Non-perturbative O(a) improvement of the SU(3) sextet model

Preprint number: CP3-Origins-2017-4 DNRF90
Author: Martin Hansen (CP3-Origins)
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We calculate non-perturbatively the coefficient csw required for O(a) improvement of the SU(3) gauge theory with Nf = 2 fermions in the two-index symmetric (sextet) representation. For the calculations we impose the standard improvement condition in the Schrödinger functional framework, using two different discretisations for the gauge field i.e. the Wilson plaquette action and the tree-level improved Symanzik (Lüscher-Weisz) action.