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PineAPPL: NLO EW corrections for PDF processes

by Christopher Schwan

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Submission summary

Authors (as registered SciPost users): Christopher Schwan
Submission information
Preprint Link: https://arxiv.org/abs/2108.05816v1  (pdf)
Code repository: https://github.com/N3PDF/pineappl
Date accepted: 2022-03-04
Date submitted: 2021-08-13 06:26
Submitted by: Schwan, Christopher
Submitted to: SciPost Physics Proceedings
Proceedings issue: 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021)
Ontological classification
Academic field: Physics
Specialties:
  • High-Energy Physics - Phenomenology

Abstract

Modern parton distribution function (PDF) determinations either neglect higher-order corrections in the electroweak (EW) coupling or implement them approximately for a subset of PDF processes. We present a new tool, PineAPPL, which supports perturbative correction in arbitrary powers of the EW and strong coupling constant, and stores theoretical predictions independently of the used PDFs in so-called interpolation grids. These are the foundation of any PDF determination, and will allow us to perform a PDF fit taking into account EW corrections for all processes consistently. Apart from PDF determinations PineAPPL can also be used in precision phenomenology to study the impact of different choices of PDF sets, without rerunning the time-consuming computation. As an application of this tool we show Drell-Yan (DY) lepton-pair production were larger effects of NLO EW corrections can be seen that will potentially influence the PDF fit and comment about which observables are particularly suited and NLO EW PDF fit and which are not.

Published as SciPost Phys. Proc. 8, 079 (2022)


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