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Measurements of the branching fractions of $$Lambda_c^+ to p eta$$ and $$Lambda_c^+ to p pi^0$$ decays at Belle

Belleにおける$$Lambda_c^+ to p eta$$と$$Lambda_c^+ to p pi^0$$崩壊の分岐比の測定

Li, S. X.*; 谷田 聖   ; Belle Collaboration*; 他203名*

Li, S. X.*; Tanida, Kiyoshi; Belle Collaboration*; 203 of others*

We report measurements of the branching fractions of singly Cabibbo-suppressed decays $$Lambda_c^+ to p eta$$ and $$Lambda_c^+ to p pi^0$$ using the full Belle data sample corresponding to an integrated luminosity of 980.6 $$rm fb^{-1}$$. The data were collected by the Belle detector at the KEKB $$e^{+}$$$$e^{-}$$ asymmetric-energy collider. A clear $$Lambda_c^+$$ signal is seen in the invariant mass distribution of $$p eta$$. The signal yield of the $$Lambda_c^+ to p eta$$ process is $$7734 pm 263$$; from this, we measure the ratio of branching fractions $${cal B}(Lambda_c^+ to p eta)/{cal B}(Lambda_c^+ to p K^- pi^+) = (2.258 pm 0. 077(rm stat.) pm 0.136(rm syst.))times 10^{-2}$$, from which we infer the branching fraction $${cal B}(Lambda_c^+ to p eta) = (1.42 pm 0.05(rm stat.) pm 0.11(rm syst.)) times 10^{-3}$$. In addition, no significant signal for $$Lambda_c^+ to p pi^0$$ is found so an upper limit on the branching fraction of $${cal B}(Lambda_c^+ to p pi^0) < 8.0 times 10^{-5}$$ at 90% credibility level is set, more than three times better than the best current upper limit.

使用言語

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English

掲載資料名

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Physical Review D

巻

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103

号

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7

ページ数

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p.072004_1 - 072004_9

発行年月

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2021/04

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.103.072004

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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高エネルギー加速器研究機構

Access

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- Accesses

InCites™

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パーセンタイル：65.5

分野：Astronomy & Astrophysics

Altmetrics

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