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22–26 Sep 2025
Asia/Shanghai timezone

Toward the first experiments of T-violation search in neutron-induced compound nuclear reaction

Not scheduled
20m
Oral Fundamental symmetries and spin physics beyond the standard model

Speaker

Masataka Iinuma (Hiroshima University, AdSE)

Description

The CP violation beyond the standard model is not only physically interesting on its own, but also a key for understanding the baryon asymmetry in the current universe. In a low energy region, instead of directly probing it, many efforts to search the violation of time-reversal symmetry(T-violation) continue in various physics systems with high sensitivity. Among those, neutron-induced compound nuclear reactions are interesting because the enhancement of parity-nonconservation effect(PNC) has been found in many compound nuclear states. Particularly, in the neutron resonant absorption in Lanthernum nuclei(La) at 0.75eV, the enhancement is so great that it reaches 10^6. This enhancement for the PNC can be also expected for the T-violation from recent experimental results and theoretical calculations. Additionally, this system is sensitive to a different physical parameter indicating the magnitude of the T-violation from the neutron EDM, so that it is also attractive in terms of a different search region. Thus, the NOPTREX collaboration is planning the T-violation search with La targets as a first attempt. One big issue is the development of a polarized La target because polarized targets except for proton and deuteron have not been realized yet as a practical use. In this presentation, we will introduce the overview of the first stage of the T-violation experiment, Phase-I, and report current status in the NOPTREX project.

Primary authors

Ms Amane Suzuki (Yamagata University) Prof. Atsushi Kimura (JAEA) Mr Clayton Auton (Indiana University) Dr Daisuke Miura (Yamagata University) Dr Danielle Schaper (Indiana University) Mr Gabe Otero Munoz (Indiana University) Prof. Hideki Kohri (Osaka University, RCNP) Prof. Hirohiko Shimizu (Nagoya University) Mr Hiroki Hotta (Nagoya University) Prof. Hiroyuki Fujioka (Institute of Science Tokyo) Mr Ikuo Ide (Nagoya University) Prof. Joseph Parker (CROSS) Mr Kanta Asai (Nagoya University) Prof. Katsuya Hirota (KEK) Prof. Kazuki Ohishi (CROSS) Prof. Kenji Sakai (JAEA) Mr Kohei Ishizaki (Nagoya University) Prof. Kylie Dickerson (Indiana University) Ms Mao Okuizumi (Nagoya University) Prof. Masaaki Kitaguchi (Nagoya University) Prof. Masaki Fujita (Tohoku University) Prof. Masaru Yosoi (Osaka University, RCNP) Masataka Iinuma (Hiroshima University, AdSE) Prof. Mofan Zhang (CSNS) Prof. Motoyuki Ishikado (CROSS) Mr Naoki Hagiwara (Institute of Science Tokyo) Prof. Nobuo Wada (Nagoya University) Dr Rintaro Nakabe (JAEA) Prof. Ruirui Fan (CSNS) Mr Ryogo Akao (Yamagata University) Prof. Ryuju Kobayashi (JAEA) Prof. Ryuta Takahashi (JAEA) Prof. Shigeru Ishimoto (KEK) Dr Shingo Takahashi (Ibaraki University) Ms Shiori Kawamura (Nagoya University) Dr Shunsuke Endo (JAEA) Dr Shusuke Takada (Tohoku University) Prof. Takahiro Iwata (Yamagata University) Prof. Takahiro Okamura (KEK) Prof. Takanori Taniguchi (Tohoku University) Prof. Takashi Ino (KEK) Prof. Takayuki Kumada (JAEA) Prof. Takayuki Oku (JAEA) Prof. Takenao Shinohara (JAEA) Prof. Taku Matsushita (Nagoya University) Mr Takumi Sato (Yamagata University) Prof. Takuya Okudaira (Nagoya University) Prof. Tamaki Yoshioka (Kyushu University) Prof. Tatsushi Shima (Osaka University, RCNP) Prof. Toshiaki Morikawa (CROSS) Prof. Vladimir Gudkov (University of South Carolina) Prof. Wataru Kambara (JAEA) Prof. Willam Snow (Indiana University) Prof. Xin Tong (CSNS) Prof. Yoichi Ikeda (Tohoku University) Prof. Yoshihisa Iwashita (Osaka University, RCNP) Mr Yoshiki Hiruma (Yamagata University) Prof. Yoshiyuki Miyachi (Yamagata University) Mr Yu Goto (Nagoya University) Mr Yuki Ito (Nagoya University) Prof. Yusuke Tsuchikawa (JAEA) Mr Yuya Takanashi (Yamagata University)

Presentation materials

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