Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2008-11-28
Phys.Rev.D79:045018,2009
Physics
High Energy Physics
High Energy Physics - Lattice
14 pages
Scientific paper
10.1103/PhysRevD.79.045018
We update Monte Carlo simulations of the three-dimensional SU(3) + adjoint Higgs theory, by extrapolating carefully to the infinite volume and continuum limits, in order to estimate the contribution of the infrared modes to the pressure of hot QCD. The sum of infrared contributions beyond the known 4-loop order turns out to be a smooth function, of a reasonable magnitude and specific sign. Unfortunately, adding this function to the known 4-loop terms does not improve the match to four-dimensional lattice data, in spite of the fact that other quantities, such as correlation lengths, spatial string tension, or quark number susceptibilities, work well within the same setup. We outline possible ways to reduce the mismatch.
Hietanen Ari
Kajantie K.
Laine Mikko
Rummukainen Kari
Schroder York
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