QCD level density from maximum entropy method
Presenter: Shinji Ejiri
Shinji Ejiri and Tetsuo Hatsuda
Abstract: Most of thermodynamic features of QCD can be understood by the
spectral property of energy level density. We calculate the level density function
from the data of thermodynamic quantities obtained by lattice QCD simulations. We find that the temperature dependence of thermodynamic quantities
near the phase transition point is sensitive to the structure of energy level density, and that the level density function can be determined directly by applying
the maximum entropy method. The energy level density has a close relation to
the hedoronic resonance state density widely used for the phenomenological data
analyses, and also to the Hagedorn’s bootstrap model. Possible applications of
the level density function are also discussed.
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