arXiv 1702.030992017-02-10nucl-exphysics.ins-det

在J-PARC上使用脉冲中子束的精确中子寿命实验

Precise neutron lifetime experiment using pulsed neutron beams at J-PARC

Naoki Nagakura, Katsuya Hirota, Sei Ieki, Takashi Ino, Yoshihisa Iwashita, Masaaki Kitaguchi, Ryunosuke Kitahara, Kenji Mishima, Aya Morishita, Hideyuki Oide, H… 展开作者

Naoki Nagakura, Katsuya Hirota, Sei Ieki, Takashi Ino, Yoshihisa Iwashita, Masaaki Kitaguchi, Ryunosuke Kitahara, Kenji Mishima, Aya Morishita, Hideyuki Oide, Hidetoshi Otono, Risa Sakakibara, Yoshichika Seki, Tatsushi Shima, Hirohiko M. Shimizu, Tomoaki Sugino, Naoyuki Sumi, Hiroshima Sumino, Kaoru Taketani, Genki Tanaka, Tatsuhiko Tomita, Takahito Yamada, Satoru Yamashita, Mami Yokohashi, Tamaki Yoshioka

备注：: 8 pages, 7 figures, 2 tables, the 26th International Nuclear Physics Conference

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摘要：

中子寿命是弱相互作用的基本参数之一，用于预测早期宇宙中轻元素的丰度。本课题组开发了一种新的装置，在J-PARC的MLF偏振光束分支BL 05处测量寿命，目标精度为0.1%。调试数据于2014年和2015年获得，第一组用于评估寿命的数据于2016年获得，预计统计不确定度为O（1）%。本文介绍了目前的分析结果和未来的计划，以达到我们的目标精度。

英文摘要：

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.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

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