Survival of charmonia above Tc in anisotropic lattice QCD

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dc.creatorIida, H.
dc.creatorDoi, T.
dc.creatorIshii, N.
dc.creatorSuganuma, H.
dc.creatorTsumura, K.
dc.date2008-06-01
dc.date.accessioned2026-07-07T12:28:38Z
dc.date.available2026-07-07T12:28:38Z
dc.descriptionWe find a strong evidence for the survival of $J/Ψ$ and $η_c$ as spatially-localized $c\bar c$ (quasi-)bound states above the QCD critical temperature $T_c$, by investigating the boundary-condition dependence of their energies and spectral functions. In a finite-volume box, there arises a boundary-condition dependence for spatially spread states, while no such dependence appears for spatially compact states. In lattice QCD, we find almost {\it no} spatial boundary-condition dependence for the energy of the $c\bar c$ system in $J/Ψ$ and $η_c$ channels for $T\simeq(1.11-2.07)T_c$. We also investigate the spectral function of charmonia above $T_c$ in lattice QCD using the maximum entropy method (MEM) in terms of the boundary-condition dependence. There is {\it no} spatial boundary-condition dependence for the low-lying peaks corresponding to $J/Ψ$ and $η_c$ around 3GeV at $1.62T_c$. These facts indicate the survival of $J/Ψ$ and $η_c$ as compact $c\bar c$ (quasi-)bound states for $T_c < T < 2T_c$.
dc.description4 pages, 1 figure
dc.identifierhttps://arxiv.org/abs/0806.0126
dc.identifierhttp://arxiv.org/abs/0806.0126
dc.identifierProg.Theor.Phys.Suppl.174:238-241,2008
dc.identifierdoi:10.1143/PTPS.174.238
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215605
dc.subjectHigh Energy Physics - Lattice
dc.titleSurvival of charmonia above Tc in anisotropic lattice QCD
dc.typetext

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