Speaker
Dr
Michele Brambilla
(Università di Parma and INFN)
Description
In recent years Numerical Stochastic Perturbation Theory (NSPT) has proven to be a viable tool to perform perturbative computation at high order on the lattice. Despite final results are equivalent to standard Feynman diagrams the approach is rather different and allows a numerical implementation similar to usual (nonperturbative) MonteCarlo.
I will discuss final results for the computation of renormalization constants of quark bilinears for the regularizations defined by nf=2 Wilson fermions/tree level Symanzik improved gauge and nf=4 Wilson fermions/Iwasaki improved gauge. NSPT results will be compared with the ones coming from non perturbative determinations. I will also discuss current developments in the context of clover fermions.
Primary authors
Dr
Francesco Di Renzo
(University of Parma and INFN)
Dr
Michele Brambilla
(Università di Parma and INFN)
