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Uncertainty induced by QCD coupling in the CTEQ global analysis of parton distributions
PHYSICAL REVIEW D, no. 5 (2010)
摘要
We examine the dependence of parton distribution functions (PDFs) on the value of the QCD coupling strength alpha(s)(M-Z). We explain a simple method that is rigorously valid in the quadratic approximation normally applied in PDF fitting, and fully reproduces the correlated dependence of theoretical cross sections on alpha(s) and PDF para...更多
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