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Title Target mass corrections in lepton-nucleus DIS: theory and applications to nuclear PDFs
Authors R. Ruiz, K. Muzakka, C. Leger, Peter Risse, Alberto Accardi, P. Duwentäster, T. Hobbs, T. Ježo, Cynthia Keppel, M. Klasen, K. Kovarík, Aleksander Kusina, J. G. Morfín, Fredrick Olness, Joseph Owens, I. Schienbein, J.Y. Yu
JLAB number JLAB-THY-23-3748
LANL number arXiv:2301.07715
Other number DOE/OR/23177-5698
Document Type(s) (Journal Article) 
Associated with EIC: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)

Compiled for Progress in Particle and Nuclear Physics
Page(s) 104096
Publication 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.
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