Symmetry breaking and quark-hadron duality in structure functions

Details Symmetry breaking and quark-hadron duality in structure functions Symmetry breaking and quark-hadron duality in structure functions

2003-02-03

arxiv.org/abs/hep-ph/0302013v2

Phys.Rev.C68:035210,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 9 figures, to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.68.035210

We identify conditions under which a summation over nucleon resonances can yield, via quark-hadron duality, parton model results for electromagnetic and neutrino structure functions at large x. While a summation over the lowest even and odd parity multiplets is sufficient to achieve duality in the symmetric quark model, a suppression of transitions to specific final states is required for more realistic cases incorporating SU(6) breaking. We outline several scenarios consistent with duality, discuss their implications for the high Q^2 behavior of transition form factors, and illustrate how they can expose the patterns in the flavor-spin dependence of inter-quark forces.

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