Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 46: Theorie: QCD

T 46.10: Vortrag

Dienstag, 26. März 2019, 18:15–18:30, ST 8

Automated production and evaluation of interpolation grids for cross sections at next-to-next-to-leading order — Günter Quast, Klaus Rabbertz, and •Miguel Santos Correa — ETP, KIT Karlsruhe

The recent availability of calculations in perturbative QCD at next-to-next-to-leading order (NNLO) offers another significant increase in precision for comparisons between theory and experimental data e.g. from collisions at the LHC. To avoid repetitions of these CPU intensive computations for variations of input parameters, the interpolation grid technique as implemented in APPLgrid and fastNLO is used together with the original theory code in the form of the NNLOJET package. Up to now many manual steps are required for setup, quality checks, parallelised production on thousands of compute nodes, harvesting, and combination of subgrids to the final product.

We present as an example calculation the triple-differential Z+jet cross section, suitable for precision comparisons to LHC data, and demonstrate the implementation of an automated pipeline based on the software packages Luigi and LAW for the creation of such high precision interpolation grids at NNLO.