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Observation of Coulomb-assisted nuclear bound state of $$Xi^-$$-$$^{14}$$N system

Hayakawa, Shuhei; Fujita, Manami; Hasegawa, Shoichi   ; Hashimoto, Tadashi   ; Hosomi, Kenji  ; Ichikawa, Yudai   ; Imai, Kenichi*; Nanamura, Takuya; Naruki, Megumi; Sako, Hiroyuki   ; Sato, Susumu  ; Tamura, Hirokazu; Tanida, Kiyoshi   ; Yamamoto, Takeshi  ; 84 of others*

In an emulsion-counter hybrid experiment performed at J-PARC, a $$Xi^-$$ absorption event was observed which decayed into twin single-$$Lambda$$ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as $$Xi^{-} + ^{14}$$N$$ rightarrow ^{10}_Lambda$$Be + $$^5_Lambda$$He. For the binding energy of the $$Xi^{-}$$ hyperon in the $$Xi^-$$-$$^{14}$$N system a value of $$1.27 pm 0.21$$ MeV was deduced. The energy level of $$Xi^-$$ is likely a nuclear $$1p$$ state which indicates a weak $${Xi}N$$-$$LambdaLambda$$ coupling.

Language

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English

Journal

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Physical Review Letters

Volume

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126

Number

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6

Pages

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p.062501_1 - 062501_6

Publication Year/Month

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2021/02

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Held date

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Location (city)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.1103/PhysRevLett.126.062501

DOI for research data

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Link to research data related to this paper/report.

Keywords

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ハイパー核

Research Facility

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J-PARC原子核素粒子実験施設  

Press Release

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Article of JAEA R&D Review

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Determination of the Mass of a $$Xi$$ Hypernucleus; New Information to Understand the Structure of Neutron Stars [/]

Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:94.05

Category:Physics, Multidisciplinary

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