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Target mass corrections in lepton–nucleus DIS : Theory and applications to nuclear PDFs (2024)

Ruiz, R., Muzakka, K. F., Léger, C., Risse, P., Accardi, A., Duwentäster, P., Hobbs, T. J., Ježo, T., Keppel, C., Klasen, M., Kovařík, K., Kusina, A., Morfín, J. G., Olness, F. I., Owens, J. F., Schienbein, I., & Yu, J. Y. (2024). Target mass corrections in lepton–nucleus DIS : Theory and applications to nuclear PDFs. Progress in Particle and Nuclear Physics, Early online, Article 104096. https://doi.org/10.1016/j.ppnp.2023.104096

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Publication details

All authors or editors: Ruiz, R.; Muzakka, K. F.; Léger, C.; Risse, P.; Accardi, A.; Duwentäster, P.; Hobbs, T. J.; Ježo, T.; Keppel, C.; Klasen, M.; et al.

Journal or series: Progress in Particle and Nuclear Physics

ISSN: 0146-6410

eISSN: 1873-2224

Publication year: 2024

Publication date: 10/01/2024

Volume: Early online

Article number: 104096

Publisher: Elsevier

Publication country: United Kingdom

Publication language: English

DOI: https://doi.org/10.1016/j.ppnp.2023.104096

Publication open access: Not open

Publication channel open access: 

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2301.07715

Abstract

Motivated by the wide range of kinematics covered by current and planned deep-inelastic scattering (DIS) facilities, we revisit the formalism, practical implementation, and numerical impact of target mass corrections (TMCs) for DIS on unpolarized nuclear targets. An important aspect is that we only use nuclear and later partonic degrees of freedom, carefully avoiding a picture of the nucleus in terms of nucleons. After establishing that formulae used for individual nucleon targets (𝑝, 𝑛), derived in the Operator Product Expansion (OPE) formalism, are indeed applicable to nuclear targets, we rewrite expressions for nuclear TMCs in terms of re-scaled (or averaged) kinematic variables. As a consequence, we find a representation for nuclear TMCs that is approximately independent of the nuclear target. We go on to construct a single-parameter fit for all nuclear targets that is in good numerical agreement with full computations of TMCs. We discuss in detail qualitative and quantitative differences between nuclear TMCs built in the OPE and the parton model formalisms, as well as give numerical predictions for current and future facilities.

Keywords: nuclear physics; particle physics; quarks; leptons

Free keywords: DIS; structure functions; target mass corrections; OPE; nuclear PDFs

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Preliminary JUFO rating: 3