Current algebra and the cloudy-bag model
Date
1986
Authors
Morgan, M.A.
Miller, G.A.
Thomas, A.W.
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Journal article
Citation
Physical Review D: Particles, Fields, Gravitation and Cosmology, 1986; 33(3):817-829
Statement of Responsibility
M. A. Morgan, G. A. Miller, and A. W. Thomas
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Abstract
Two versions of the cloudy-bag model (surface and volume coupling) satisfy the commutation relations of current algebra. Perturbation-theory evaluations of various observables are compared for the two treatments. The electromagnetic properties are essentially the same in both versions. The volume-coupling model contains, in lowest order, a pion-quark contact interaction that contributes to the axial-vector current. Including the effect of this term leads to a computed value of gA of about 1.25, if the radius of the nucleon bag is around 1.0 fm.
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© 1986 The American Physical Society