6 papers · 1 filter
Non-perturbative renormalisation of four-fermion operators in N_f=2 QCD
P. Dimopoulos, G. Herdoiza, F. Palombi +4
We present results for the non-perturbative renormalisation of four-fermion operators with two flavours of dynamical quarks. We consider both fully relativistic left current-left c…
First quenched results for the matrix elements of the B_{B_s} mixing parameter in the static limit from tmQCD
F. Palombi, M. Papinutto, C. Pena +1
We report on a non-perturbative study of the scale-dependent renormalization factors of a multiplicatively renormalizable basis of Delta B=2 parity-odd four-fermion operators in qu…
Non-perturbative renormalization of static-light four-fermion operators in quenched lattice QCD
Filippo Palombi, Mauro Papinutto, Carlos Pena +1
We perform a non-perturbative study of the scale-dependent renormalization factors of a multiplicatively renormalizable basis of parity-odd four-fermion operators in quenc…
Non-perturbative renormalisation of left-left four-fermion operators with Neuberger fermions
P. Dimopoulos, L. Giusti, P. Hernandez +5
We outline a general strategy for the non-perturbative renormalisation of composite operators in discretisations based on Neuberger fermions, via a matching to results obtained wit…
B0-B0bar mixing in the static approximation from the Schroedinger Functional and twisted mass QCD
F. Palombi, M. Papinutto, C. Pena +1
We discuss the renormalisation properties of parity-odd Delta B=2 operators with the heavy quark treated in the static approximation. Via twisted mass QCD (tmQCD), these operators…
Low-energy couplings of QCD from topological zero-mode wave functions
L. Giusti, P. Hernandez, M. Laine +2
By matching 1/m^2 divergences in finite-volume two-point correlation functions of the scalar or pseudoscalar densities with those obtained in chiral perturbation theory, we derive…