Advancing physics at next RIBF (ADRIB26)

Two-particle two-hole configurar¥tions and two-body currents for quenching of Gamow-Teller states

Not scheduled

20m

Nishina hall, Nishina Bldg.(E02 in the map), (RIKEN Wako campus)

Contributed talk

Speaker

Prof. HIROYUKI SAGAWA (RIKEN/UNiversiy of Aizu)

Description

I will talk about the effect of 2p-2h configurations on Gamow-Teller states in closed shell nuclei by using Subtracted Second random phase approximation (SSRPA) model. It is found that the 2p-2h configuration mixings induce about 30% of quenching on the Ikeda sum rule in the excitation energy below 25 MeV. I will discuss further the effect of two-body currents derived from chiral effective field theory (EFT) on GT quenching problems.