Baryon self-energy due to the pion-quark interaction

We examine the baryon self-energy due to the pion-quark interaction, more specifically, how the self-energy varies among the ground states of the baryon octet and decuplet, and also from the ground to excited states. A nonrelativistic constituent quark model is used in which quarks are bound in a harmonic-oscillator potential. For the excited states we examine the lowest even- and odd-parity states in the nucleon sector. We find that the …