Speaker
Martha Constantinou
(University of Cyprus)
Description
We present perturbative and non-perturbative results on the
renormalization constants of the twist-2 vector and axial vector
operators. Non-perturbative results are obtained using the twisted
mass Wilson fermion formulation employing two degenerate dynamical
quarks and the tree-level Symanzik improved gluon action for pion
masses in the range of about 450-260 MeV and at values of
the lattice spacing 0.055, 0.07, 0.089 fm. Subtraction of O(a^2) terms is
carried out by performing the perturbative evaluation of these
operators at 1-loop and up to O(a^2). The renormalization
conditions are defined in the RI'-MOM scheme, for both perturbative
and non-perturbative results. The Z-factors, obtained for different
values of the renormalization scale, are evolved perturbatively to a
reference scale set by the inverse of the lattice spacing. In
addition, they are translated to MS bar at 2 GeV using
3-loop perturbative results for the conversion factors.
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Primary author
Martha Constantinou
(University of Cyprus)
Co-authors
Dr
Constantia Alexandrou
(University of Cyprus)
Mr
Fotos Stylianou
(University of Cyprus)
Dr
Haralambos Panagopoulos
(University of Cyprus)
Dr
Tomasz Korzec
(University of Humboldt)
