Dissociation of Heavy Quarkonia in the Quark-Gluon Plasma

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dc.creatorWong, Cheuk-Yin
dc.date2001-12-21
dc.date2002-05-27
dc.date.accessioned2026-07-07T10:54:44Z
dc.date.available2026-07-07T10:54:44Z
dc.descriptionUsing a temperature-dependent potential obtained from lattice gauge calculations, we study the stability of heavy quarkonia in the quark-gluon plasma. We find that only the Upsilon(1S) and the eta_b(1S) are bound in the quark-gluon plasma, and have a small binding energy. The quark-gluon plasma may be revealed by an Upsilon(1S) dilepton peak with an invariant mass close to twice the current b quark mass, which is lower than the Upsilon(1S) mass in free space. The quarkonia Upsilon(1S) and eta_b(1S) can dissociate by collision with quarks and gluons in the quark-gluon plasma. We evaluate the dissociation cross section of the Upsilon(1S) due to gluon absorption. The Upsilon(1S) and the eta_b(1S) can also dissociate spontaneously at temperatures above the dissociation temperature 1.11T_c, where T_c is the quark-gluon plasma phase transition temperature. At temperatures slightly above the dissociation temperature these states appear as resonances, which provides another signature for the quark-gluon plasma.
dc.description19 pages, in LaTex, add an appendix and a figure
dc.identifierhttps://arxiv.org/abs/nucl-th/0112064
dc.identifierhttp://arxiv.org/abs/nucl-th/0112064
dc.identifierJ.Phys.G28:2349-2364,2002
dc.identifierdoi:10.1088/0954-3899/28/9/302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/185889
dc.subjectNuclear Theory
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDissociation of Heavy Quarkonia in the Quark-Gluon Plasma
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