Precise neutron lifetime experiment using pulsed neutron beams at J-PARC
Nuclear Experiment
2017-02-13 v1 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.
Cite
@article{arxiv.1702.03099,
title = {Precise neutron lifetime experiment using pulsed neutron beams at J-PARC},
author = {Naoki Nagakura and Katsuya Hirota and Sei Ieki and Takashi Ino and Yoshihisa Iwashita and Masaaki Kitaguchi and Ryunosuke Kitahara and Kenji Mishima and Aya Morishita and Hideyuki Oide and Hidetoshi Otono and Risa Sakakibara and Yoshichika Seki and Tatsushi Shima and Hirohiko M. Shimizu and Tomoaki Sugino and Naoyuki Sumi and Hiroshima Sumino and Kaoru Taketani and Genki Tanaka and Tatsuhiko Tomita and Takahito Yamada and Satoru Yamashita and Mami Yokohashi and Tamaki Yoshioka},
journal= {arXiv preprint arXiv:1702.03099},
year = {2017}
}
Comments
8 pages, 7 figures, 2 tables, the 26th International Nuclear Physics Conference