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PreprintCC BY 4.0HAL

Resummation-scale uncertainties in PDF determinations

  • Hamed Abdolmaleki
  • Valerio Bertone
  • Giuseppe Bozzi
  • Francesco Giuli
  • Alexander Glazov
  • Valentina Guglielmi
  • Francesco Hautmann
  • Fred Olness
  • Pavel Starovoitov
  • Oleksandr Zenaiev
Open at sourcePDFDOICite

Abstract

We investigate the impact of resummation-scale variations on parton distribution function (PDF) determinations. These variations introduce an additional source of theoretical uncertainty related to the evolution of PDFs and strong coupling αs that has never previously been accounted for in PDF fits. Using the open-source xFitter framework, we quantify this uncertainty in fits to HERA deep-inelastic scattering data and examine its implications for predictions of top-quark pair production at the LHC. We show that the resulting resummation-scale uncertainties have a sizable impact on LHC observables, highlighting the importance of including this source of uncertainty in precision QCD analyses.

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Cite

BibTeXRIS
BibTeX
@misc{abdolmaleki2026resummationscale,
  title = {{Resummation-scale uncertainties in PDF determinations}},
  author = {Hamed Abdolmaleki and Valerio Bertone and Giuseppe Bozzi and Francesco Giuli and Alexander Glazov and Valentina Guglielmi and Francesco Hautmann and Fred Olness and Pavel Starovoitov and Oleksandr Zenaiev},
  howpublished = {HAL},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.35344},
  eprint = {2609.35344},
  archivePrefix = {arXiv},
  url = {https://hal.science/hal-05784506v1},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Resummation-scale uncertainties in PDF determinations
AU  - Hamed Abdolmaleki
AU  - Valerio Bertone
AU  - Giuseppe Bozzi
AU  - Francesco Giuli
AU  - Alexander Glazov
AU  - Valentina Guglielmi
AU  - Francesco Hautmann
AU  - Fred Olness
AU  - Pavel Starovoitov
AU  - Oleksandr Zenaiev
PY  - 2026
DA  - 2026/09/28
PB  - HAL
DO  - 10.48550/arxiv.2609.35344
UR  - https://hal.science/hal-05784506v1
AB  - We investigate the impact of resummation-scale variations on parton distribution function (PDF) determinations. These variations introduce an additional source of theoretical uncertainty related to the evolution of PDFs and strong coupling α_s that has never previously been accounted for in PDF fits. Using the open-source xFitter framework, we quantify this uncertainty in fits to HERA deep-inelastic scattering data and examine its implications for predictions of top-quark pair production at the LHC. We show that the resulting resummation-scale uncertainties have a sizable impact on LHC observables, highlighting the importance of including this source of uncertainty in precision QCD analyses.
ER  -