CHARMED BARYONS
($\mathit C$ = $+1$)
${{\mathit \Lambda}_{{{c}}}^{+}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit c}}$, ${{\mathit \Sigma}_{{{c}}}^{++}}$ = ${{\mathit u}}{{\mathit u}}{{\mathit c}}$, ${{\mathit \Sigma}_{{{c}}}^{+}}$ = ${{\mathit u}}{{\mathit d}}{{\mathit c}}$, ${{\mathit \Sigma}_{{{c}}}^{0}}$ = ${{\mathit d}}{{\mathit d}}{{\mathit c}}$,
${{\mathit \Xi}_{{{c}}}^{+}}$ = ${{\mathit u}}{{\mathit s}}{{\mathit c}}$, ${{\mathit \Xi}_{{{c}}}^{0}}$ = ${{\mathit d}}{{\mathit s}}{{\mathit c}}$, ${{\mathit \Omega}_{{{c}}}^{0}}$ = ${{\mathit s}}{{\mathit s}}{{\mathit c}}$ 		INSPIRE   JSON PDGID:
S033

${{\mathit \Lambda}_{{{c}}}^{+}}$

$I(J^P)$ = $0(1/2^{+})$ 
The parity of the ${{\mathit \Lambda}_{{{c}}}^{+}}$ is defined to be positive (as are the parities of the proton, neutron, and ${{\mathit \Lambda}}$). The quark content is ${{\mathit u}}{{\mathit d}}{{\mathit c}}$. Results of an analysis of ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ decays (JEZABEK 1992) are consistent with $\mathit J = 1/2$. ABLIKIM 2021N determines the ${{\mathit \Lambda}_{{{c}}}^{+}}$ spin to be $\mathit J = 1/2$, from an angular analysis of various 2-body ${{\mathit \Lambda}_{{{c}}}^{+}}$ decays in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Lambda}_{{{c}}}^{+}}{{\overline{\mathit \Lambda}}_{{{c}}}^{-}}$. We have omitted some results that have been superseded by later experiments. The omitted results may be found in earlier editions.
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${{\mathit \Lambda}_{{{c}}}^{+}}$ MASS $2286.46$ $\pm0.14$ MeV 
 
${{\mathit \Lambda}_{{{c}}}^{+}}$ MEAN LIFE ($2.026$ $\pm0.010$) $ \times 10^{-13}$ s 
 
▸  ${{\mathit \Lambda}_{{{c}}}^{+}}$ DECAY PARAMETERS
▸  ${{\mathit \Lambda}_{{{c}}}^{+}}$ , ${{\overline{\mathit \Lambda}}_{{{c}}}^{-}}$ $\mathit CP$-VIOLATING DECAY ASYMMETRIES
Branching fractions marked with a footnote, e.g. $\lbrack{}\mathit a$], have been corrected for decay modes not observed in the experiments. For example, the submode fraction ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\overline{\mathit K}}^{*}{(892)}^{0}}$ seen in ${{\mathit \Lambda}_{{{c}}}^{+}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$ has been multiplied up to include ${{\overline{\mathit K}}^{*}{(892)}^{0}}$ $\rightarrow$ ${{\overline{\mathit K}}^{0}}{{\mathit \pi}^{0}}$ decays.
Mode  
Fraction ($\Gamma_i$ / $\Gamma$) Scale Factor/
Conf. Level		 P(MeV/c)  
▸  Hadronic modes with a ${{\mathit p}}$ or ${{\mathit n}}$: $\mathit S$ = $-1$ final states
▸  Hadronic modes with a ${{\mathit p}}$ or ${{\mathit n}}$: $\mathit S$ = $0$ final states
▸  Hadronic modes with a hyperon: $\mathit S$ = $-1$ final states
▸  Hadronic modes with a hyperon: $\mathit S$ = $0$ final states
▸  Doubly Cabibbo-suppressed modes
▸  Semileptonic modes
▸  Inclusive modes
▸  $\Delta \mathit C$ = 1 weak neutral current ($\mathit C1$) modes, or Lepton Family number ($\mathit LF$), or Lepton number ($\mathit L$), or Baryon number ($\mathit B$) violating modes
▸  Radiative modes
▸  Exotic modes
[1] This branching fraction includes all the decay modes of the final-state resonance.
[2] Here ${{\mathit \gamma}_{{{D}}}}$ stands for a dark photon.
Constrained Fit information