Building blocks for subleading helicity operators
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13130_2016_Article_4022.pdf
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130036775c85b6f510ac609b38cf34a2
Author(s)
Stewart, Iain
Kolodrubetz, Daniel Walter
Moult, Ian James
Date Issued
May 2016
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Kolodrubetz, Daniel W., Ian Moult, and Iain W. Stewart. “Building Blocks for Subleading Helicity Operators.” Journal of High Energy Physics 2016.5 (2016): n. pag.
Version
Final published version
Abstract
On-shell helicity methods provide powerful tools for determining scattering amplitudes, which have a one-to-one correspondence with leading power helicity operators in the Soft-Collinear Effective Theory (SCET) away from singular regions of phase space. We show that helicity based operators are also useful for enumerating power suppressed SCET operators, which encode subleading amplitude information about singular limits. In particular, we present a complete set of scalar helicity building blocks that are valid for constructing operators at any order in the SCET power expansion. We also describe an interesting angular momentum selection rule that restricts how these building blocks can be assembled.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/JHEP05(2016)139
