Programme

O.21 -- Oral, VCTP-46

Date: Wednesday, 6 October 2021

Time: 11:10 - 11:30

Calculating multipole form factors and investigating the influence of the weak interaction in e-6Li elastic scattering at high energies

Luong Zuyen Phu (1), Vo Minh Truong (2)

(1): Dalat Nuclear Research Institute (2): Mien Tay Construction University, PhD Student of Vietnam Atomic Energy Institute

Scattering processes at low energies can be accurately described by the electromagnetic theory since the electromagnetic interaction plays a dominant role. However, at high energies of GeV and more, the weak interaction becomes significant. Therefore, we use the unified electroweak interaction theory and extend to the electron-nuclear scattering to confirm the participation and role of the weak interaction and also test this theory when applying for complex systems. In this research, the scattering cross section will be expanded to the multipole form factors in the framework of the unified electroweak interaction theory by means of the multipole expansion method. The multipole form factors are the reduced matrix elements of the multipole operators. The electromagnetic current multipole operator expressions are completely recomputed in the Willey’s manner and the newly calculated weak current multipole operator expressions are also based on the multiparticle shell model but at high energies. By using the calculating formulae for the reduced matrix elements of the tensor operators, we have fully established the formulae for calculating the multipole form factors of the nucleus A = 6. Applying the given formulae, we have also calculated the expressions of all multipole form factors that are present in the e-6Li elastic scattering cross section when the nucleus is in the ground state. On the basis of the calculated multipole form factors, we investigate the influence of weak interaction through the ratio of the interference and weak interaction term to the electromagnetic interaction term corresponding to the different incident electron energy values.

Presenter: Vo Minh Truong