4 research outputs found

    Contribution of Quark-Mass-Dependent Operators to Higher Twist Effects in DIS

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    We look at the contribution of Quark-Mass-dependent twist-4 operators to the second moments of spin averaged structure functions and the Bjorken sum rule. Its contribution is non-negligible in the former case due to large Wilson coefficients. We also discuss the values of the twist- 4 spin-2 nucleon matrix element within present experimental constraints.Comment: 14pages, RevTex, (To be published in Phys. Rev. D) University of Washington preprint DOE/ER/40427-22-N9

    High energy collisions and nonperturbative QCD

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    La catalyse négative en phase liquide et éventuellement solide

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