| Autor: |
Makoto Uchida, Akane Sakaue, Sho Nagao, A. O. Tokiyasu, Yosuke Taki, Toshiyuki Takahashi, Hiroyuki Fujioka, Yuhei Morino, Toshiyuki Gogami, Emiko Hiyama, S. Ajimura, Tomofumi Nagae, M. Yosoi, Toshio Motoba, Tomokazu Fukuda |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Few Body Syst.. (No. "3") |
| Popis: |
Investigations of double- $$\Lambda $$ hypernuclei, which contain two $$\Lambda $$ hyperons in a nucleus, provide valuable information on baryon–baryon interaction in the strangeness $$-2$$ sector, such as the $$\Lambda $$ – $$\Lambda $$ interaction. Whereas several double- $$\Lambda $$ hypernuclei have been discovered in nuclear-emulsion experiments, an experimental observation of $${}_{\Lambda \Lambda }^{5}$$ H is awaited. It is not only because $$_{\Lambda \Lambda }^{5}$$ H is theoretically expected to be the lightest bound state, but also because $$\Lambda \Lambda $$ – $$\Xi N$$ coupling may play an important role in its structure. On the other hand, the coupling effect may be suppressed in $$_{\Lambda \Lambda }^{6}{\mathrm {He}}$$ .We propose an experiment to investigate $$_{\Lambda \Lambda }^{5}$$ H at J-PARC. $$_{\Lambda \Lambda }^{5}$$ H will be produced by a decay of a $$\Xi $$ hypernucleus, $$_\Xi ^{7}$$ H, which can be produced by the $$^7\mathrm {Li}(K^-,K^+)$$ reaction. The mass of $$_{\Lambda \Lambda }^{5}$$ H will be determined by means of decay pion spectroscopy; it can be calculated from the measured momentum of decay pions, owing to a two-body decay of $$_{\Lambda \Lambda }^{5}$$ H. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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