Two-Pion Exchange Interaction Between Constituent Quarks

Abstract

The two-pion exchange interaction between constituent quarks is shown to enhance the effect of the the isospin dependent spin-spin component of the one-pion exchange interaction, and to cancel out its tensor component. It therefore provides a partial explanation for the phenomenological observation that the hyperfine interaction between constituent quarks is well described by a flavor dependent spin-spin interaction, which is attractive at short and repulsive at long range. The spin-orbit component of the two-pion exchange interaction is stronger than and has the opposite sign from that associated with the linear confining interaction in the $P-$shell multiplets.

Revised accepted version

References in corpus (3)

• S_3 and the L=1 Baryons in the Quark Model and the Chiral Quark Model
• The Confining Interaction and Radiative Decays of Heavy Quarkonia
• The $\pi -$Gluon Exchange Interaction Between Constituent Quarks

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