Jul 15 – 19, 2019
US/Eastern timezone

Application of the APPLfast grid interface to NNLOJET and determination of alpha_s(M_Z) at NNLO from DIS jet cross sections

Jul 15, 2019, 5:20 PM
2220 A Chair : Paolo Gunnellini

2220 A Chair : Paolo Gunnellini

PDFs/alpha_S/Soft PDFs/Soft/Alpha_S I


Klaus Rabbertz (ETP, KIT, Karlsruhe, Germany)


The technique of interpolation grids as implemented in the APPLgrid or fastNLO packages provides a fast and flexible way to reproduce the results of perturbative QCD cross section calculations with any input PDF, choice of scales, or strong coupling constant. Recent developments in the APPLfast interface between the NNLOJET QCD calculation with both packages are reported. As an example results using precision interpolation grids for a number of jet production processes at HERA are presented and the strong coupling constant, alphas(MZ), is determined at next-to-next-to-leading order QCD from inclusive jet cross section data in electron-proton collisions. The required NNLO interpolation grids shall be made publically available via the ploughshare utility that is discussed as a standard source for the distribution of such grids. Development versions of grids for QCD cross sections at the LHC including jet production and Z production at high pT are available as well.

Primary author

Klaus Rabbertz (ETP, KIT, Karlsruhe, Germany)


Mr Alexander Huss (University of Freiburg) Claire Gwenlan (Oxford) Daniel Britzger (MPI Physik, Munich, Germany) Mark Sutton (University of Sussex, UK)

Presentation materials