利用UCNA实验的不对称性测量改进对Fierz干涉的限制
核实验
2020-03-25 v1
摘要
超冷中子不对称性（UCNA）实验旨在测量自由中子衰变的衰变不对称参数。在实验中，极化超冷中子被输运至衰变陷阱，其衰变电子以约接受度被探测，由两个提供位置和能量重建的探测器包记录。该实验对中子衰变率中的Fierz干涉项也具有灵敏度。本工作中，我们利用2011–2013年UCNA运行所取数据，从的能量依赖性确定。此外，我们使用较早的2010年数据集给出同类分析。鉴于相比2010年取数运行统计性改善且系统误差相当，我们采用不对称数据集拟合的加权平均给出新的测量：，对应于90%置信水平下的限制。
引用
@article{arxiv.1911.05829,
title = {Improved limits on Fierz Interference using asymmetry measurements from the UCNA experiment},
author = {Xuan Sun and E. Adamek and B. Allgeier and Y. Bagdasarova and D. B. Berguno and M. Blatnik and T. J. Bowles and L. J. Broussard and M. A. -P. Brown and R. Carr and S. Clayton and C. Cude-Woods and S. Currie and E. B. Dees and X. Ding and B. W. Filippone and A. García and P. Geltenbort and S. Hasan and K. P. Hickerson and J. Hoagland and R. Hong and A. T. Holley and T. M. Ito and A. Knecht and C. -Y. Liu and J. Liu and M. Makela and R. Mammei and J. W. Martin and D. Melconian and M. P. Mendenhall and S. D. Moore and C. L. Morris and S. Nepal and N. Nouri and R. W. Pattie and A. Pérez Galván and D. G. Phillips and R. Picker and M. L. Pitt and B. Plaster and D. J. Salvat and A. Saunders and E. I. Sharapov and S. Sjue and S. Slutsky and W. Sondheim and C. Swank and E. Tatar and R. B. Vogelaar and B. VornDick and Z. Wang and W. Wei and J. W. Wexler and T. Womack and C. Wrede and A. R. Young and B. A. Zeck},
journal= {arXiv preprint arXiv:1911.05829},
year = {2020}
}
备注
6 pages, 3 figures. Submission to PRC