S ep 1 99 8 NEWS FROM THE LATTICE

ar X iv : h ep - p h / 99 12 28 8 v 1 1 0 D ec 1 99 9 Lattice Calculations and Hadron Physics

ar X iv : h ep - p h / 99 12 28 8 v 2 1 5 D ec 1 99 9 Lattice Calculations and Hadron Physics

ar X iv : h ep - p h / 99 05 38 7 v 1 1 8 M ay 1 99 9 HUB - EP - 99 / 23 Do ultraviolet renormalons contribute to the QCD static potential ?

We find that perturbation theory fails to describe the short range static potential as obtained from quenched lattice simulations, at least for source separations r > (6 GeV)−1. The difference between the nonperturbatively determined potential and perturbation theory at short distance is well parameterised by a linear term with a slope of approximately 1 GeV2, that is significantly bigger than ...

ar X iv : h ep - l at / 9 80 90 10 v 1 2 S ep 1 99 8 Running Coupling in the SU ( 2 ) Lattice Gauge Theory

Scenario according to which the SU(2)-gluodynamics is a theory with a nontrivial fixed point is analyzed from the point of view of the modern Monte-Carlo (MC) lattice data. It is found that an assumption of the first order fixed point g = g f of the beta function β f (g) has no contradictions with existing MC lattice data. The beta function parameters are found from the requirement of constant ...

ar X iv : h ep - l at / 9 80 90 18 v 1 3 S ep 1 99 8 1 Neutral B Meson Mixing and Heavy - Light Decay Constants from Quenched Lattice QCD ∗

We present high-statistics results for neutral B-meson mixing and heavy-light-meson leptonic decays in the quenched approximation from tadpole-improved clover actions at β = 6.0 and β = 6.2. We consider quantities such as BBd(s) , fDd(s) , fBd(s) and the full ∆B = 2 matrix elements as well as the corresponding SU(3)-breaking ratios. These quantities are important for determining the CKM matrix ...