Status of the J-PARC KOTO experiment

10th International Conference on Kaon Physics

Shiomi, K.^1

Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Ibaraki, Tsukuba

305-0801, Japan^1

关键词: Measure standards;    New physics;    Rare decays;    The standard model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/800/1/012022/pdf
DOI  :  10.1088/1742-6596/800/1/012022

来源: IOP

【 摘 要 】

The KOTO experiment is dedicated to observe the rare decay K0L→ π0v vat J- PARC. The rare decay K0L→ π0v v breaks the CP symmetry directly and is highly suppressed in the Standard Model. This mode is a powerful tool to measure Standard Model parameters and to search for new physics beyond the Standard Model because its theoretical uncertainty is small. We performed the first physics run in May 2013 and collected 20 times more data than the first physics run since 2015. In this paper, results of the first physics run, detector upgrade work after the first physics run, and analysis status of 2015 data are reported.