Szczegóły publikacji
Opis bibliograficzny
Measurement of the $J/\psi$ polarization with respect to the event plane in Pb-Pb collisions at the LHC / S. Acharya, [et al.], B. BALIŚ, [et al.], M. GORGOŃ, [et al.], A. HORZYK, [et al.], M. JABŁOŃSKI, [et al.], J. P KITOWSKI, [et al.], S. D. KORYCIAK, [et al.], P. G. RUSSEK, [et al.] // Physical Review Letters ; ISSN 0031-9007. — 2023 — vol. 131 iss. 4, s. 042303-1–042303-13. — Bibliogr. s. 042303-6–042303-7, Abstr. — Publikacja dostępna online od: 2023-7-25
Autorzy (1031)
Dane bibliometryczne
| ID BaDAP | 148335 |
|---|---|
| Data dodania do BaDAP | 2023-09-28 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevLett.131.042303 |
| Rok publikacji | 2023 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Physical Review Letters |
Abstract
We study the polarization of inclusive J/ψ produced in Pb-Pb collisions at √sNN=5.02 TeV at the LHC in the dimuon channel, via the measurement of the angular distribution of its decay products. We perform the study in the rapidity region 2.5<y<4, for three transverse momentum intervals (2<pT<4, 4<pT<6, 6<pT<10 GeV/c) and as a function of the centrality of the collision for 2<pT<6 GeV/c. For the first time, the polarization is measured with respect to the event plane of the collision, by considering the angle between the positive-charge decay muon in the J/ψ 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 3.9σ at low pT and for intermediate centrality values. The polarization could be connected with the behavior of the quark-gluon plasma, formed in Pb-Pb collisions, as a rotating fluid with large vorticity, as well as with the existence of a strong magnetic field in the early stage of its formation.