High sensitivity of a future search for P-odd/T-odd interactions on the 0.75 eV $p$-wave resonance in $\vec{n}+^{139}\vec{\rm La}$ forward transmission determined using pulsed neutron beam
| Title: | High sensitivity of a future search for P-odd/T-odd interactions on the 0.75 eV $p$-wave resonance in $\vec{n}+^{139}\vec{\rm La}$ forward transmission determined using pulsed neutron beam |
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| Authors: | Nakabe, R., Auton, C. J., Endo, S., Fujioka, H., Gudkov, V., Hirota, K., Ide, I., Ino, T., Ishikado, M., Kambara, W., Kawamura, S., Kimura, A., Kitaguchi, M., Kobayashi, R., Okamura, T., Oku, T., Okudaira, T., Okuizumi, M., Munoz, J. G. Otero, Parker, J. D., Sakai, K., Shima, T., Shimizu, H. M., Shinohara, T., Snow, W. M., Takada, S., Takahashi, R., Takahashi, S., Tsuchikawa, Y., Yoshioka, T. |
| Publication Year: | 2023 |
| Collection: | High Energy Physics - Experiment Nuclear Experiment |
| Subject Terms: | Nuclear Experiment, High Energy Physics - Experiment |
| More Details: | 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 $\kappa$, and a ratio of TRIV and PV matrix elements. We determined $\kappa$ to be $0.59\pm0.05$ for $^{139}$La+$n$ using both $(n, \gamma)$ spectroscopy and ($\vec{n}+^{139}\vec{\rm La}$) transmission. This result quantifies for the first time the high sensitivity of the $^{139}$La 0.75~eV $p$-wave resonance in a future search for P-odd/T-odd interactions in ($\vec{n}+^{139}\vec{\rm La}$) forward transmission. |
| Document Type: | Working Paper |
| Access URL: | http://arxiv.org/abs/2312.06115 |
| Accession Number: | edsarx.2312.06115 |
| Database: | arXiv |
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