Lattice2010

Session

Parallel 08: Standard model parameters and renormalization

14 Jun 2010, 16:40

Villasimius, Sardinia

29. One loop matching factors for staggered four-fermion operators with improved glue

Jongjeong Kim (Department of Physics and Astronomy, Seoul National University)

14/06/2010, 16:40

Standard model parameters and renormalization

We present results of one-loop perturbative matching factors for four-fermion operators constructed using HYP/$\overline{\rm FAT7}$ staggered fermions. We use both unimproved (Wilson) and improved (Symanzik) gluon actions. The latter choice of action is relevant to our ongoing project of calculating $B_K$ and $\epsilon'/\epsilon$. To estimate the quantitative effect of using Symanzik...

63. Renormalization constants for one-derivative fermion operators in twisted mass QCD

Martha Constantinou (University of Cyprus)

14/06/2010, 17:00

Standard model parameters and renormalization

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...

89. Renormalisation of composite operators in lattice QCD: perturbative versus nonperturbative

Meinulf Göckeler (Institute for Theoretical Physics, University of Regensburg)

14/06/2010, 17:20

Standard model parameters and renormalization

The perturbative and nonperturbative renormalisation of quark-antiquark operators in lattice QCD with two flavours of clover fermions is investigated within the research programme of the QCDSF collaboration. Operators with up to three derivatives are considered. The nonperturbative results based on the RI-MOM scheme are compared with estimates from one- and two-loop lattice perturbation theory.

87. Heavy-light current-current correlators

Jonna Koponen (University of Glasgow)

14/06/2010, 17:40

Standard model parameters and renormalization

HPQCD Collaboration I will discuss further results from studies of current-current correlators using HISQ quarks, extending on results for hevyonium correlators to the significantly more challenging heavy-light case. The aim of this work is to determine nonperturbative Z factors for heavy-light currents.