Unpolarized QED parton distribution functions in NLO
Abstract
Perturbative solutions for unpolarized QED parton distribution and fragmentation functions are presented explicitly in the next-to-leading logarithmic approximation. The scheme of iterative solution of QED evolution equations is described in detail. Terms up to O(α3L2) are calculated analytically, where L=(μF2/me2) is the large logarithm which depends on the factorization energy scale μF me. The results are process independent and relevant for future high-precision experiments.
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