We compute the masses of the ground state baryons and their spin excited states discussing quark wave functions in baryons. Doubly charmed baryon masses are given in the expected accuracy of Ϯ10 MeV.

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Baryon masses are computed in a semirelativistic quark model. We determine quark distances in baryons on the basis of solutions of three-body harmonic oscillators and modifying them by forces due to the Fermi-Breit terms. We reproduce all the well-known s-wave baryon masses within i 9 -MeV accuracy. We conclude that the csu state of 2465.4t4.0f 1.5 MeV is ELf with the antisymmetric su flavor state and the csd state of 2471+3+4 MeV is EL' with the antisymmetric sd flavor state. To confirm these, it is important to find another csu baryon 2 f near 2580 MeV and another csd baryon 29 near 2579 MeV, which may decay to 2:+ ++and 2i0+y, respectively. We also give other charmed baryon masses.

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