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O(a) Improvement of 2D N=(2,2) Lattice SYM Theory

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arxiv 1711.02319 v2 pith:W4TOK2QH submitted 2017-11-07 hep-lat hep-th

O(a) Improvement of 2D N=(2,2) Lattice SYM Theory

classification hep-lat hep-th
keywords latticeimprovementimprovedtheoryactionconditioncontinuumconvergence
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We perform a tree-level O(a) improvement of two-dimensional N=(2,2) supersymmetric Yang-Mills theory on the lattice, motivated by the fast convergence in numerical simulations. The improvement respects an exact supersymmetry Q which is needed for obtaining the correct continuum limit without a parameter fine tuning. The improved lattice action is given within a milder locality condition in which the interactions are decaying as the exponential of the distance on the lattice. We also prove that the path-integral measure is invariant under the improved Q-transformation.

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