Počet záznamů: 1  

Measurements of .sup.3./sup..sub.Λ./sub.H and .sup.4./sup..sub.Λ./sub.H Lifetimes and Yields in Au + Au Collisions in the High Baryon Density Region

  1. 1.
    0558720 - ÚJF 2023 RIV US eng J - Článek v odborném periodiku
    Abdallah, M. S. - Aboona, B. E. - Adam, J. - Adamczyk, L. - Bielčík, J. - Bielčíková, Jana - Federič, Pavol - Holub, P. - Chaloupka, P. - Kosarzewski, L. K. - Kramárik, L. - Líčeník, Robert - Ponimatkin, Georgij - Prozorova, V. - Robotková, Monika - Rusňák, Jan - Šimko, Miroslav - Šumbera, Michal - Truhlář, T. - Trzeciak, B. A. - Vaněk, Jan … celkem 390 autorů
    Measurements of 3ΛH and 4ΛH Lifetimes and Yields in Au + Au Collisions in the High Baryon Density Region.
    Physical Review Letters. Roč. 128, č. 20 (2022), č. článku 202301. ISSN 0031-9007. E-ISSN 1079-7114
    Grant CEP: GA MŠMT LTT18002
    Výzkumná infrastruktura: BNL-CZ II - 90109
    Institucionální podpora: RVO:61389005
    Klíčová slova: STAR experiment * heavy ion collisions
    Obor OECD: Particles and field physics
    Impakt faktor: 8.6, rok: 2022
    Způsob publikování: Omezený přístup
    https://doi.org/10.1103/PhysRevLett.128.202301

    We report precision measurements of hypernuclei H-3(Lambda) and H-4(Lambda) lifetimes obtained from Au + Au collisions at root s(NN) = 3.0 GeV and 7.2 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider, and the first measurement of H-3(Lambda) and H-4(Lambda) midrapidity yields in Au + Au collisions at root s(NN) = 3.0 GeV. H-3(Lambda) and H-4(Lambda), being the two simplest bound states composed of hyperons and nucleons, are cornerstones in the field of hypernuclear physics. Their lifetimes are measured to be 221 +/- 15(stat) +/- 19(syst) ps for H-3(Lambda) and 218 +/- 6(stat) +/- 13(syst) ps for H-4(Lambda). The p(T)-integrated yields of H-3(Lambda) and H-4(Lambda) are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of H-4(Lambda) is different for 0%-10% and 10%-50% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the H-3(Lambda) yield well, while underestimating the H-4(Lambda) yield. Transport models, combining baryonic mean-field and coalescence (JAM) or utilizing dynamical cluster formation via baryonic interactions (PHQMD) for light nuclei and hypernuclei production, approximately describe the measured H-3(Lambda) and H-4(Lambda) yields. Our measurements provide means to precisely assess our understanding of the fundamental baryonic interactions with strange quarks, which can impact our understanding of more complicated systems involving hyperons, such as the interior of neutron stars or exotic hypernuclei.
    Trvalý link: http://hdl.handle.net/11104/0332290

     
     
Počet záznamů: 1  

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