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A complete basis of helicity operators for subleading factorization

Author(s)
Feige, Ilya; Moult, Ian; Kolodrubetz, Daniel Walter; Stewart, Iain W
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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
Date issued
2017-11
URI
http://hdl.handle.net/1721.1/114620
Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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
ISSN
1029-8479
1126-6708

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