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Rotational Corrections to and Isovector Magnetic Moment of the Nucleon
The rotational corrections to the axial vector constant and the
isovector magnetic moment of the nucleon are studied in the Nambu --
Jona-Lasinio model. We follow a semiclassical quantization procedure in terms
of path integrals in which we can include perturbatively corrections in powers
of angular velocity . We find non-zero order
corrections from both the valence and the Dirac sea quarks. These corrections
are large enough to resolve the long-standing problem of a strong
underestimation of both and in the leading order. The axial
constant is well reproduced, whereas the isovector magnetic moment
is still underestimated by 25 \%.Comment: (Revtex), 10 pages (3 figures available on request), report
RUB-TPII-53/9