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Transverse momentum dependent PDFs at N3LO

Author(s)
Ebert, Markus; Mistlberger, Bernhard; Vita, Gherardo
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Abstract
We compute the quark and gluon transverse momentum dependent parton distribution functions at next-to-next-to-next-to-leading order (N³LO) in perturbative QCD. Our calculation is based on an expansion of the differential Drell-Yan and gluon fusion Higgs production cross sections about their collinear limit. This method allows us to employ cutting edge multiloop techniques for the computation of cross sections to extract these universal building blocks of the collinear limit of QCD. The corresponding perturbative matching kernels for all channels are expressed in terms of simple harmonic polylogarithms up to weight five. As a byproduct, we confirm a previous computation of the soft function for transverse momentum factorization at N³LO. Our results are the last missing ingredient to extend the qT subtraction methods to N³LO and to obtain resummed qT spectra at N³LL′ accuracy both for gluon as well as for quark initiated processes.
Date issued
2020-09
URI
https://hdl.handle.net/1721.1/130078
Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics
Journal
Journal of High Energy Physics
Publisher
Springer Science and Business Media LLC
Citation
Ebert, Markus A. et al. "Transverse momentum dependent PDFs at N3LO." Journal of High Energy Physics 2020, 9 (September 2020): 146 © 2020 The Author(s)
Version: Final published version
ISSN
1029-8479

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