Renormalization of Flavor Singlet and Nonsinglet Fermion Bilinear Operators

Authors :: Constantinou, M.
Hadjiantonis, M.
Panagopoulos, H.
Publication Year :: 2014
Abstract: We compute the difference in the renormalization of flavor singlet and nonsinglet fermion bilinear operators, to two loops in perturbation theory. Our results are applicable to a rather wide class of lattice actions with Symanzik improved gluons, stout links and clover fermions, including the Twisted Mass and SLiNC actions. A more detailed presentation of our results, along with relevant references, will appear in a forthcoming publication.<br />Comment: Talk presented at the 32nd International Symposium on Lattice Field Theory, 23-28 June, 2014, Columbia University. 7 pages, 3 figures, 2 tables