Global Polarization of Xi and Omega Hyperons in Au plus Au Collisions at root S-NN=200 GeV

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F21%3A00351233" target="_blank" >RIV/68407700:21340/21:00351233 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevLett.126.162301" target="_blank" >https://doi.org/10.1103/PhysRevLett.126.162301</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.126.162301" target="_blank" >10.1103/PhysRevLett.126.162301</a>

Result language
angličtina
Original language name
Global Polarization of Xi and Omega Hyperons in Au plus Au Collisions at root S-NN=200 GeV
Original language description
Global polarization of Xi and Omega hyperons has been measured for the first time in Au + Au collisions at root S-NN= 200 GeV. The measurements of the Xi(-) and (Xi) over bar (+) hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay Xi -> Lambda + pi, as well as by measuring the polarization of the daughter A hyperon, polarized via polarization transfer from its parent. The polarization, obtained by combining the results from the two methods and averaged over Xi(-) and (Xi) over bar (+), is measured to be < P-Xi > = 0.47 +/- 0.10(stat) +/- 0.23(syst)% for the collision centrality 20%-80%. The < P-Xi > is found to be slightly larger than the inclusive Lambda polarization and in reasonable agreement with a multiphase transport model. The < P-Xi > is found to follow the centrality dependence of the vorticity predicted in the model, increasing toward more peripheral collisions. The global polarization of Omega, < P-Omega > = 1.11 +/- 0.87(stat) +/- 1.97(syst)% was obtained by measuring the polarization of daughter Lambda in the decay Omega -> Lambda + K, assuming the polarization transfer factor C-Omega Lambda = 1.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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