title: Bottomonium above deconfinement in lattice nonrelativistic QCD.
abstract: We study the temperature dependence of bottomonium for temperatures in the range 0.4T(c) < T < 2.1T(c), 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 ≃ 2T(c).
authors.affiliation: Department of Physics, Swansea University, Swansea SA2 8PP, United Kingdom.
authors.forename: G
authors.initials: G
authors.lastname: Aarts
authors.forename: S
authors.initials: S
authors.lastname: Kim
authors.forename: M P
authors.initials: MP
authors.lastname: Lombardo
authors.forename: M B
authors.initials: MB
authors.lastname: Oktay
authors.forename: S M
authors.initials: SM
authors.lastname: Ryan
authors.forename: D K
authors.initials: DK
authors.lastname: Sinclair
authors.forename: J-I
authors.initials: JI
authors.lastname: Skullerud