Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2002-03-13
Phys.Lett. B535 (2002) 358-362
Physics
High Energy Physics
High Energy Physics - Lattice
Concluding statement reworded. To appear in Physics Letters B
Scientific paper
10.1016/S0370-2693(02)01757-4
We compute the topological susceptibility chi_t in SU(3) lattice gauge theory using fermionic methods based on the Atiyah-Singer index theorem. Near the phase transition we find a smooth crossover behavior for chi_t with values decreasing from (191(5) MeV)^4 to (100(5) MeV)^4 as we increase the temperature from 0.88 T_c to 1.31 T_c, showing that topological excitations exist far above T_c. Our study is the first large scale analysis of the topological susceptibility at high temperature based on the index theorem and the results agree well with field theoretical methods.
Gattringer Christof
Hoffmann Roland
Schaefer Stefan
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