Contributions of operators of twist two and higher in large n moments of structure functions |
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Authors: | Moshe Moshe |
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Institution: | CERN, Geneva, Switzerland |
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Abstract: | Though high twist terms are becoming important as x→1, or equivalently, in large n moments, their detection in this regime in deep inelastic lepton scattering needs special caution. The high order terms in the twist two component are strongly dependent on n; one finds that at the perturbative expansion is invalid whereas higher twist terms are important at . Since grows very fast with n the necessary requirement for any deep inelastic phenomenological analysis, namely , cannot hold for too large moments. The scheme dependence of ak, αk and bk is also discussed. |
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