| Issue |
EPJ Web Conf.
Volume 271, 2022
HYP2022 - 14th International Conference on Hypernuclear and Strange Particle Physics
|
|
|---|---|---|
| Article Number | 03005 | |
| Number of page(s) | 4 | |
| Section | S=-2 Systems | |
| DOI | https://doi.org/10.1051/epjconf/202227103005 | |
| Published online | 09 November 2022 | |
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
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