Odd parity bottom-flavored baryon resonances.

The LHCb Collaboration has recently observed two narrow baryon resonances with beauty. Their masses and decay modes look consistent with the quark model orbitally excited states Λb(5912) and Λb"(5920), with quantum numbers JP=½- and 3/2-, respectively. We predict the existence of these states within a unitarized meson-baryon coupled-channel dynamical model, which implements heavy-quark spin symmetry. Masses, quantum numbers and couplings of these resonances to the different meson-baryon channels are obtained. We find that the resonances Λb0(5912) and Λb0(5920) are heavy-quark spin symmetry partners, which naturally explains their approximate mass degeneracy. Corresponding bottom-strange baryon resonances are predicted at Ξb(6035.4) (JP=½-) and Ξb(6043.3) (JP=3/2-). The two ?b and two Ξb resonances complete a multiplet of the combined symmetry SU(3)-flavor times heavy-quark spin. [ABSTRACT FROM AUTHOR]