The neutron lifetime (τn) 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 τn 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 τn 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.
|ジャーナル||Proceedings of Science|
|出版ステータス||Published - 2016|
|イベント||26th International Nuclear Physics Conference, INPC 2016 - Adelaide, Australia|
継続期間: 2016 9 11 → 2016 9 16
ASJC Scopus subject areas