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Ab Initio Calculation of Finite Temperature Charmonium Potentials
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The interquark potential in charmonium states is calculated for the first time in both the zero and non-zero temperature phases from a first-principles lattice QCD calculation. Simulations with two dynamical quark flavours were used with temperatures T in the range 0.4 T_c \lesssim T \lesssim 1.7 T_c, where T_c is the deconfining temperature. The correlators of point-split operators were analysed to gain spatial information about the charmonium states. A method, introduced by the HAL QCD collaboration and based on the Schroedinger equation, was applied to obtain the interquark potential. We find a clear temperature dependence, with the central potential becoming flatter (more screened) as the temperature increases.
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Thermal lattice QCD results from the FASTSUM collaboration
FASTSUM's thermal lattice QCD results show thermal modifications of open charm meson masses, partial parity doubling of charm baryons, and a temperature-dependent interquark potential in bottomonium.
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