TL;DR
This paper derives analytical expressions for non-singlet electron structure functions in QED up to the fifth order, enhancing understanding of their evolution and relation to exponentiated solutions.
Contribution
It provides new explicit analytical expressions for non-singlet splitting functions in QED up to fifth order, connecting iterative solutions with exponentiation methods.
Findings
Analytical expressions in fourth and fifth orders for non-singlet splitting functions.
Discussion of the relation between iterative and exponentiated solutions.
Enhanced understanding of QED evolution equations.
Abstract
Iterative solution of QED evolution equations for non-singlet electron structure functions is considered. Analytical expressions in the fourth and fifth orders are presented in terms of splitting functions. Relation to the existing exponentiated solution is discussed.
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