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Improved Approximations for the Three-Loop Splitting Functions in QCD
High Energy Physics - Phenomenology · Submitted 31 Jul 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The inclusion of these constraints reduces the uncertainties of our approximations considerably and extends their region of applicability by about one order of magnitude to lower momentum fractions x .
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The abstract, sentence by sentence
We update our approximate parametrizations of the three-loop splitting functions for the evolution of unpolarized parton densities in perturbative QCD. The new information taken into account is given by the additional Mellin moments recently calculated by Retey and Vermaseren. The inclusion of these constraints reduces the uncertainties of our approximations considerably and extends their region of applicability by about one order of magnitude to lower momentum fractions x .
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We update our approximate parametrizations of the three-loop splitting functions for the evolution of unpolarized parton densities in perturbative QCD. | contribution 1.00 | 0.92 | 0.14 | asserted 0.98 |
| s1 | The new information taken into account is given by the additional Mellin moments recently calculated by Retey and Vermaseren. | method 0.89 | 0.08 | 0.05 | asserted 1.00 |
| s2 | The inclusion of these constraints reduces the uncertainties of our approximations considerably and extends their region of applicability by about one order of magnitude to lower momentum fractions x . | result 0.95 | 0.88 | 0.77 | asserted 1.00 |
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Original abstract
We update our approximate parametrizations of the three-loop splitting functions for the evolution of unpolarized parton densities in perturbative QCD. The new information taken into account is given by the additional Mellin moments recently calculated by Retey and Vermaseren. The inclusion of these constraints reduces the uncertainties of our approximations considerably and extends their region of applicability by about one order of magnitude to lower momentum fractions x .
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