A New Interpretation of the Observed Heavy Baryons

Abstract

I suggest that the conventional assignment of quantum numbers to the observed charm and bottom baryons is not correct, as these assignments imply large violation of the heavy spin-flavor and light $SU(3)$ symmetries. I propose an alternative interpretation of the observed states, in which the symmetries are preserved. If these novel assignments are right, there is a new state with mass approximately 2380~MeV which decays to ${\Lambda }_c+\gamma$, and another with mass approximately 5760~MeV which decays to ${\Lambda }_b+\gamma$. Although such states have not been seen, neither are they excluded by current analyses.

REVTeX, 7 pages. This is the final version to appear in Physical Review Letters. Two typos in Eq. (1) have been fixed and several points elsewhere have been clarified; also, there is now a brief discussion of the relationship of this proposal to the nonrelativistic constituent quark model

References in corpus (2)

• Excited Heavy Mesons Beyond Leading Order in the Heavy Quark Expansion
• Charmed Baryon Masses in Chiral Perturbation Theory

Cited by in corpus (11)

• Heavy Baryons in a Quark Model
• A review of the open charm and open bottom systems
• Observation of Two Narrow States Decaying into ${\Xi }_c^{+}\gamma$ and ${\Xi }_c^0\gamma$
• Phenomenology of New Baryons with Charm and Strangeness
• Hyperfine Interactions in Charm and Bottom Systems
• Heavy Baryon Mixing in Chiral Perturbation Theory
• Heavy Baryons in SU(2) $\times$ SU(6)
• Baryons in the Field Correlator Method: Effects of the Running Strong Coupling
• Spin dependence of the masses of heavy baryons
• Heavy Baryon Masses in Large N_c HQET
• Charm Physics 1996 - A Retrospective