G. Aarts, S. Kim, M.P.Lombardo, M.B. Oktay, S.M. Ryan, D.K. Sinclair, J.-I. Skullerud, Bottomonium above deconfinement in lattice nonrelativistic QCD, Physical Review Letters, 106, 2011, 061602-
Physical Review Letters; 106;
We study the temperature dependence of bottomonium for temperatures in the range 0.4Tc<T<2.1Tc, using nonrelativistic dynamics for the bottom quark and full relativistic lattice QCD simulations for Nf=2 light flavors on a highly anisotropic lattice. We find that the Υ is insensitive to the temperature in this range, while the χb propagators show a crossover from the exponential decay characterizing the hadronic phase to a power-law behavior consistent with nearly free dynamics at T≃2Tc
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