Chiral symmetry: Pion-nucleon interactions in constituent quark models

Journal Article · Thu May 01 00:00:00 EDT 1997 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.55.2675· OSTI ID:496889

Maekawa, C M; Robilotta, M R ^[1]

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1. Instituto de Fisica, Universidade de Sao Paulo, Caixa Postal 66318, Sao Paulo, SP (Brazil)

We study the interactions of an elementary pion with a nucleon made of constituent quarks and show that the enforcement of chiral symmetry requires the use of a two-body operator, whose form does not depend on the choice of the pion-quark coupling. The coordinate space NN effective potential in the pion exchange channel is given as a sum of terms involving two gradients, which operate on both the usual Yukawa function and the confining potential. We also consider an application to the case of quarks bound by a harmonic potential and show that corrections due to the symmetry are important. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 496889
• Journal Information: Physical Review, C, Vol. 55, Issue 5; Other Information: PBD: May 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
PION-NUCLEON INTERACTIONS
CHIRAL SYMMETRY
QUARK MODEL
BAG MODEL
CONFINEMENT
HARMONIC POTENTIAL
FORM FACTORS
PERTURBATION THEORY