https://doi.org/10.1051/epjconf/202227103005
Results of the 𝚵− atomic X-ray measurement in J-PARC E07
1 Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, Japan
2 Department of Physics, Tohoku University, Sendai 980-8578, Japan
3 Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
4 High Energy Nuclear Physics Laboratory, RIKEN, Wako 351-0198, Japan
5 Faculty of Education, Gifu University, Gifu 501-1193, Japan
6 Graduate School of Engineering, Gifu University, Gifu 501-1193, Japan
* e-mail: fujitam@post.j-parc.cjp
Published online: 9 November 2022
Ξ− atomic X-ray spectroscopy is one of the most useful methods for investigation of the Ξ-nucleus strong interaction. A serious problem in the measurement is the significant background coming from in-flight Ξ− decay. For the first Ξ− atomic X-ray spectroscopy experiment, a novel method of identifying stopped Ξ− events using nuclear emulsion was developed to reject background photons from in-flight Ξ− decay. We succeeded in reducing the background to 1/170 by this method employing coincidence measurements using the nuclear emulsion and X-ray detectors.
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
