2025-04-25 11:03 |
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2025-04-25 10:51 |
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2025-04-24 14:16 |
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2025-04-24 14:10 |
[PUBDB-2025-01472]
Preprint
Adachi, I. ; Ahn, J. K. ; Ahn, Y. ; et al
Measurements of the branching fractions of $\Xi_{c}^{+}\to \Sigma^{+}K_{S}^{0}$, $\Xi_{c}^{+}\to \Xi^{0}\pi^{+}$, and $\Xi_{c}^{+}\to \Xi^{0}K^{+}$ at Belle and Belle II
[Belle II Preprint 2025-005; KEK Preprint 2025-2; arXiv:2503.17643]
Using 983.0 $\rm{fb}^{-1}$ and 427.9 $\rm{fb}^{-1}$ data samples collected with the Belle and Belle II detectors at the KEKB and SuperKEKB asymmetric energy $e^+e^-$ colliders, respectively, we present studies of the Cabibbo-favored $\Xi_c^+$ decays ${\Xi_{c}^{+}\to \Sigma^{+}K_{S}^{0}}$ and $\Xi_{c}^{+}\to \Xi^{0}\pi^{+}$, and the singly Cabibbo-suppressed decay $\Xi_{c}^{+}\to \Xi^{0}K^{+}$. The ratios of branching fractions of ${\Xi_{c}^{+}\to \Sigma^{+}K_{S}^{0}}$ and $\Xi_{c}^{+}\to \Xi^{0}K^{+}$ relative to that of $\Xi_{c}^{+}\to\Xi^{-}\pi^{+}\pi^{+}$ are measured for the first time, while the ratio ${\cal B}(\Xi_{c}^{+}\to\Xi^{0}\pi^{+})/{\cal B}(\Xi_{c}^{+}\to\Xi^{-}\pi^{+}\pi^{+}) $ is also determined and improved by an order of magnitude in precision. [...]
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2025-04-24 14:08 |
[PUBDB-2025-01470]
Preprint
Adachi, I. ; Aggarwal, L. ; Ahmed, H. ; et al
Measurement of the Branching Fraction of $\Lambda_c^+ \to p K_S^0 \pi^0$ at Belle
[Belle II Preprint: 2024-022; KEK preprint: 2024-20; arXiv:2503.04371]
We report a precise measurement of the ratio of branching fractions $\mathcal{B}(\Lambda_c^+\to p K_S^0 \pi^0)/\mathcal{B}(\Lambda_c^+\to p K^- \pi^+)$ using 980 fb$^{-1}$ of $e^+e^-$ data from the Belle experiment. We obtain a value of $\mathcal{B}(\Lambda_c^+\to p K_S^0 \pi^0)/\mathcal{B}(\Lambda_c^+\to p K^- \pi^+)=0.339\pm 0.002\pm 0.009$, where the first and second uncertainties are statistical and systematic, respectively. [...]
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2025-04-23 13:45 |
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2025-04-23 10:56 |
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2025-04-22 12:37 |
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2025-04-14 14:44 |
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