Volume 508 -
QCD at the Extremes
(QCDEX2025) -
Session: Parton Densities and TMDs at high scales, including Heavy Boson PDFs
Validation of the PB Framework in PYTHIA via Drell–Yan Production at NLO
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Pre-published on:
November 19, 2025
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Abstract
In this paper, we validate a novel method called PDF2ISR, which implements the initial-state shower approach of the Parton Branching framework within PYTHIA. The validation is performed by comparing Drell–Yan lepton-pair transverse-momentum distributions obtained with the standard Parton Branching initial-state shower approach and those generated using the PDF2ISR implementation in PYTHIA. The Drell–Yan pT spectrum, particularly at low pT, is highly sensitive to initial-state radiation, making it an ideal observable for this study. We find excellent agreement between the two approaches, confirming the successful implementation of the Parton Branching initial-state radiation method in PYTHIA.
DOI: https://doi.org/10.22323/1.508.0008
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.