Results of the 𝚵− atomic X-ray measurement in J-PARC E07
oleh: Fujita Manami, Ishikawa Y., Ukai M., Kanauchi H., Koike T., Tamura H., Hosomi K., Yamamoto T.O., Ekawa H., Hayakawa S.H., Nakazawa K., Yoshida J., Yoshimoto M., Kasagi A., Nishimura N., Hayashi K.
| Format: | Article |
|---|---|
| Diterbitkan: | EDP Sciences 2022-01-01 |
Deskripsi
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.