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arXiv · 1802.00456

Next-to-leading-logarithmic power corrections for $N$-jettiness subtraction in color-singlet production

Radja Boughezal·Andrea Isgrò·Frank Petriello
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Abstract

We present a detailed derivation of the power corrections to the factorization theorem for the 0-jettiness event shape variable $\mathcal{T}$. Our calculation is performed directly in QCD without using the formalism of effective field theory. We analytically calculate the next-to-leading logarithmic power corrections for small $\mathcal{T}$ at next-to-leading order in the strong coupling constant, extending previous computations which obtained only the leading-logarithmic power corrections. We address a discrepancy in the literature between results for the leading-logarithmic power corrections to a particular definition of 0-jettiness. We present a numerical study of the power corrections in the context of their application to the $N$-jettiness subtraction method for higher-order calculations, using gluon-fusion Higgs production as an example. The inclusion of the next-to-leading-logarithmic power corrections further improves the numerical efficiency of the approach beyond the improvement obtained from the leading-logarithmic power corrections.

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Radja Boughezal, Andrea Isgrò, Frank Petriello. 2018-02-01. Next-to-leading-logarithmic power corrections for $N$-jettiness subtraction in color-singlet production. https://doi.org/10.1103/physrevd.97.076006

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