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Measurements of the branching fractions of $$Xi_c^0 to Lambda K_S^0$$, $$Xi_c^0 to Sigma^0 K_S^0$$, and $$Xi_c^0 to Sigma^+ K^-$$ decays at Belle

Li, Y.*; 谷田 聖   ; Belle Collaboration*; 他213名*

Li, Y.*; Tanida, Kiyoshi; Belle Collaboration*; 213 of others*

Using the entire data sample of $$980mathrm{~fb}^{-1}$$ collected with the Belle detector at the KEKB asymmetric-energy $$e^+e^-$$ collider, we present measurements of the branching fractions of the Cabibbo-favored decays $$Xi_c^0 to Lambda K_S^0$$, $$Xi_c^0 to Sigma^0 K_S^0$$, and $$Xi_c^0 to Sigma^+ K^-$$. Taking the decay $$Xi_c^0 to Xi^- pi^+$$ as the normalization mode, we measure the branching fraction ratio $${cal B}(Xi_c^0 to Lambda K_S^0)/{cal B}(Xi_c^0 to Xi^- pi^+) = 0.229pm0.008pm0.012$$ with improved precision, and measure the branching fraction ratios $${cal B}(Xi_c^0 to Sigma^0 K_S^0)/{cal B}(Xi_c^0 to Xi^- pi^+) = 0.038pm0.006pm0.004$$ and $${cal B}(Xi_c^0 to Sigma^+ K^-)/{cal B}(Xi_c^0 to Xi^- pi^+) = 0.123pm0.007pm0.010$$ for the first time. Taking into account the branching fraction of the normalization mode, the absolute branching fractions are determined to be $${cal B}(Xi_c^0 to Lambda K_S^0) = (3.27pm0.11pm0.17pm0.73) times 10^{-3}$$, $${cal B}(Xi_c^0 to Sigma^0 K_S^0) = (0.54pm 0.09pm 0.06pm 0.12) times 10^{-3}$$, and $${cal B}(Xi_c^0 to Sigma^+ K^-) = (1.76pm 0.10pm0.14pm 0.39) times 10^{-3}$$. The first and second uncertainties above are statistical and systematic, respectively, while the third ones arise from the uncertainty of the branching fraction of $$Xi_c^0 to Xi^- pi^+$$.

発表言語

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English

掲載資料名

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Physical Review D

巻

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105

号

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1

ページ数

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p.L011102_1 - L011102_10

発行年月

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2022/01

発表会議名

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開催年月

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開催都市

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開催国

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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/10.1103/PhysRevD.105.L011102

研究データの公開先DOI

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本成果にかかわる研究データのリンクです。

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：52.57

分野：Astronomy & Astrophysics

Altmetrics

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