- th / 9 70 60 74 v 2 1 6 O ct 1 99 7 Possible solution to basic problems regarding the coupling constants G

th / 9 70 40 12 v 1 9 A pr 1 99 7 Constraints on the coupling constants of σ − and ω − mesons to ∆ - isobars

The effects of the presence of ∆-isobars in nuclear matter are studied in the framework of relativistic mean-field theory. The existence of stable nuclei at saturation density imposes constraints on the coupling constants of the σand ω-meson with ∆-isobars. The range of possible values for the scalar and vector coupling constants of ∆-isobars with respect to the nucleon coupling is investigated...

- th / 0 60 70 03 v 3 1 9 O ct 2 00 6 Final State Interaction Effects in the e + e − → NN̄ Process near Threshold

- th / 9 70 40 12 v 2 1 2 M ay 1 99 8 Constraints on the relativistic mean field of ∆ - isobar in nuclear matter

The effects of the presence of ∆-isobars in nuclear matter are studied in the framework of relativistic mean-field theory. The existence of stable nuclei at saturation density imposes constraints on the ∆-isobar self-energy and thereby on the meanfield coupling constants of the scalar and vector mesons with ∆-isobars. The range of possible values for the scalar and vector coupling constants of ...

uc l - th / 9 60 20 08 v 1 7 F eb 1 99 6 The Breathing Modes of the B = 2 Skyrmion and the Spin - Orbit Interaction

The coupling of the breathing and rotational modes of the skyrmionskyrmion system leads to a nucleon-nucleon spin-orbit interaction of short range, as well as to spin-orbit potentials for the transitionsNN → N(1440)N , NN → NN(1440) and NN → N(1440)N(1440). The longest range behaviour of these spin-orbit potentials is calculated in closed form. Preprint HU-TFT-96-57

ar X iv : g r - qc / 9 60 70 16 v 1 5 J ul 1 99 6 Exact Solution for Relativistic Two - Body Motion in Dilaton Gravity

We present an exact solution to the problem of the relativistic motion of 2 point masses in (1 + 1) dimensional dilaton gravity. The motion of the bodies is governed entirely by their mutual gravitational influence, and the spacetime metric is likewise fully determined by their stress-energy. A Newtonian limit exists, and there is a static gravitational potential. Our solution gives the exact H...