Abstract
SU(2) gauge theory is investigated with a lattice action which is insensitive to small perturbations of the lattice gauge fields. Bare perturbation theory can not be defined for such actions at all. We compare non-perturbative continuum results with that obtained by the usual Wilson plaquette action. The compared observables span a wide range of interesting phenomena: zero temperature large volume behavior (topological susceptibility), finite temperature phase transition (critical exponents and critical temperature) and also the small volume regime (discrete β-function or step-scaling function). In the continuum limit perfect agreement is found indicating that universality holds for these topological lattice actions as well.
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ArXiv ePrint: 1807.05295
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Nogradi, D., Szikszai, L. & Varga, Z. Non-abelian lattice gauge theory with a topological action. J. High Energ. Phys. 2018, 32 (2018). https://doi.org/10.1007/JHEP08(2018)032
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DOI: https://doi.org/10.1007/JHEP08(2018)032