Power corrections in the N -jettiness subtraction scheme

Radja Boughezal (High Energy Physics Division, Argonne National Laboratory, Argonne, IL, 60439, U.S.A.) ; Xiaohui Liu (Department of Physics, Beijing Normal University, Beijing, 100875, China; Center of Advanced Quantum Studies, Beijing Normal University, Beijing, 100875, China; Center for High-Energy Physics, Peking University, Beijing, 100871, China; Maryland Center for Fundamental Physics, University of Maryland, College Park, MD, 20742, U.S.A.) ; Frank Petriello (Department of Physics & Astronomy, Northwestern University, Evanston, IL, 60208, U.S.A.; High Energy Physics Division, Argonne National Laboratory, Argonne, IL, 60439, U.S.A.)

We discuss the leading-logarithmic power corrections in the N -jettiness subtraction scheme for higher-order perturbative QCD calculations. We compute the next-to-leading order power corrections for an arbitrary N -jet process, and we explicitly calculate the power correction through next-to-next-to-leading order for color-singlet production for both q q ¯ $$ q\overline{q} $$ and gg initiated processes. Our results are compact and simple to implement numerically. Including the leading power correction in the N -jettiness subtraction scheme substantially improves its numerical efficiency. We discuss what features of our techniques extend to processes containing final-state jets.

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      "value": "We discuss the leading-logarithmic power corrections in the N -jettiness subtraction scheme for higher-order perturbative QCD calculations. We compute the next-to-leading order power corrections for an arbitrary N -jet process, and we explicitly calculate the power correction through next-to-next-to-leading order for color-singlet production for both q q \u00af $$ q\\overline{q} $$ and gg initiated processes. Our results are compact and simple to implement numerically. Including the leading power correction in the N -jettiness subtraction scheme substantially improves its numerical efficiency. We discuss what features of our techniques extend to processes containing final-state jets."
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Published on:
30 March 2017
Publisher:
Springer/SISSA
Published in:
Journal of High Energy Physics (2017)

DOI:
https://doi.org/10.1007/JHEP03(2017)160
arXiv:
1612.02911
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: