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Neutrino-Nucleon Cross-Section Model Tuning in GENIE v3

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arxiv 2104.09179 v2 pith:AVQYQFB2 submitted 2021-04-19 hep-ph hep-ex

GENIE Collaboration: Júlia Tena-Vidal , Costas Andreopoulos , Adi Ashkenazi , Christopher Barry , Steve Dennis , Steve Dytman , Hugh Gallagher , Steven Gardiner
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Walter Giele Robert Hatcher Or Hen Libo Jiang Igor D. Kakorin Konstantin S. Kuzmin Anselmo Meregaglia Vadim A. Naumov Afroditi Papadopoulou Gabriel Perdue Marco Roda Vladyslav Syrotenko Jeremy Wolcott
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We summarise the results of a study performed within the GENIE global analysis framework, revisiting the GENIE bare-nucleon cross-section tuning and, in particular, the tuning of a) the inclusive cross-section, b) the cross-section of low-multiplicity inelastic channels (single-pion and double-pion production), and c) the relative contributions of resonance and non-resonance processes to these final states. The same analysis was performed with several different comprehensive cross-section model sets available in GENIE Generator v3. In this work we performed a careful investigation of the observed tensions between exclusive and inclusive data, and installed analysis improvements to handle systematics in historic data. All tuned model configurations discussed in this paper are available through public releases of the GENIE Generator. With this paper we aim to support the consumers of these physics tunes by providing comprehensive summaries of our alternate model constructions, of the relevant datasets and their systematics, and of our tuning procedure and results.

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