Calculations for deep inelastic scattering using fast interpolation grid techniques at NNLO in QCD and the extraction of $$\alpha _{\mathrm {s}}$$ αs from HERA data

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ID: 98554
2019
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Ranked #8 of 12 articles by views in european physical journal c: particles and fields

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Abstract
Abstract The 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 $$\alpha _{\mathrm {s}} (M_{{\mathrm {Z}}}) = 0.1170\,(15)_\text {exp}\,(25)_\text {th}$$ αs(MZ)=0.1170(15)exp(25)th is obtained using the HERA inclusive jet cross section data.
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britzger2019calculationseuropean Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Britzger, D.;Currie, J.;Ridder, A. Gehrmann-De;Gehrmann, T.;Glover, E. W. N.;Gwenlan, C.;Huss, A.;Morgan, T.;Niehues, J.;Pires, J.;Rabbertz, K.;Sutton, M. R.;
Journal european physical journal c: particles and fields
Year 2019
DOI
DOI not found
URL
http://link.springer.com/article/10.1140/epjc/s10052-019-7351-x
Keywords
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