A new tool for fast-flying PDF fits

Acknowledgements: We thank Gaia Fontana (@qftoons) for designing the Colibri logo. We thank Ella Cole, Francesco Merlotti, Elie Hammou, Manuel Moreales Alvarado, David Yallup and the members of the NNPDF collaboration for insightful discussions. We are indebted to Juan Cruz Martinez for his help with the NNPDF code, and Zahari Kassabov for his contributions during the earliest stages of the project. Mark N. Costantini and Maria Ubiali are supported by the European Research Council under the European Union’s Horizon 2020 research and innovation Programme (Grant agreement no. 950246), and partially by the STFC consolidated Grant ST/X000664/1. LM acknowledges support from the European Union under the MSCA fellowship (Grant agreement no. 101149078) Advancing global SMEFT fits in the LHC precision era (EFT4ward). J. M. M. is supported by the donation of Christina and Peter Dawson to Lucy Cavendish College. Valentina Schütze Sánchez is supported by the Newnham Scholarship for Women in Theoretical Physics.