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...
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...
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.
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.
