Heavy quark mass effects in charged-current deep-inelastic scattering at approximate NNLO in the Aivazis-Collins-Olness-Tung scheme
Year: 2025
Type: article
Abstract: The approximate SACOT- χ scheme for heavy quark production in deep-inelastic scattering was initially formulated for the neutral current structure functions F 2 and F L . We extend this approach to the charged current case (also including F 3 ), and thereby complete the definitions for the most relevant inclusive structure functions. Furthermore, we implement these structure functions in the open-source code ++ which provides fast numerical evaluations over a wide kinematic range; this addition to the ++ code is publicly available, with details provided in the Appendix. This SACOT- χ implementation enables detailed numerical insights on the mass dependence of the structure functions and cross sections in the ( x , Q 2 ) -plane for both neutral and charged current processes. We consider kinematic regions relevant for the experimental measurements from fixed-target ν DIS experiments (NuTeV, CCFR, and Chorus) and HERA, and also projections for the upcoming EIC. In particular, the ν DIS experiments reveal a surprisingly strong dependence on the mass effects, offering valuable insights that may help resolve long-standing challenges in accurately describing these datasets.
DOI: 10.1103/hmlr-p7zb
Institutions: Southern Methodist University, University of Münster, Thomas Jefferson National Accelerator Facility, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, Université Paris-Saclay, Institut de Recherche sur les Lois Fondamentales de l'Univers, Institute of Nuclear Physics, Polish Academy of Sciences, Institut National de Physique Nucléaire et de Physique des Particules, Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble Alpes
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funders: National Science Foundation, U.S. Department of Energy, Aspen Center for Physics, Strong, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Narodowe Centrum Nauki, Westfälische Wilhelms-Universität Münster, Office of Science, Nuclear Physics, Thomas Jefferson National Accelerator Facility
Awards: G1170463422, G1728142190, G1848180026, G2263355576, G2595738051, G2702141073, G2877212259, RESEARCH AT THE ENERGY FRONTIER AT SOUTHERN METHODIST UNIVERSITY, G2988778103, Learning the 3D structure of the proton, G638484911, G6427981414, G6674091005, G7520763071, Programs on Critical Problems in Physics, Astrophysics and Biophysics at the Aspen Center for Physics, SFB 1225: Isolierte Quantensysteme und Universalität unter extremen Bedingungen (ISOQUANT)
OpenAlex ID: W4416890349