nCTEQ15HIX -- Extending nPDF Analyses into the High-$x$, Low $Q^2$ Region

Abstract

We use the nCTEQ analysis framework to investigate nuclear Parton Distribution Functions (nPDFs) in the region of large x and intermediate-to-low $Q$, with special attention to recent JLab Deep Inelastic Scattering data on nuclear targets. This data lies in a region which is often excluded by $W$ and $Q$ cuts in global nPDF analyses. As we relax these cuts, we enter a new kinematic region, which requires new phenomenology. In particular, we study the impact of i) target mass corrections, ii) higher twist corrections, iii) deuteron corrections, and iv) the shape of the nuclear PDF parametrization at large-$x$ close to one. Using the above tools, we produce a new nPDF set (named nCTEQ15HIX) which yields a good description of the new JLab data in this challenging kinematic region, and displays reduced uncertainties at large $x$, in particular for up and down quark flavors.

arXiv comment25 pages, 19 figures, 6 tables, 1 auxiliary data file. Version 02: include journal updates

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Cited by in corpus (18)

• Impact of heavy quark and quarkonium data on nuclear gluon PDFs
• Nuclear PDFs After the First Decade of LHC Data
• Reweighted nuclear PDFs using Heavy-Flavor Production Data at the LHC: nCTEQ15_rwHF & EPPS16_rwHF
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• Nuclear effects in neutrino-nucleus DIS and probe for short range correlation
• Parametrization of the nuclear structure function
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• Nuclear medium effects in lepton-nucleus DIS in the region of $x\gtrsim 1$
• The impact of future $D$- and $B$-meson measurements with the SMOG2 program at LHCb on the determination of nuclear parton distribution functions
• Hard processes in multi-TeV ion collisions
• Impact of inclusive hadron production data on nuclear gluon PDFs
• Multiprocess imaging of nuclear modifications on parton distributions in proton-nucleus collisions
• The Forward Physics Facility at the High-Luminosity LHC
• Experimental Study of Bremsstrahlung Gamma Ray Emission and Short-Range Correlations in ${}^{124}$Sn+${}^{124}$Sn Collisions at 25 MeV/u
• EPPS21: A global QCD analysis of nuclear PDFs