ar X iv : n uc l - th / 9 50 80 11 v 2 1 1 A ug 1 99 5 THE d ’ - DIBARYON IN THE NONRELATIVISTIC QUARK MODEL

ar X iv : n uc l - th / 9 90 60 29 v 3 1 5 Ju l 1 99 9 1 Quark Matter ’ 99 — Theoretical Summary : What Next ?

ar X iv : n uc l - th / 0 50 80 60 v 1 2 9 A ug 2 00 5 Spin observables in p̄p → ΛΛ and density - matrix constraints

The positivity conditions of the spin density matrix constrain the spin observables of the reaction p̄p → ΛΛ, leading to model-independent, non-trivial inequalities. The formalism is briefly presented and examples of inequalities are provided.

ar X iv : n uc l - th / 9 50 80 19 v 1 1 0 A ug 1 99 5 Instabilities in nuclei

The evolution of dynamical perturbations is examined in nuclear multifragmentation in the frame of Vlasov equation. Both plane wave and bubble type of perturbations are investigated in the presence of surface (Yukawa) forces. An energy condition is given for the allowed type of instabilities and the time scale of the exponential growth of the instabilities is calculated. The results are compare...

ar X iv : d g - ga / 9 50 80 01 v 1 3 A ug 1 99 5 On the L n 2 - norm of Scalar Curvature

Comparisons on L n 2-norms of scalar curvatures between Riemannian metrics and standard metrics are obtained. The metrics are restricted to conformal classes or under certain curvature conditions.

ar X iv : n uc l - th / 9 80 30 15 v 1 5 M ar 1 99 8 ω and ρ Photoproduction with an Effective Quark Model Lagrangian

An unified approach for vector meson photoproduction is presented in the constituent quark model. The sand u-channel resonance contributions are generated using an effective quark vector-meson Lagrangian. In addition, taking into account π and σ t-channel exchanges for diffractive production, the available total and differential cross section data for ω, ρ, ρ, and ρ− photoproduction can be well...