Ground State Baryons in Covariant Level-Classification Scheme

Details Ground State Baryons in Covariant Level-Classification Scheme Ground State Baryons in Covariant Level-Classification Scheme

2003-08-29

arxiv.org/abs/hep-ph/0308310v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

proc.of Nihon univ. and KEK symposium, Tokyo, Feb 24-26, 2003. 7 pages uses ptptex.sty

Scientific paper

In the covariant level-classification scheme of hadrons based on U(12)SF * O(3,1)L symmetry, the ground state baryons and antibaryons are assigned to the (12 * 12 * 12)Sym = 364-multiplet in the spin-flavor U(12)SF symmetry. This multiplet includes, in addition to the ordinary 56-multiplet of the static SU(6)SF, the extra chiral 56' and 70-multiplets, called "chiralons," which are expected to exist with masses in 1 -- 2 GeV region. Their electro-magnetic properties, magnetic moments and radiative decay amplitudes, are investigated. A longstanding puzzle, that the predicted value of the width Gamma(Delta -> N gamma) by the conventional treatment is inconsistently small with the experimental one, may be solved by the mixing effect of 56-states with the chiral 56'-states.

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