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Field-strength correlators for QCD in a magnetic background

Research paper by Enrico Meggiolaro, Massimo D'Elia, Michele Mesiti, Francesco Negro

Indexed on: 08 Nov '16Published on: 08 Nov '16Published in: arXiv - High Energy Physics - Lattice



Abstract

We present the results of an exploratory study (by means of Monte Carlo simulations on the lattice) of the properties of the gauge-invariant two-point correlation functions of the gauge-field strengths for $N_f=2$ QCD at zero temperature and in the presence of a magnetic background field: the analysis provides evidence for the emergence of anisotropies in the nonperturbative part of the correlators and for an increase of the gluon condensate as a function of the external magnetic field.