Speaker
Dr
Mauro Papinutto
(Universita "La Sapienza" and INFN Sez. di Roma)
Description
We present preliminary results of a non-perturbative study of the scale-dependent renormalization constants of a complete basis of Delta F=2 parity-odd four-fermion operators that enter the computation of hadronic B-parameters within the SM and beyond.
We consider non-perturbatively O(a) improved Wilson fermions and our gauge configurations contain two flavors of massless sea quarks.
The mixing pattern of these operators is the same as for a regularization that preserves chiral symmetry, in particular there is a "physical" mixing between some of the operators.
The renormalization group running matrix is computed in the continuum limit for a family of Schrödinger Functional (SF) schemes through finite volume recursive techniques. We compute non-perturbatively the relation between the renormalization group invariant operators and their counterparts renormalized in the SF at a low energy scale and we
provide non-perturbative estimates for the matching matrix between the lattice regularized theory and the various SF schemes.
Primary author
Dr
Mauro Papinutto
(Universita "La Sapienza" and INFN Sez. di Roma)
Co-authors
Dr
Carlos Pena Ruano
(Universita Autonoma de Madrid and IFT)
Mr
David Preti
(Universita Autonoma de Madrid)
