ar X iv : h ep - l at / 0 20 91 09 v 1 1 2 Se p 20 02 1 QCD String Spectrum 2002

ar X iv : h ep - l at / 0 20 91 18 v 1 1 3 Se p 20 02 1 Monopole Condensation in full QCD using the Schrödinger Functional

We use a lattice thermal partition functional to study Abelian monopole condensation in full QCD with N f = 2 staggered fermions. We present preliminary results on 16 3 × 4 and 32 3 × 4 lattices.

ar X iv : h ep - l at / 0 20 91 07 v 1 1 1 Se p 20 02 1 Effects of Quenching in ∆ I = 1 / 2 Kaon Decays ∗

We present the inconsistencies which arise in quenched QCD in ∆I = 1/2 non-leptonic kaon decays using chiral perturbation theory (χPT) to one loop. In particular we discuss how the lack of unitarity of the quenched theory invalidates the usual methods for the extraction of matrix elements from correlation functions.

ar X iv : h ep - l at / 0 20 91 08 v 1 1 1 Se p 20 02 1 K → ππ Decay Amplitude on the Lattice

Recent theoretical and numerical progresses of the lattice calculations of K → ππ decay amplitude are reviewed.

ar X iv : h ep - l at / 0 20 91 22 v 1 1 3 Se p 20 02 1 The determination of α s from lattice QCD with 2 + 1 flavors of dynamical

We describe the first lattice determination of the strong coupling constant with 3 flavors of dynamical quarks. The method follows previous analyses in using a perturbative expansion for the plaquette and Upsilon spectroscopy to set the scale. Using dynamical configurations from the MILC collaboration with 2+1 flavors of dynamical quarks we are able to avoid previous problems of haivng to extra...

ar X iv : h ep - e x / 02 09 04 3 v 1 1 8 Se p 20 02 1 Elementary Hadronic Interactions at the CERN SPS