1. Precise neutron lifetime experiment using pulsed neutron beams at J-PARC
- Author
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Nagakura, Naoki, Hirota, Katsuya, Ieki, Sei, Ino, Takashi, Iwashita, Yoshihisa, Kitaguchi, Masaaki, Kitahara, Ryunosuke, Mishima, Kenji, Morishita, Aya, Oide, Hideyuki, Otono, Hidetoshi, Sakakibara, Risa, Seki, Yoshichika, Shima, Tatsushi, Shimizu, Hirohiko M., Sugino, Tomoaki, Sumi, Naoyuki, Sumino, Hiroshima, Taketani, Kaoru, Tanaka, Genki, Tomita, Tatsuhiko, Yamada, Takahito, Yamashita, Satoru, Yokohashi, Mami, and Yoshioka, Tamaki
- Subjects
Nuclear Experiment ,Physics - Instrumentation and Detectors - Abstract
The neutron lifetime is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure the lifetime with the goal precision of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning data was acquired in 2014 and 2015, and the first set of data to evaluate the lifetime in 2016, which is expected to yield a statistical uncertainty of O(1)%. This paper presents the current analysis results and the future plans to achieve our goal precision., Comment: 8 pages, 7 figures, 2 tables, the 26th International Nuclear Physics Conference
- Published
- 2017