Mass formula for strange baryons in large $N_c$ QCD versus quark model

Details Mass formula for strange baryons in large $N_c$ QCD versus quark model Mass formula for strange baryons in large $N_c$ QCD versus quark model

2007-08-24

arxiv.org/abs/0708.3291v1

Phys.Rev.D76:116005,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 figures

Scientific paper

10.1103/PhysRevD.76.116005

A previous work establishing a connection between a quark model, with relativistic kinematics and a $Y$-confinement plus one gluon exchange, and the $1/N_c$ expansion mass formula is extended to strange baryons. Both methods predict values for the SU(3)-breaking mass terms which are in good agreement with each other. Strange and nonstrange baryons are shown to exhibit Regge trajectories with an equal slope, but with an intercept depending on the strangeness. Both approaches agree on the value of the slope and of the intercept and on the existence of a single good quantum number labeling the baryons within a given Regge trajectory.

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