are calculated, and the formation of two oppositely rotating vortex rings moving in opposite directions along the collision axis is found. The hyperon spin polarization induced by the medium vorticity within the thermodynamic approach is calculated, and the dependence of the polarization on the transverse momentum and rapidity cuts and on the centrality selection is analyzed. The cuts have stronger effect on the polarization of Λ and Ξ hyperons than on the corresponding anti-hyperons. The polarization signal is maximal for the centrality class, 60–70%. We show that, for the considered hyperon polarization mechanism, the structure of the vorticity field makes an imprint on the polarization signal as a function of the azimuthal angle in the transverse momentum plane, 𝜙𝐻, cos𝜙𝐻=𝑝𝑥/𝑝𝑇. For particles with positive longitudinal momentum, 𝑝𝑧>0, the polarization increases with cos𝜙𝐻, while for particles with 𝑝𝑧<0 it decreases. URL Link na plný text Public work category ADM No. of Archival Copy 55132 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Resonance production in partial chemical equilibrium Author info Sándor Lökös, Boris Tomášik Author Lökös Sándor (50%)
Co-authors Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Source document Physical Review C. Vol. 106, no. 3 (2022), pp. 1-7. - Maryland : American Physical Society, 2022 Keywords zrážky ťažkých iónov chemická rovnováha rezonancia - resonance Form. Descr. články - journal articles Language English Country United States of America URL Link na plný text Public work category ADC No. of Archival Copy 52104 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Benchmark of initial state models for heavy-ion collisions at √sNN = 27 and 62 GeV Author info Jakub Cimerman, Iurii Karpenko ... [et al.] Author Cimerman Jakub 1994- (25%)
Co-authors Karpenko Iurii (25%)
Tomášik Boris 1972- (25%) UMBFP06 - Katedra fyziky
Trzeciak Barbara Antonina (25%)
Source document Physical Review C. Vol. 103, no. 3 (2021), pp. [1-12]. - Maryland : American Physical Society, 2021 Keywords zrážky ťažkých iónov Form. Descr. články - journal articles Language English Country United States of America URL Link na zdrojový dokument Public work category ADC No. of Archival Copy 49820 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Proton number fluctuations in partial chemical equilibrium Author info Boris Tomášik, Paula Hillmann, Marcus Bleicher Author Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Co-authors Hillmann Paula (30%)
Bleicher Marcus (20%)
Source document Physical Review C. Vol. 104, no. 4 (2021), s. 1-14. - Maryland : American Physical Society, 2021 Keywords ťažké ióny zrážky ťažkých iónov Form. Descr. články - journal articles Language English Country United States of America URL Link na plný text Public work category ADC No. of Archival Copy 50996 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title The shape of the correlation function Author info Jakub Cimerman, Boris Tomášik, Christopher Plumberg Author Cimerman Jakub 1994- (33%)
Co-authors Tomášik Boris 1972- (34%) UMBFP06 - Katedra fyziky
Plumberg Christopher (33%)
Source document Physics of Particles and Nuclei. Vol. 51, no. 3 (2020), pp. 282-287. - New York : Pleiades Publishing, 2020 Keywords zrážky ťažkých iónov korelačné analýzy - correlation analysis Form. Descr. články - journal articles Language English Country United States of America URL Link na zdrojový dokument Public work category ADC No. of Archival Copy 49847 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Prospects of event shape sorting Author info Boris Tomášik, Jakub Cimerman Author Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Co-authors Cimerman Jakub 1994- (50%)
Source document Physics of Particles and Nuclei. Vol. 51, no. 3 (2020), pp. 232-237. - New York : Pleiades Publishing, 2020 Keywords zrážky ťažkých iónov engineering Form. Descr. články - journal articles Language English Country United States of America URL Link na zdrojový dokument Public work category ADC No. of Archival Copy 49850 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Event-by-event Fluctuations of the Source Shape: Implications for the Lévy Shape and Event Shape Sorting Author info Boris Tomášik, Jakub Cimerman Author Tomášik Boris 1972- (50%) UMBFP06 - Katedra fyziky
Co-authors Cimerman Jakub 1994- (50%)
Source document Acta Physica Polonica B : proceedings supplement. Vol. 12, no. 2 (2019), pp. 229-234. - Kraków : Jagiellonian University, 2019 ; Particle Correlations and Femtoscopy workshop Keywords fluktuácie zrážky ťažkých iónov chémia - chemistry ultrarelativistické jadrové zrážky korelácie Form. Descr. články - journal articles Language English Country Poland Public work category AFC No. of Archival Copy 47140 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
unrecognised
Title Averaging and the shape of the correlation function Author info Boris Tomášik, Jakub Cimerman, Christopher Plumberg Author Tomášik Boris 1972- (34%) UMBFP06 - Katedra fyziky
Co-authors Cimerman Jakub 1994- (33%)
Plumberg Christopher (33%)
Source document Universe. Vol. 5, no. 6 (2019), pp. [1-11]. - Basel : Multidisciplinary Digital Publishing Institute, 2019 Keywords chémia - chemistry zrážky ťažkých iónov ultrarelativistické jadrové zrážky výskumy korelácie Form. Descr. články - journal articles Language English Country Switzerland Annotation A brief pedagogical introduction to correlation femtoscopy is given. We then focus on the shape of the correlation function and discuss the possible reasons for its departure from the Gaussian form and better reproduction with a Levy stable distribution. With the help of Monte Carlo simulations based on asymmetric extension of the Blast-Wave model with resonances we demonstrate possible influence of averaging over many events and integrating over wide momentum bins on the shape of the correlation function. We also show that the shape is strongly influenced by the use of the one-dimensional parametrisation in the q(inv) variable. URL Link na plný text Public work category ADC No. of Archival Copy 47138 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika unrecognised
Title Fluctuating shapes of fireballs in heavy-ion collisions Author info Boris Tomášik ... [et al.] Author Tomášik Boris 1972- (40%) UMBFP06 - Katedra fyziky
Co-authors Cimerman Jakub 1994- (20%)
Kopečná Renata (20%)
Schulc Martin (20%)
Source document Baldin ISHEPP XXIV : 24. International Baldin Seminar on High Energy Physics Problems “Relativistic Nuclear Physics and Quantum Chromodynamics". Pp. [1-6]. - Les Ulis : EDP Science, 2019 ; Relativistic Nuclear Physics and Quantum Chromodynamics medzinárodná konferencia Keywords jadrová fyzika zrážky ťažkých iónov ťažké ióny ultrarelativistické jadrové zrážky kvantová chromodynamika Form. Descr. príspevky v zborníku - proceedings papers Language English Country France Public work category AFC No. of Archival Copy 47144 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ unrecognised