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nNNPDF2.0: quark flavor separation in nuclei from LHC data

  • Regular Article - Theoretical Physics
  • Open access
  • Published: 28 September 2020
  • Volume 2020, article number 183, (2020)
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Journal of High Energy Physics Aims and scope Submit manuscript
nNNPDF2.0: quark flavor separation in nuclei from LHC data
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  • Rabah Abdul Khalek  ORCID: orcid.org/0000-0002-5489-73651,2,
  • Jacob J. Ethier1,2,
  • Juan Rojo  ORCID: orcid.org/0000-0003-4279-21921,2 &
  • …
  • Gijs van Weelden2 

  • 452 Accesses

  • 67 Citations

  • 1 Altmetric

  • Explore all metrics

A preprint version of the article is available at arXiv.

Abstract

We present a model-independent determination of the nuclear parton distribution functions (nPDFs) using machine learning methods and Monte Carlo techniques based on the NNPDF framework. The neutral-current deep-inelastic nuclear structure functions used in our previous analysis, nNNPDF1.0, are complemented by inclusive and charm-tagged cross-sections from charged-current scattering. Furthermore, we include all available measurements of W and Z leptonic rapidity distributions in proton-lead collisions from ATLAS and CMS at \( \sqrt{s} \) = 5.02 TeV and 8.16 TeV. The resulting nPDF determination, nNNPDF2.0, achieves a good description of all datasets. In addition to quantifying the nuclear modifications affecting individual quarks and antiquarks, we examine the implications for strangeness, assess the role that the momentum and valence sum rules play in nPDF extractions, and present predictions for representative phenomenological applications. Our results, made available via the LHAPDF library, highlight the potential of high-energy collider measurements to probe nuclear dynamics in a robust manner.

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Authors and Affiliations

  1. Department of Physics and Astronomy, VU Amsterdam, 1081HV, Amsterdam, The Netherlands

    Rabah Abdul Khalek, Jacob J. Ethier & Juan Rojo

  2. Nikhef Theory Group, Science Park 105, 1098 XG, Amsterdam, The Netherlands

    Rabah Abdul Khalek, Jacob J. Ethier, Juan Rojo & Gijs van Weelden

Authors
  1. Rabah Abdul Khalek
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  2. Jacob J. Ethier
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  3. Juan Rojo
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  4. Gijs van Weelden
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Correspondence to Jacob J. Ethier.

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ArXiv ePrint: 2006.14629

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Khalek, R.A., Ethier, J.J., Rojo, J. et al. nNNPDF2.0: quark flavor separation in nuclei from LHC data. J. High Energ. Phys. 2020, 183 (2020). https://doi.org/10.1007/JHEP09(2020)183

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  • Received: 03 July 2020

  • Accepted: 04 September 2020

  • Published: 28 September 2020

  • DOI: https://doi.org/10.1007/JHEP09(2020)183

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Keywords

  • Deep Inelastic Scattering (Phenomenology)
  • QCD Phenomenology
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