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- W4224258001 abstract "The polarization of inclusive J/$psi$ produced in Pb-Pb collisions at $sqrt{s_{rm NN}}=5.02$ TeV at the LHC was studied by ALICE in the dimuon channel, via the measurement of the angular distribution of its decay products. The study was performed in the rapidity region $2.5<y<4$, for three transverse momentum intervals ($2<p_{rm T}<4$, $4<p_{rm T}<6$, $6<p_{rm T}<10$ GeV/$c$) and as a function of the centrality of the collision for $2<p_{rm T}<6$ GeV/c. For the first time, the polarization was measured with respect to the event plane of the collision, by considering the angle between the positive-charge decay muon in the J/$psi$ rest frame and the axis perpendicular to the event-plane vector in the laboratory system. A small transverse polarization is measured, with a significance reaching 3.9$sigma$ at low $p_{rm T}$ and for intermediate centrality values. The polarization could be connected with the existence of a strong magnetic field in the early stage of quark-gluon plasma formation in Pb-Pb collisions, as well as with its behaviour as a rotating fluid with large vorticity." @default.
- W4224258001 created "2022-04-26" @default.
- W4224258001 creator A5076559706 @default.
- W4224258001 date "2022-04-21" @default.
- W4224258001 modified "2023-09-27" @default.
- W4224258001 title "Measurement of the J/$psi$ polarization with respect to the event plane in Pb-Pb collisions at the LHC" @default.
- W4224258001 doi "https://doi.org/10.48550/arxiv.2204.10171" @default.
- W4224258001 hasPublicationYear "2022" @default.
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