$Lambda_cSigma_cpi$ coupling and $Sigma_c rightarrowLambda_c pi$ decay in lattice QCD

We evaluate the $Lambda_cSigma_cpi$ coupling constant ($G_{Lambda_c Sigma_c pi}$) and the width of the strong decay $Sigma_c rightarrowLambda_c pi$ in 2+1 flavor lattice QCD on four different ensembles with pion masses ranging from 700 MeV to 300 MeV. We find $G_{Lambda_c Sigma_c pi}=18.332(1.476)_{rm{stat.}}(2.171)_{rm{syst.}}$ and the decay width $Gamma(Sigma_c rightarrowLambda_c pi)=1.65(28)_{rm{stat.}}(30)_{rm{syst.}}$~MeV on the physical quark-mass point, which is in agreement with the recent experimental determination.