V.I. Zhaba. Stapp parameterization and scattering phases for coupled states // World Scientific News. – 2019. – Vol. 129. – P. 255-262. 

http://www.worldscientificnews.com/wp-content/uploads/2019/04/WSN-129-2019-255-262.pdf


Stapp parameterization and scattering phases for coupled states


V. I. Zhaba

Uzhgorod National University, Department of Theoretical Physics
54, Voloshyna St., Uzhgorod, UA-88000, Ukraine

E-mail address: viktorzh@meta.ua


ABSTRACT

Variable phase approach is viewed for two-channel scattering. The search of the scattering phases and mixing parameter for coupled states 3S1–3D1 using Stapp parameterization is carried out. The nucleon-nucleon potential in the coordinate representation is used for numerical calculations. The influence of the choice of a numerical method (method Euler and methods Runge-Kutta) on the calculations of scattering phases and the mixing parameter is taken into account.

Keywords: variable phase approach, shifts, deuteron, parameterization, coupled states.