Lattice2010

Session

Parallel 19: Standard model parameters and renormalization

15 Jun 2010, 08:30

Villasimius, Sardinia

232. Hunting the static energy renormalon

Clemens Bauer (University of Regensburg, Germany)

15/06/2010, 08:30

Standard model parameters and renormalization

We present new results from lattice perturbation theory (LPT) for the the static quark self-energy (SE) obtained from Polyakov loops at high orders (up to 12 loops). For the first time we implemented Numerical Stochastic Perturbation Theory (NSPT) with twisted boundary conditions (TBC), thereby eliminating zero modes. In previous simulations at high beta, TBC were shown to dramatically reduce...

280. Scale r0 and the static potential from the CLS lattices

Björn Leder (Bergische Universitaet Wuppertal)

15/06/2010, 08:50

Standard model parameters and renormalization

We report on the measurement of the static potential and the scale r0 from HYP-smeared Wilson loops in two flavour QCD. We analyse the quark mass dependence of the potential and r0 at two lattice spacings. The high statistics at one of the parameter combinations allows for an estimate of the influence of slow Monte Carlo modes on the the statistical errors. We also compare the QCD static...

236. Current Status of Improved Fermilab Fermions

Mehmet Oktay (The University of Utah)

15/06/2010, 09:10

Standard model parameters and renormalization

Recently, the Fermilab heavy quark action was extended to include dimension six and seven operators in order to reduce the discretization errors. In this talk, we present results of the first numerical simulations with this action where we study the masses of the quarkonium and heavy-light systems and monitor the discretization errors.

185. Computing the B*Bpi coupling with relativistic heavy quarks and domain wall fermions

Patrick Fritzsch (School of Physics & Astronomy, University of Southampton)

15/06/2010, 09:30

Standard model parameters and renormalization

The effective coupling constant $g_{VP\pi}$, describing the coupling of heavy mesons to the pseudoscalar Goldstone bosons (pions), is one of the fundamental parameters of the effective chiral lagrangian for heavy mesons. This coupling encodes non-perturbative QCD effects describing the decay of heavy vector particles into pseudoscalars, $V\to P\pi$. Beside its direct physical relevance in...