$\Lambda_b(6146)^0$ state newly observed by LHCb

We study the bottom Λb(6146)0 baryon, newly discovered by the LHCb Collaboration. By adopting an interpolating current of (Lρ,Lλ)=(0,2) type and D-wave nature with spin-parity quantum numbers JP=32+ for this heavy bottom baryon, we calculate its mass and residue. Using these spectroscopic parameters, we also investigate its dominant decays Λb(6146)0→Σbπ and Λb(6146)0→Σb*π and estimate the width of Λb(6146)0 obtained via these channels. The obtained mass, mΛb=(6144±68) MeV is in accord nicely with the experimental data. The width obtained via the dominant channels is also consistent with the experimental data of LHCb collaboration. We calculate the spectroscopic parameters and the same decay channels for the c-partner of Λb(6146)0 state, namely Λc(2860)+, as well. We compare the obtained results with the existing theoretical predictions as well as experimental data. The results indicate that the state Λb(6146)0 and its charmed-partner Λc(2860)+ can be considered as 1D-wave baryons with JP=32+.