A complete basis of helicity operators for subleading factorization
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13130_2017_Article_7118.pdf
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Author(s)
Feige, Ilya
Moult, Ian
Kolodrubetz, Daniel Walter
Stewart, Iain W
Date Issued
November 2017
Journal
Journal of High Energy Physics
Publisher
Springer International Publishing AG
Citation
Feige, Ilya et al. "A complete basis of helicity operators for subleading factorization." Journal of High Energy Physics 2017 (November 2017): 142 © 2017 The Author(s)
Version
Final published version
Abstract
Factorization theorems underly our ability to make predictions for many processes involving the strong interaction. Although typically formulated at leading power, the study of factorization at subleading power is of interest both for improving the precision of calculations, as well as for understanding the all orders structure of QCD. We use the SCET helicity operator formalism to construct a complete power suppressed basis of hard scattering operators for e⁺e⁻ → dijets, e⁻p → e⁻ jet, and constrained Drell-Yan, including the first two subleading orders in the amplitude level power expansion. We analyze the field content of the jet and soft function contributions to the power suppressed cross section for e⁺e⁻ → dijet event shapes, and give results for the lowest order matching to the contributing operators. These results will be useful for studies of power corrections both in fixed order and resummed perturbation theory. Keywords: Jets; QCD Phenomenology
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP11(2017)142
