High sensitivity of a future search for effects of -odd/-odd interactions on the 0.75 eV -wave resonance in + forward transmission determined using a pulsed neutron beam

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

Neutron transmission experiments can offer a new type of highly sensitive search for time-reversal invariance violating (TRIV) effects in nucleon-nucleon interactions via the same enhancement mechanism observed for large parity violating (PV) effects in neutron-induced compound nuclear processes. In these compound processes, the TRIV cross-section is given as the product of the PV cross-section, a spin-factor , and a ratio of TRIV and PV matrix elements. We determined to be 0.59 0.05 for La+n using both (n, ) spectroscopy and (+) transmission. This result quantifies for the first time the high sensitivity of the La 0.75 eV -wave resonance in a future search for -odd/-odd interactions in (+) forward transmission.