Programme

O.7 -- Oral, VCTP-44

Date: Monday, 29 July 2019

Time: 16:50 - 17:10

Introduction of the extended Jost function formalism for S-matrix analysis of nucleon-nucleus scattering

K. Mizuyama (1), N. Nhu Le(2), T. Dieu Thuy (2), and T. V. Nhan Hao (2)

(1) Institute of Research and Development, Duy Tan University, Da Nang City, Vietnam; (2) Faculty of Physics, University of Education, Hue University, 34 Le Loi Street, Hue City, Vietnam

The structure of sharp resonances which are observed at several MeV region of the nucleon-nucleus (NA) scattering is one of the most useful and important characteristic of nucleus. The candidates of the origin of the sharp resonances are the channel-coupling and pairing effect (configuration mixing of the particle and hole states). The application of the particle-vibration-coupling (PVC) method to the NA scattering [1,2,3] has shown the results which is consistent with the qualitative consequences from the Feshbach projection theory[4]. The cPVC calculation [1] has succeeded also the partial reproduction of the sharp resonances. These recent progresses may indicate that the PVC model is the candidate of a new optical model which covers both resonance and continuum energy region for NA scattering. The pairing correlation is one of the most important fundamental properties of nuclear structure, however, the role of the pairing correlation for the NA scattering is still not so clear yet. The S-matrix analysis is one of the most powerful way for the investigation of resonances. The Jost function [5] has been known as very useful framework for the description of the S-matrix and the bound states structure of the system. Very recently, we extended the Jost function framework based on the Hartree-Fock-Bogoliubov formalism [6] in order to investigate the role of the pairing correlation for the NA scattering and the nuclear structure at the same time. In our presentation, we are planning to introduce the Jost function, our recent results and progress, and also explain about our future plan.
References
[1] Kazuhito Mizuyama, Kazuyuki Ogata, Phys. Rev. C 86, 041603(R), 2012.
[2] T.V. Nhan Hao, Bui Minh Loc, Nguyen Hoang Phuc, Phys.Rev. C92, 014605 (2015).
[3] G. Blanchon, M. Dupuis, H.F. Arellano, N. Vinh Mau, Phys.Rev. C91, 014612 (2015).
[4] H. Feshbach, Ann. of Phys. 5, 357 (1958).
[5] R. Jost and A. Pais, Phys. Rev. 82, 840 (1951).
[6] K. Mizuyama, N. Nhu Le, T. Dieu Thuy, and T. V. Nhan Hao, Phys. Rev. C99, 054607 (2019).

Presenter: Kazuhito Mizuyama