Open and Hidden CharmMesons at Finite Temperaturefrom Anisotropic Lattice QCD
2017
The quark-gluon plasma (QGP) is conjectured to have existed in the early
stages of the Big Bang and it has been discovered in heavy ion collisions. The
internal properties of the medium are not well understood. Due to its large
mass and long thermalisation time, the charm quark is an excellent tool with
which to probe the plasma. In this thesis I study the dissociation of open and
hidden charm mesons.
Lattice QCD provides a non-perturbative means of studying the spectral
quantities of charmed mesons. The suppression of J= in medium is widely
considered to be a signal for deconfinement. I will use J= to study the heavy
quark diffusion through the QGP. Jet-quenching observed in heavy ion collision
experiments may be studied through the D mesons, increasing experimental
interest in open charm. I will present the first study of the spectral functions
of these mesons.
The finite resolution in the time direction is one of the main limiting factors
in obtaining reliable spectral functions from lattice QCD. In order to reduce
the ensuing uncertainties we are currently producing a set of highly anisotropic
lattices which will greatly improve the accuracy of our results. I will outline the
method employed in the generation of these ensembles and present preliminary
results.
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