Exposing the QCD Splitting Function with CMS Open Data
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PhysRevLett.119.132003.pdf
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Author(s)
Larkoski, Andrew
Marzani, Simone
Thaler, Jesse
Tripathee, Aashish
Xue, Wei
Date Issued
September 2017
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Larkoski, Andrew et al. “Exposing the QCD Splitting Function with CMS Open Data.” Physical Review Letters 119, 13 (September 2017): 132003 © 2017 American Physical Society
Version
Final published version
Abstract
The splitting function is a universal property of quantum chromodynamics (QCD) which describes how energy is shared between partons. Despite its ubiquitous appearance in many QCD calculations, the splitting function cannot be measured directly, since it always appears multiplied by a collinear singularity factor. Recently, however, a new jet substructure observable was introduced which asymptotes to the splitting function for sufficiently high jet energies. This provides a way to expose the splitting function through jet substructure measurements at the Large Hadron Collider. In this Letter, we use public data released by the CMS experiment to study the two-prong substructure of jets and test the 1→2 splitting function of QCD. To our knowledge, this is the first ever physics analysis based on the CMS Open Data.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.119.132003
