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Calculations for deep inelastic scattering using fast interpolation grid techniques at NNLO in QCD and the extraction of as from HERA data
journal contribution
posted on 2023-06-09, 19:28 authored by D Britzger, J Currie, A Gehrmann-De Ridder, E W N Glover, C Gwenlan, A Huss, T Morgan, J Niehues, J Pires, K Rabbertz, Mark SuttonMark SuttonThe extension of interpolation-grid frameworks for perturbative QCD calculations at next-to-next-to-leading order (NNLO) is presented for deep inelastic scattering (DIS) processes. A fast and flexible evaluation of higher-order predictions for any a posteriori choice of parton distribution functions (PDFs) or value of the strong coupling constant is essential in iterative fitting procedures to extract PDFs and Standard Model parameters as well as for a detailed study of the scale dependence. The APPLfast project, described here, provides a generic interface between the parton-level Monte Carlo program NNLOjet and both the APPLgrid and fastNLO libraries for the production of interpolation grids at NNLO accuracy. Details of the interface for DIS processes are presented together with the required interpolation grids at NNLO, which are made available. They cover numerous inclusive jet measurements by the H1 and ZEUS experiments at HERA. An extraction of the strong coupling constant is performed as an application of the use of such grids and a best-fit value of as(MZ)=0.1170(15)exp(25)th is obtained using the HERA inclusive jet cross section data.
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Publication status
- Published
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- Published version
Journal
European Physical Journal C: Particles and FieldsISSN
1434-6044Publisher
EDP SciencesExternal DOI
Issue
845Volume
79Page range
1-12Department affiliated with
- Physics and Astronomy Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-10-29First Open Access (FOA) Date
2019-10-29First Compliant Deposit (FCD) Date
2019-10-28Usage metrics
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