Structure function evolution at next-to-leading order and beyond
Abstract
Results are presented of two studies addressing the scaling violations of deep-inelastic structure functions. Factorization-scheme independent fits to all ep and mu p data on F2 are performed at next-to-leading order (NLO), yielding alphas(MZ) = 0.114 +- 0.002exp (+0.006-0.004)th . In order to reduce the theoretical error dominated by the renormalization-scale dependence, the next-higher order (NNLO) needs to be included. For the flavour non-singlet sector, it is shown that available calculations provide sufficient information for this purpose at x > 10-2.
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