Observations of the Cabibbo-Suppressed decays ${\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^0$, $n{\pi }^{+}{\pi }^{-}{\pi }^{+}$ and the Cabibbo-Favored decay ${\Lambda }_c^{+}\to n{K}^{-}{\pi }^{+}{\pi }^{+}$

Abstract

Using electron-positron annihilation data samples corresponding to an integrated luminosity of 4.5 ${\mathrm{fb}}^{-1}$, collected by the BESIII detector in the energy region between $4600$ MeV and $4699$ MeV, we report the first observations of the Cabibbo-suppressed decays ${\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^0$, ${\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^{-}{\pi }^{+}$, and the Cabibbo-favored decay ${\Lambda }_c^{+}\to n{K}^{-}{\pi }^{+}{\pi }^{+}$ with statistical significances of $7.9\sigma$, $7.8\sigma$, and $>10\sigma$, respectively. The branching fractions of these decays are measured to be $\mathcal{B}({\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^0)=(0.64\pm 0.09\pm 0.02)\%$, $\mathcal{B}({\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^{-}{\pi }^{+})=(0.45\pm 0.07\pm 0.03)\%$, and $\mathcal{B}({\Lambda }_c^{+}\to n{K}^{-}{\pi }^{+}{\pi }^{+})=(1.90\pm 0.08\pm 0.09)\%$, where the first uncertainties are statistical and the second are systematic. We find that the branching fraction of the decay ${\Lambda }_c^{+}\to n{\pi }^{+}{\pi }^0$ is about one order of magnitude higher than that of ${\Lambda }_c^{+}\to n{\pi }^{+}$.

References in corpus (31)

• Design and Construction of the BESIII Detector
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• Precision measurement of the integrated luminosity of the data taken by BESIII at center of mass energies between 3.810 GeV and 4.600 GeV
• Measurements of absolute hadronic branching fractions of ${\Lambda }_c^{+}$ baryon
• Test Flavor SU(3) symmetry in Exclusive ${\Lambda }_c$ decays
• Charmed Baryon Physics Circa 2021
• Measurement of the center-of-mass energies at BESIII via the di-muon process
• Anti-triplet charmed baryon decays with SU(3) Flavor Symmetry
• Charmed Baryon Weak Decays with SU(3) Flavor Symmetry
• Luminosities and energies of $e^{+}{e}^{-}$ collision data taken between $\sqrt{s}$=4.612 GeV and 4.946 GeV at BESIII
• Study of the Standard Model with weak decays of charmed hadrons at BESIII
• SU(3)_flavor analysis of two-body weak decays of charmed baryons
• Measurement of integrated luminosities at BESIII for data samples at center-of-mass energies between 4.0 and 4.6 GeV
• Analysis of Two-Body Decays of Charmed Baryons Using the Quark-Diagram Scheme
• Three-body charmed baryon Decays with SU(3) flavor symmetry
• A diagrammatic analysis of two-body charmed baryon decays with flavor symmetry
• SU(3) symmetry breaking in charmed baryon decays
• Observation of ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}$
• Evidence for the singly-Cabibbo-suppressed decay ${\Lambda }_c^{+}\to p\eta$ and search for ${\Lambda }_c^{+}\to p{\pi }^0$
• Search for the rare decay ${\Lambda }_c^{+}\to p{\mu }^{+}{\mu }^{-}$
• Charmed Baryon Weak Decays with Decuplet Baryon and SU(3) Flavor Symmetry
• Charm CPV: observation and prospects
• Charmed baryon decays in $SU(3{)}_F$ symmetry
• Measurements of Absolute Branching Fractions for ${\Lambda }_c^{+}\to {\Xi }^0{K}^{+}$ and $\Xi (1530{)}^0{K}^{+}$
• Measurements of the branching fractions of ${\Lambda }_c^{+}\to p\eta$ and ${\Lambda }_c^{+}\to p{\pi }^0$ decays at Belle
• Observation of the Singly Cabibbo-Suppressed Decay ${\Lambda }_c^{+}\to n{\pi }^{+}$
• An overview of ${\Lambda }_c$ decays
• Measurement of the absolute branching fractions of ${\Lambda }_c^{+}\to \Lambda \eta {\pi }^{+}$ and $\Sigma (1385{)}^{+}\eta$
• Evidence for the decays of ${\Lambda }_c^{+}\to {\Sigma }^{+}\eta$ and ${\Sigma }^{+}{\eta }^{\prime }$
• Measurement of the branching fraction of ${\Lambda }_c^{+}\to p\omega$ decay at Belle

Cited by in corpus (10)

• ${\Lambda }_c$ semileptonic decays
• First Measurement of the Decay Asymmetry in the pure W-boson-exchange Decay ${\Lambda }_c^{+}\to {\Xi }^0{K}^{+}$
• Observation of a rare beta decay of the charmed baryon with a Graph Neural Network
• Anatomy of ${\Lambda }_c^{+}$ semileptonic decays
• Topological amplitudes of charmed baryon decays in the $SU(3{)}_F$ limit
• Measurement of the absolute branching fraction of the inclusive decay ${\bar{\Lambda }}_c^{-}\to \bar{n}+X$
• Measurement of Branching Fractions for ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}$ and ${\Lambda }_c^{+}\to n{K}_S^0{K}^{+}$
• First observation of the decay ${\Lambda }_c^{+}\to n{K}_S^0{\pi }^{+}{\pi }^0$
• Baryons and baryoniums in the perspective of QCD sum rules
• Evidence for the semileptonic decays ${\Lambda }_c^{+}\to {\Sigma }^{\pm }{\pi }^{\mp }{e}^{+}{\nu }_e$