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    TitleHyperon 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 infoV. 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
    LanguageEnglish
    CountryUnited States of America
    AnnotationGlobal 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 √𝑠𝑁⁢𝑁=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.
    URLLink na zdrojový dokument
    Public work category ADC
    No. of Archival Copy55922
    Catal.org.BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici
    Databasexpca - PUBLIKAČNÁ ČINNOSŤ
    ReferencesPERIODIKÁ-Súborný záznam periodika
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    TitleRomboid
    Subtitlečasopis slovenských spisovateľov
    Issue dataBratislava : Asociácia organizácií spisovateľov Slovenska , 1994
    Keywords literatúra - literature   lingvistika - jazykoveda - linguistics   časopisy - journals  
    Year, No.Roč. 29 č. 6-10 (1994)
    LanguageSlovak
    CountrySlovak Republic
    systematics 82:05
    Catal.org.BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici
    Databasexzrp - PERIODIKÁ - Zviazaný ročník periodika
    Copy count1, currently available 0
    References - PERIODIKÁ - Súborný záznam periodika
    ReferencesPERIODIKÁ-Súborný záznam periodika
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    219926Univerzita Mateja BelaUniversal reading roomnedostupný

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    Title100+1
    Subtitlezahraniční zajímavost
    Issue dataBrno : Extra publishing , 2023
    ISSN0322-9629
    Year, No.Č. 9 (2023)
    Periodicals statusAccepted (27.04.2023)
    LanguageCzech
    CountryCzech Republic
    Databasexjcp - PERIODIKÁ - Prijaté čísla
    Copy count1, currently available 0
    References - PERIODIKÁ - Súborný záznam periodika
    ReferencesPERIODIKÁ-Súborný záznam periodika
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    N/AUniverzita Mateja BelaUniversal reading roomnedostupný

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