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What makes the peak structure of the $$Lambda p$$ invariant-mass spectrum in the $$K^{-3} rm He rightarrow Lambda$$$$pn$$ reaction?

何が$$K^{-3}rm HerightarrowLambda$$$$pn$$反応の$$Lambda p$$不変質量スペクトルにピーク構造をもたらすのか?

関原 隆泰; Oset, E.*; Ramos, A.*

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

In this contribution we theoretically investigate what is the origin of the peak structure observed in the E15 experiment at J-PARC. Since the peak exists near the $$K^{-}pp$$ threshold, we expect two scenarios to produce the peak. One is that the $$Lambda (1405)$$ is generated but it does not correlate with $$p$$, and the uncorrelated $$Lambda (1405)$$-$$p$$ system subsequently decays into $$Lambda p$$. The other is that the $$bar{K} N N$$ quasi-bound state is indeed generated and decays into $$Lambda p$$. We calculate the $$Lambda p$$ invariant mass spectrum of the reaction with these two scenarios and compare it with the experimental one to interpret the experimental peak structure.

使用言語

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English

掲載資料名

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Acta Physica Polonica B

巻

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48

号

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10

ページ数

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p.1869 - 1874

発行年月

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2017/10

発表会議名

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2nd Jagiellonian Symposium on Fundamental and Applied Subatomic Physics

開催年月

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2017/06

開催都市

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Krak$'o$w

開催国

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Poland

キーワード

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no keyword

特許データ

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PDF

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論文URL

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https://doi.org/10.5506/APhysPolB.48.1869

研究データの公開先DOI

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使用施設

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広報プレスリリース

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論文解説記事
(成果普及情報誌)

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受委託・共同研究相手機関

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Access

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- Accesses

InCites™

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パーセンタイル：12.03

分野：Physics, Multidisciplinary

Altmetrics

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