Constituent Quark Rest Energy and Wave Function Across the Light Cone

Abstract

It is shown that for a constituent quark in the intra-nucleon self-consistent field the spin-orbit interaction lowers the quark rest energy to values $\sim 100$ MeV, which agrees with the DIS momentum sum rule. The possibility of violation of the spectral condition for the light-cone momentum component of a bound quark is discussed.

Comments: 4 pages, 2 figures; Talk given at the XIII Workshop on High-Energy Spin Physics (DSPIN-09), Dubna, Sept. 1-5, 2009, to appear in the proceedings