Spin dependence in the -wave resonance of +

Okudaira, Takuya*; Nakabe, Rintaro*; Auton, C. J.*; Endo, Shunsuke   ; Fujioka, Hiroyuki*; Gudkov, V.*; Ide, Ikuo*; Ino, Takashi*; Ishikado, Motoyuki*; Kambara, Wataru*; Kawamura, Shihori; Kobayashi, Ryuju*; Kitaguchi, Masaaki*; Okamura, Takahiro*; Oku, Takayuki   ; Otero Munoz, J. G.*; Parker, J. D.*; Sakai, Kenji ; Shima, Tatsushi*; Shimizu, Hirohiko*; Shinohara, Takenao   ; Snow, W. M.*; Takada, Shusuke*; Tsuchikawa, Yusuke ; Takahashi, Ryuta*; Takahashi, Shingo; Yoshikawa, Hiromoto*; Yoshioka, Tamaki*

We measured the spin dependence in a neutron-induced p-wave resonance by using a polarized epithermal neutron beam and a polarized nuclear target. Our study focuses on the 0.75 eV -wave resonance state of La+n, where largely enhanced parity violation has been observed. We determined the partial neutron width of the -wave resonance by measuring the spin dependence of the neutron absorption cross section between polarized La and polarized neutrons. Our findings serve as a foundation for the quantitative study of the enhancement effect of the discrete symmetry violations caused by mixing between partial amplitudes in the compound nuclei.