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disorder: Deep inelastic scattering at high orders

Alexander Karlberg
Jan 2024
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摘要原文
We present a Fortran 77/95 code capable of computing QCD corrections in deep inelastic scattering (DIS). The code uses the Projection-to-Born method to combine an exclusive DIS + 1 jet calculation with the inclusive DIS structure functions, thereby obtaining fully differential DIS predictions at $\mathcal{O}(\alpha_{\mathrm{s}}^2)$. The code is lightweight and fast, and yet includes the most common functionalities found in typical perturbative QCD programs, like automatic renormalisation and factorisation scale uncertainties, options to run and combine multiple seeds, and interfaces to FastJet and LHAPDF. Due to the underlying exclusive DIS + 1 jet code, the program also provides stable results in the infrared, relevant for extracting logarithmic coefficients for analytic resummations. As a by-product the code provides access to the DIS structure functions and (reduced) cross sections up to $\mathcal{O}(\alpha_{\mathrm{s}}^3)$
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