Twist-4 Matrix Elements of the Nucleon from Recent DIS Data at CERN and SLAC

We analyse the recent precision measurements of the lepton-hadron deep inelastic scattering at CERN and SLAC to extract model independent constraints among the nucleon matrix elements of the twist-4 operators. We also study a parameterization of these matrix elements and point out the possibility that the matrix elements of the quark-gluon mixed operator has a negative value of the order of $- (400 \pm 100\ {\rm MeV})^2$ at 5 GeV$^2$ renormalization scale.
Latex, 11 pages, 4 figures (available upon request), DOE/ER/40427-05-N93