Integrated and Differential Accuracy in Resummed Cross Sections

Abstract

Standard QCD resummation techniques provide precise predictions for the spectrum and the cumulant of a given observable. The integrated spectrum and the cumulant differ by higher-order terms which, however, can be numerically significant. In this paper we propose a method, which we call the $\sigma \text{-improved}$ scheme, to resolve this issue. It consists of two steps: (i) include higher-order terms in the spectrum to improve the agreement with the cumulant central value, and (ii) employ profile scales that encode correlations between different points to give robust uncertainty estimates for the integrated spectrum. We provide a generic algorithm for determining such profile scales, and show the application to the thrust distribution in $e^{+}{e}^{-}$ collisions at NLL${}^{\prime }$+NLO and NNLL${}^{\prime }$+NNLO.

8 pages, 8 figures

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Cited by in corpus (8)

• Joint Two-Dimensional Resummation in $q_T$ and $0$-Jettiness at NNLL
• Jet Substructure from Dark Sector Showers
• The Jet Shape at NLL${}^{\prime }$
• Drell-Yan Transverse-Momentum Spectra at N${}^3$LL${}^{\prime }$ and Approximate N${}^4$LL with SCETlib
• Double Higgs production at NNLO interfaced to parton showers in GENEVA
• Jet energy drop
• Thrust distribution in Higgs decays up to the fifth logarithmic order
• How much joint resummation do we need?