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Abstract
The masses of s-wave bottom baryons are discussed in a semirelativistic quark model, on the basis of a quark-distance relation. We stress that the Σ b is heavier than Ξ' b (b[su], b[sd]) containing the antisymmetric su(or sd) subsystem. We conclude that the two candidates for Λ b with very different masses are different states; Basile et al.'s result 5425 +175 −75 MeV is Λ b (b([du]), but Arenton et al.'s result ∼5750 MeV is Ξ' 0 b (b[su])
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