Abstract
We consider the longitudinal momentum distribution of hadrons inside jets in proton-proton collisions. At partonic threshold large double logarithmic corrections arise which need to be resummed to all orders. We develop a factorization formalism within SCET that allows for the joint resummation of threshold and jet radius logarithms. We achieve next-to-leading logarithmic NLL′ accuracy by including non-global logarithms in the leading-color approximation. Overall, we find that the threshold resummation leads to a sizable enhancement of the cross section and a reduced QCD scale dependence, suggesting that the all-order resummation can be important for the reliable extraction of fragmentation functions in global analyses when jet substructure data is included.
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Kaufmann, T., Liu, X., Mukherjee, A. et al. Hadron-in-jet production at partonic threshold. J. High Energ. Phys. 2020, 40 (2020). https://doi.org/10.1007/JHEP02(2020)040
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DOI: https://doi.org/10.1007/JHEP02(2020)040