Regular Article - Theoretical Physics
NNLO zero-jettiness beam and soft functions to higher orders in the dimensional-regularization parameter
Institut für Theoretische Teilchenphysik (TTP), KIT, 76128, Karlsruhe, Germany
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Accepted: 11 May 2020
Published online: 11 June 2020
We present the calculation of the next-to-next-to-leading order (NNLO) zero-jettiness beam and soft functions, up to the second order in the expansion in the dimensional regularization parameter . These higher order terms are needed for the computation of the next-to-next-to-next-to-leading order () zero-jettiness soft and beam functions. As a byproduct, we confirm the results for NNLO beam and soft functions available in the literature by Gaunt et al. (JHEP 4:113, 2014), Gaunt et al. (JHEP 8:20, 2014), Boughezal et al. (Phys Rev D 96:34001, 2017), Monni et al. (JHEP 8:10, 2011) and Kelley et al. (Phys Rev D 84:45022, 2011).
© The Author(s), 2020