ar X iv : h ep - p h / 02 09 14 2 v 1 1 2 Se p 20 02 Determination of α s from Gross - Llewellyn Smith sum rule by accounting for infrared renormalon ∗

ar X iv : h ep - p h / 02 09 33 2 v 1 2 7 Se p 20 02 1 K → ππ Electroweak Penguins in the Chiral Limit

We report on dispersive and finite energy sum rule analyses of the electroweak penguin matrix elements (ππ)2|Q7,8|K 0 in the chiral limit. We accomplish the correct perturbative matching (scale and scheme dependence) at NLO in αs, and we describe two different strategies for numerical evaluation.

ar X iv : h ep - p h / 02 09 22 4 v 1 1 9 Se p 20 02 1 Vector form factor of the pion : A model – independent approach ∗

We study a model–independent parameterization of the vector pion form factor that arises from the constraints of analyticity and unitarity. Our description should be suitable up to √ s ≃ 1.2 GeV and allows a model– independent determination of the mass of the ρ(770) resonance. We analyse the experimental data on τ − → π − π 0 ντ and e + e − → π + π − in this framework, and its consequences on t...

ar X iv : h ep - p h / 02 09 34 6 v 1 2 8 Se p 20 02 B → ργ Decay in the Large Energy Effective Theory

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

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...