Observed supersymmetry and parity doubling of excited harbons from a simple spectrum generating algebra
- Instituto de Fisica Teorica, San paulo (Brazil)
- ICTP, Trieste (Italy)
The authors find remarkable agreement with the observed excitations of hadrons with a simple three parameter mass relation of the SU(3) subgroup of the underlying U(15/30) graded Lie group. The baryons are the appropriate supersymmetric partners of the mesons. An interesting feature, which is a focus of current interest, is that the baryons and isobars show parity doubling. Significantly, the ground state baryons and mesons have no place in the fit, so that the parity doubling is indicated only when excitation energy is available. This has correspondence with the parity doubling seen in recent lattice calculations, when thermal excitation is present. The agreement with experiment is comparable to the semi-relativistic quark model which fits with many force parameters and where the observed parity doubling is accidental. The gross splitting of the levels is the same for the strange and the non-strange sectors, suggesting flavour independence.
- OSTI ID:
- 274299
- Journal Information:
- Hadronic Journal, Vol. 16, Issue 6; Other Information: PBD: Dec 1993
- Country of Publication:
- United States
- Language:
- English
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