Refine
Year of publication
Language
- English (360)
Has Fulltext
- yes (360)
Is part of the Bibliography
- no (360)
Keywords
- BESIII (19)
- e +-e − Experiments (14)
- Branching fraction (11)
- Particle and Resonance Production (7)
- Charm Physics (6)
- Hadronic decays (5)
- Quarkonium (5)
- Spectroscopy (5)
- Branching fractions (4)
- Charmonium (4)
Institute
- Physik (360) (remove)
Evidence for the singly Cabibbo suppressed decay Λ+c→pπ0 is reported for the first time with a statistical significance of 3.7σ based on 6.0 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 Λ+c→pπ0 is measured to be (1.56+0.72−0.58±0.20)×10−4, which distinctly exceeds the upper limit measured by Belle experiment. Combining with the branching fraction of Λ+c→nπ+, (6.6±1.3)×10−4, the ratio of the branching fractions of Λ+c→nπ+ and Λ+c→pπ0 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 Λ+c→pη is measured to be (1.63±0.31stat±0.11syst)×10−3, which is consistent with previous measurements.