The parity-transfer reaction $(^{16}{\rm O},^{16}{\rm F})$ for studies of pionic $0^-$ mode

The spin-dipole (SD) $0^-$ excitation is an important topic in the study of spin-isospin responses in nuclei. Because the $0^-$ excitation carries the same quantum number as a pion, its strength distribution is expected to reflect pion-like correlations in nuclei such as tensor correlations. Despite this importance, experimental information on $0^{-}$ states is very limited because of a lack of experimental tools that are suitable for $0^{-}$ studies. we propose a new probe, a parity-transfer $({}^{16}{\rm O},{}^{16}{\rm F}(0^-))$ reaction for $0^-$ studies. The parity-transfer reaction uses $0^+ \rightarrow 0^{-}$ transition in the projectile to probe $0^-$ states in a target nucleus. This reaction has unique sensitivity to unnatural parity states, which is an advantage over other reactions used so far. For the first parity-transfer measurement, we performed a ${}^{12}{\rm C}({}^{16}{\rm O},{}^{16}{\rm F}(0^-)){}^{12}{\rm B}$ experiment at the RIKEN RIBF facility by using a SHARAQ spectrometer. In this presentation, we will report the details of the experiment and the results.