Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-12-14
Physics
High Energy Physics
High Energy Physics - Phenomenology
Several typos corrected, one reference added
Scientific paper
In a recent paper Yang and Kim discuss the lowest baryon mass formulas using a chiral soliton model. However, contrary to their assertion, their result is not equivalent to a generalized Gell Mann-Okubo mass formula derived (G.Morpurgo 1992) using only general properties of QCD (The General parameterization method). The reason for the non equivalence is that the generalized mass formula include all the main terms that break flavor at second order, whereas the Authors above do not go beyond first order flavor breaking (and should therefore find the usual Gell Mann Okubo formula). That is is not so, due to some inconsistencies. Below we confine to the part of the Yang-Kim paper dealing with the mass formula. We will not consider the other items of their paper.
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