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Trapping probability of strangeness via Xi− hyperon capture at rest in nuclear emulsion
http://hdl.handle.net/20.500.12678/0000000728
http://hdl.handle.net/20.500.12678/0000000728b7771711-db76-41a8-8e6d-23a790f74930
304e0cc5-0b8a-4876-bb4f-492edbf0d62d
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Trapping probability of strangeness via Xi−.pdf (3518 Kb)
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Journal article | ||||||
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Publication | ||||||
Title | ||||||
Title | Trapping probability of strangeness via Xi− hyperon capture at rest in nuclear emulsion | |||||
Language | en | |||||
Publication date | 2019 | |||||
Authors | ||||||
Aye Moh Moh Theint | ||||||
Ekawa, Hiroyuki | ||||||
Kasagi, Ayumi | ||||||
Kinbara, Shinji | ||||||
May Sweet | ||||||
Khin Than Tint | ||||||
Yoon, Chun Sil | ||||||
Yoshida, Junya | ||||||
Yoshimoto, Masahiro | ||||||
Nakazawa, Kazuma | ||||||
Description | ||||||
In the E373 experiment at KEK-PS, we have located nearly 2 × 104 stopping events of Ξ− hyperon candidates in nuclear emulsion. Among these, the identification of the Ξ− hyperon was performed with the constant sagitta (CS) method, by measuring multiple Coulomb scattering for 695 clear stopping events, σ-stop, with emission of nuclear fragments due to negatively charged hadrons. With use of a Geant4 simulation, the parameters for the CS method were optimized and we obtained the number of real Ξ− stopping events to be 432.3±7.6+ 0.0−14.0 with 3.2% systematic error by contamination by the Σ− hyperon. We have classified the events for Ξ− hyperon capture by light (C, N, O) and heavy (Ag, Br) elements in the emulsion. The trapping probabilities of two Λ hyperons for light and heavy nuclei were found to be 5.0±1.7% and 4.2±1.4%, respectively, for σ-stop via Ξ− hyperon capture at rest in the emulsion. For at least one Λ trapping, the probabilities were 69.4±8.1% for light nuclei and 51.1±5.7% for heavy nuclei. These results allow us to present the trapping probabilities of Λ hyperons via Ξ− hyperon capture at rest in emulsion for the first time, because the previous E176 experiment showed the lower limits due to fewer statistics. | ||||||
Keywords | ||||||
Trapping probability | ||||||
Identifier | https://umoar.mu.edu.mm/handle/123456789/382 | |||||
Journal articles | ||||||
2 | ||||||
Progress of Theoretical and Experimental Physics,021D01 | ||||||
2019 | ||||||
Conference papaers | ||||||
Books/reports/chapters | ||||||
Thesis/dissertations |