Fermions obstruct dimensional reduction in hot QCD

Details Fermions obstruct dimensional reduction in hot QCD Fermions obstruct dimensional reduction in hot QCD

2000-04-17

arxiv.org/abs/hep-lat/0004011v2

Phys.Rev.Lett. 85 (2000) 2068-2071

Physics

High Energy Physics

High Energy Physics - Lattice

4 pages RevTeX, 2 eps figures included; minor corrections: version for publication

Scientific paper

10.1103/PhysRevLett.85.2068

We have studied, for the first time, screening masses obtained from glueball-like correlators in Quantum Chromodynamics with four light dynamical flavours of quarks in the temperature range 1.5T_c < T < 3T_c, where T_c is the temperature at which the chiral transition occurs. We have also studied pion-like and sigma-like screening masses, and found that they are degenerate in the entire range of T. These obstruct perturbative dimensional reduction since the lowest glueball screening mass is heavier than them. Extrapolation of our results suggests that this obstruction may affect the entire range of temperature expected to be reached even at the Large Hadron Collider.

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