Fermions obstruct dimensional reduction in hot QCD

Abstract

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.

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

Cited by in corpus (21)

• Quark-Gluon Plasma as a Condensate of Z(3) Wilson Lines
• The Status of Lattice QCD at Finite Temperature
• Meson screening masses from lattice QCD with two light and the strange quark
• Two-point functions for SU(3) Polyakov Loops near T_c
• Susceptibilities and screening masses in two flavor QCD
• The K/pi ratio from condensed Polyakov loops
• Explosive Decomposition in Ultrarelativistic Heavy Ion Collision
• Linking the chiral and deconfinement phase transitions
• A precise determination of T_c in QCD from scaling
• Properties of the Quark Gluon Plasma: A lattice perspective
• The Spatial String Tension and Dimensional Reduction in QCD
• Lattice calculations of meson correlators and spectral functions at finite temperature
• Glueballs amass at RHIC and LHC Colliders! - The early quarkless 1st order phase transition at $T=270$ MeV - from pure Yang-Mills glue plasma to GlueBall-Hagedorn states
• Quenched QCD at finite temperature with chiral Fermions
• Langevin Evolution of Disoriented Chiral Condensate
• Screening correlators with chiral Fermions
• Quasi-static probes of the QCD plasma
• The Quark Gluon Plasma: lattice computations put to experimental test
• Static correlation lengths in QCD at high temperature and finite density
• Obstructions to dimensional reduction in hot QCD
• Quenched QCD at finite temperature with overlap Fermions