Speaker
Mr
Jakob Simeth
(University of Regensburg)
Description
The quantification and subtraction of hypercubic lattice artifacts is essential for the calculation of non-perturbative renormalization constants. It has been shown that for the RI'-MOM scheme a large part of these artifacts can be calculated using Lattice Perturbation Theory (LPT), but these calculations are typically restricted to 1-loop order and to bilinear quark operators with one derivative at most.
With Numerical Stochastic Perturbation Theory (NSPT) one may overcome this limitation and calculate hypercubic corrections beyond 1-loop order, for any operator and action. In this study, we explore the practicability of this approach and consider, as a first test, the case of Wilson fermion bilinear operators in a quenched theory.
Author
Mr
Jakob Simeth
(University of Regensburg)
Co-authors
Dr
Andre Sternbeck
(University of Regensburg)
Dr
Arwed Schiller
(Leipzig University)
Dr
Holger Perlt
(Leipzig university)
Dr
Meinulf Goeckeler
(University of Regensburg)
