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Quarkonium spin alignment in a vortical medium

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Autor(es):
De Moura, Paulo Henrique ; Goncalves, Kayman J. ; Torrieri, Giorgio
Número total de Autores: 3
Tipo de documento: Artigo Científico
Fonte: PHYSICAL REVIEW D; v. 108, n. 3, p. 17-pg., 2023-08-30.
Resumo

We use a potential model to investigate the phenomenology of quarkonium in a thermal rotating medium, where vorticity and spin density are not necessarily in equilibrium. We find that the quarkonium spin density matrix, as well as the binding energy and melting temperature, are sensitive to both the vorticity and the lack of equilibrium between vorticity and spin. This means that quarkonium spin alignment is a sensitive probe for vorticity and spin within the hydrodynamic phase. Information unequivocally pointing to spin-orbit nonequilibrium dynamics can be obtained from a combined study of quarkonium relative abundance and spin alignment, as well as experimentally obtainable off-diagonal density matrix elements. (AU)

Processo FAPESP: 21/01700-2 - Uma teoria de campo eficaz de equilíbrio relativístico local
Beneficiário:Donato Giorgio Torrieri
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 17/05685-2 - Física hadrônica em colisões nucleares de altas energias
Beneficiário:Jun Takahashi
Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais