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arXiv · 2307.08269

Fast evaluation of heavy-quark contributions to DIS in APFEL++

P. Risse·V. Bertone·T. Ježo·M. Klasen·K. Kovařík·F. I. Olness·I. Schienbein
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Abstract

Mass-dependent quark contributions are of great importance to DIS processes. The simplified-ACOT-scheme includes these effects over a wide range of momentum transfers up to next-to-leading order in QCD. In recent years an improvement in the case of neutral current DIS has been achieved by using zero-mass contributions up to next-to-next-to-leading order (NNLO) with massive phase-space constraints. In this work, we extend this approach to the case of charged current DIS and provide an implementation in the open-source code APFEL++. The increased precision will be valuable for ongoing and future neutrino programs, the Electron-Ion-Collider and the studies of partonic substructure of hadrons and nuclei. A highly efficient implementation using gridding techniques extends the applicability of the code to the determination of parton distribution functions (PDFs).

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P. Risse, V. Bertone, T. Ježo, M. Klasen, K. Kovařík, F. I. Olness, I. Schienbein. 2023-07-17. Fast evaluation of heavy-quark contributions to DIS in APFEL++. https://arxiv.org/abs/2307.08269

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