Dynamical suppression of the spin-orbit interaction in hadrons

Physics – High Energy Physics – High Energy Physics - Phenomenology

Scientific paper

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LaTeX2e, 6 pages, uses jetpl.cls, version to appear in JETP Lett

Scientific paper

10.1134/S0021364008150010

Spin-dependent interaction in hadrons is considered in the approach of the QCD string. The string moment of inertia, which ensures the correct (inverse) Regge slope 2*pi*sigma, is found to suppress the spin-orbit interaction. For light quarks and moderate angular momenta the suppression constitutes around 25% whereas for large angular momenta the spin-orbit interaction is suppressed by the factor L^(-2/5). For heavy quarks the effect manifests itself as a string correction for the spin-dependent potential.

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