Antihydrogen atoms, H― , are now routinely created and can be stored for long enough to allow comparison with ordinary matter. A major goal of these efforts is test potential physics beyond the Standard...

A multi-channel R-matrix code has been developed and used to analyse two key reactions in the CNO cycle. The N(p,γ)O reaction determines the rate of operation of the CN cycle and is critical in determining the age of globular clusters, which give estimates for the age of the universe. The low energy S-factors determined are in good agreement with recent estimates. A preliminary analysis of the ...

For the Hamiltonian integrable systems governed by SL(2)-invariant r-matrix (such as Heisenberg magnet, Toda lattice, nonlinear Schrödinger equation) a general procedure for constructing Bäcklund transformation is proposed. The corresponding BT is shown to preserve the Poisson bracket. The proof is given by a direct calculation using the r-matrix expression for the Poisson bracket.