Book ; Online: Evidence of the Singly Cabibbo Suppressed decay $\Lambda_c^+\to p\pi^0$
2023
Abstract: Evidence for the singly Cabibbo suppressed decay $\Lambda_c^+\to p\pi^0$ is reported for the first ... at the BEPCII collider. The absolute branching fraction of $\Lambda_c^+\to p\pi^0$ is measured to be $(1.56^{+0 ... the ratio of the branching fractions of $\Lambda_c^+\to n\pi^+$ and $\Lambda_c^+\to p\pi^0$ is calculated ...
Abstract | Evidence for the singly Cabibbo suppressed decay $\Lambda_c^+\to p\pi^0$ is reported for the first time with a statistical significance of $3.7\sigma$ based on 6.0 $\mathrm{fb}^{-1}$ of $e^+e^-$ collision data collected at center-of-mass energies between 4.600 and 4.843 GeV with the BESIII detector at the BEPCII collider. The absolute branching fraction of $\Lambda_c^+\to p\pi^0$ is measured to be $(1.56^{+0.72}_{-0.58}\pm0.20)\times 10^{-4}$, which distinctly exceeds the upper limit measured by Belle experiment. Combining with the branching fraction of $\Lambda_c^+\to n\pi^+$, $(6.6\pm1.3)\times10^{-4}$, the ratio of the branching fractions of $\Lambda_c^+\to n\pi^+$ and $\Lambda_c^+\to p\pi^0$ is calculated to be $3.2^{+2.2}_{-1.2}$. As an important input for the theoretical models describing the decay mechanisms of charmed baryons, our result indicates that the non-factorizable contributions play an essential role and their interference with the factorizable contributions should not be significant. In addition, the absolute branching fraction of $\Lambda_c^+\to p\eta$ is measured to be $(1.63\pm0.31_{\rm stat}\pm0.11_{\rm syst}) \times10^{-3}$, which is consistent with previous measurements. Comment: 8 pages, 3 figures |
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Keywords | High Energy Physics - Experiment |
Subject code | 612 |
Publishing date | 2023-11-12 |
Publishing country | us |
Document type | Book ; Online |
Database | BASE - Bielefeld Academic Search Engine (life sciences selection) |
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