2013/10/22 by Daniel Robaina, Harvey B. Meyer, Robaina, Daniel +1
Physics and Astronomy · Engineering · #Quantum Chromodynamics and Particle Interactions #High-Energy Particle Collisions Research #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.1310.6075
In order to extract transport quantities from energy-momentum-tensor (EMT)\ncorrelators in Lattice QCD there is a strong need for a non-perturbative\nrenormalization of these operators. This is due to the fact that the lattice\nregularization explicitly breaks translational invariance, invalidating the\nnon-renormalization-theorem. Here we present a non-perturbative calculation of\nthe renormalization constant of the off-diagonal components of the EMT in SU(3)\npure gauge theory using lattices with shifted boundary conditions. This allows\nus to induce a non-zero momentum in the system controlled by the shift\nparameter and to determine the normalization of the momentum density operator.\n