SU(3) Mass Splittings for $\bar{q}q$ Mesons and $qqq$ Baryons

Details SU(3) Mass Splittings for $\bar{q}q$ Mesons and $qqq$ Baryons SU(3) Mass Splittings for $\bar{q}q$ Mesons and $qqq$ Baryons

2003-06-30

arxiv.org/abs/hep-ph/0307003v1

AIPConf.Proc.688:183-190,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 Pages, AIP Proc. Style; Contribution to the High-Energy Physics Workshop "Scalar Mesons: an Interesting Puzzle for QCD", May

Scientific paper

10.1063/1.1632205

By comparing SU(3)-breaking scales of linear mass formulae, it is shown that the lowest vector, axial-vector, and scalar mesons all have a $\bar{q}q$ configuration, while the ground-state octet and decuplet baryons are $qqq$. Also, the quark-level linear $\sigma$ model is employed to predict similar $\bar{q}q$ and $qqq$ states. Finally, the approximate mass degeneracy of the scalar $a_0$(980) and $f_0$(980) mesons is demonstrated to be accidental.

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