ar X iv : h ep - p h / 04 07 25 8 v 2 3 J ul 2 00 5 Bound States and Critical Behavior of the Yukawa Potential ∗

ar X iv : h ep - p h / 04 07 25 8 v 1 2 1 Ju l 2 00 4 Bound States and Critical Behavior of the Yukawa Potential ∗

We investigate the bound states of the Yukawa potential V (r) = −λ exp(−αr)/r, using different algorithms: solving the Schrödinger equation numerically and our Monte Carlo Hamiltonian approach. There is a critical α = αC , above which no bound state exists. We study the relation between αC and λ for various angular momentum quantum number l, and find in atomic units, αC(l) = λ[A1 exp(−l/B1) + A...

ar X iv : h ep - p h / 04 07 07 9 v 1 7 J ul 2 00 4 Multi - leg calculations with the GRACE / 1 - LOOP system

ar X iv : h ep - p h / 03 07 03 8 v 1 2 J ul 2 00 3 1 Scalar meson exchange in Φ → P 0 P 0 γ decays ∗

ar X iv : h ep - p h / 03 05 16 8 v 2 5 J ul 2 00 3 Neutrino Mixing and the Minimal 3 - 3 - 1 Model

In the minimal 3-3-1 model charged leptons come in a non-diagonal basis. Moreover the Yukawa interactions of the model lead to a non-hermitian charged lepton mass matrix. In other words, the minimal 3-3-1 model presents a very complex lepton mixing. In view of this we check rigorously if the possible textures of the lepton mass matrices allowed by the minimal 3-3-1 model can lead or not to the ...

ar X iv : h ep - p h / 04 07 10 1 v 1 8 J ul 2 00 4 Perfect Fluid Theory and its Extensions

We review the canonical theory for perfect fluids, in Eulerian and Lagrangian formulations. The theory is related to a description of extended structures in higher dimensions. Internal symmetry and supersymmetry degrees of freedom are incorporated. Additional miscellaneous subjects that are covered include physical topics concerning quantization, as well as mathematical issues of volume preserv...