ar X iv : h ep - p h / 02 09 28 4 v 1 2 4 Se p 20 02 1 Canonical aspects of strangeness enhancement

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

X iv : h ep - p h / 02 09 28 3 v 1 2 4 Se p 20 02 η b Decay into Two Photons

We discuss the theoretical predictions for the two photon decay width of the pseudoscalar η b meson. Predictions from potential models are examined. It is found that various models are in good agreement with each other. Results for η b are also compared with those from Υ data through the NRQCD procedure.

ar X iv : h ep - p h / 02 09 28 9 v 1 2 4 Se p 20 02 DISPERSIVE TREATMENT OF K → ππ

We discuss a new method to treat the K → ππ amplitude dispersively, taking into full account the effects of final state interatcions. Our approach is based on a set of dispersion relations for the K → ππ amplitude, in which the weak Hamiltonian carries momentum. In these dispersion relations two subtraction constants have to be introduced, whereby one can be related via a soft pion theorem to t...

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.