Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
1998-12-23
Nucl.Phys. B550 (1999) 449-464
Physics
High Energy Physics
High Energy Physics - Lattice
19 pages, LaTeX2e File, 9 Postscript figures
Scientific paper
10.1016/S0550-3213(99)00129-7
We analyze the finite temperature phase diagram of$QC$ with fermions in the adjoint representation. The simulations performed with four dynamical Majorana fermions show that the deconfinement and chiral phase transitions occur at two distinct temperatures. While the deconfinement transition is first order at T_d we find evidence for a continuous chiral transition at a higher temperature $T_c ~ 8 T_d. We observe a rapid change of bulk thermodynamic observables at T_d which reflects the increase in the number of degrees of freedom. However, these show little variation at T_c, where the fermion condensate vanishes. We also analyze the potential between static fundamental and adjoint charges in all three phases and extract the corresponding screening masses above T_d.
Karsch Frithjof
Lütgemeier Martin
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