Bottomonium Production at RHIC and LHC

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dc.creatorGrandchamp, L.
dc.creatorLumpkins, S.
dc.creatorSun, D.
dc.creatorvan Hees, H.
dc.creatorRapp, R.
dc.date2005-07-27
dc.date2006-02-17
dc.date.accessioned2026-07-07T11:58:37Z
dc.date.available2026-07-07T11:58:37Z
dc.descriptionProperties of bottomonia (Upsilon, chi_b and Upsilon') in the Quark-Gluon Plasma (QGP) are investigated by assessing inelastic reaction rates and their interplay with open-bottom states (b-quarks or B-mesons) and color-screening. The latter leads to vanishing quarkonium binding energies at sufficiently high temperatures (close to the dissolution point), which, in particular, renders standard gluo-dissociation, g+Upsilon -> b + b-bar, inefficient due to a substantial reduction in final-state phase space. This problem is overcome by invoking a "quasifree" destruction mechanism, g,q,q-bar + Upsilon -> g,q,q-bar + b + b-bar, as previously introduced for charmonia. The pertinent reaction rates are implemented into a kinetic theory framework to evaluate the time evolution of bottomonia in heavy-ion reactions at RHIC and LHC within an expanding fireball model. While bottom quarks are assumed to be exclusively produced in primordial nucleon-nucleon collisions, their thermal relaxation times in the QGP, which importantly figure into Upsilon-formation rates, are estimated according to a recent Fokker-Planck treatment. Predictions for the centrality dependence of Upsilon production are given for upcoming experiments at RHIC and LHC. At both energies, Upsilon suppression turns out to be the prevalent effect.
dc.description16 Pages, 21 figures, 1 table v2: Manuscript reorganized, several sections moved to appendices, additional comments included, contents unchanged
dc.identifierhttps://arxiv.org/abs/hep-ph/0507314
dc.identifierhttp://arxiv.org/abs/hep-ph/0507314
dc.identifierPhys.Rev.C73:064906,2006
dc.identifierdoi:10.1103/PhysRevC.73.064906
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206286
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleBottomonium Production at RHIC and LHC
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