Abstract
Double parton distributions can be computed from the perturbative splitting of one parton into two if the distance between the two observed partons is small. We develop schemes to take into account quark mass effects in this computation, and we study these schemes numerically at leading order in the strong coupling. Furthermore, we investigate in detail the structure of the next-to-leading order corrections to the splitting kernels that include quark mass effects.
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Acknowledgments
This work is in part supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) — grant number 409651613 (Research Unit FOR 2926) and grant number 491245950. The work of RN is supported by the ERC Starting Grant REINVENT-714788. The Feynman graphs in this manuscript were produced with JaxoDraw [71, 72]. The numerical studies have been performed using the ChiliPDF library [56, 57], which is under development. We gratefully acknowledge the contributions of our collaborators Florian Fabry, Oskar Grocholski, Mees van Kampen, and Frank Tackmann to this project.
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Diehl, M., Nagar, R. & Plößl, P. Quark mass effects in double parton distributions. J. High Energ. Phys. 2023, 100 (2023). https://doi.org/10.1007/JHEP09(2023)100
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DOI: https://doi.org/10.1007/JHEP09(2023)100