Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session 2WDA: Fundamental Physics at Low Energy III
2:00 PM–4:00 PM,
Tuesday, October 23, 2018
Hilton
Room: Kohala 3
Chair: David Hertzog, University of Washington
Abstract ID: BAPS.2018.HAW.2WDA.2
Abstract: 2WDA.00002 : Discrete symmetry in compound nuclei*
2:30 PM–3:00 PM
Presenter:
Masaaki Kitaguchi
(Nagoya University)
Authors:
Masaaki Kitaguchi
(Nagoya University)
Shunsuke Endo
(Nagoya University)
Takuhiro Fujiie
(Nagoya University)
Hiroyuki Fujioka
(Tokyo Institute of Technology)
Christopher Haddock
(High Energy Accelerator Research Organization (KEK))
Katsuya Hirota
(Nagoya University)
Masataka Iinuma
(Hiroshima University)
Kohei Ishizaki
(Nagoya University)
Atsushi Kimura
(JAEA)
Jun Koga
(Kyushu University)
Sou Makise
(Kyushu University)
Yudai Niinomi
(Nagoya University)
Takayuki Oku
(JAEA)
Takuya Okudaira
(JAEA)
Kenji Sakai
(JAEA)
Takumi Sato
(Nagoya University)
Hirohiko M Shimizu
(Nagoya University)
Shusuke Takada
(Kyushu University)
Yuika Tani
(Tokyo Institute of Technology)
Tomoki Yamamoto
(Nagoya University)
Tamaki Yoshioka
(RCAPP, Kyushu Univ.)
We are discussing new approach to search for the time reversal symmetry violation, which is different from EDM experiments. The large enhancement of parity violation of the weak interaction contained in the nuclear interaction was discovered for some nuclei in the 1980's. The enhancement was explained as the result of the entrance channel interference between neighboring partial wave amplitudes. The enhancement of T-violation is also predicted with the same mechanism. The advantage to apply the mechanism is that takes T-odd effects due to the final-state interaction is expected to be negligibly small as the neutron propagation through the target material can be described by the neutron optics.
The enhancement can be estimated by measuring the angular correlation terms of (n, γ) reaction according to s-p mixing theory with statistical treatments in the compound nuclei. We are continuing measurements of the (n, γ) reactions of the candidate nuclei at J-PARC. Intense pulsed neutrons and high energy-resolution germanium detectors enables us to measure the partial neutron width only with the γ-rays corresponding to the well-known spin-states in order to extract the enhancement factor.
The T-violation search experiment requires the polarized neutron beam, the polarized nuclear target, and epithermal neutron detector. The research and development for the T-violation search experiment has also started. In the presentation, we will discuss the feasibility of the experiment at J-PARC.
*KEK S-type research projects with program numbers : 2014S03, 2015S12, and 2018S12 MEXT KAKENHI Grant No. JP19GS0210 and JSPS KAKENHI Grant No. JP17H02889
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.2WDA.2
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