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arXiv · 1810.05653

Investigating the Topology Dependence of Quark and Gluon Jets

Samuel Bright-Thonney·Benjamin Nachman
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Abstract

As most target final states for searches and measurements at the Large Hadron Collider have a particular quark/gluon composition, tools for distinguishing quark- from gluon-initiated jets can be very powerful. In addition to the difficulty of the classification task, quark-versus-gluon jet tagging is challenging to calibrate. The difficulty arises from the topology dependence of quark-versus-gluon jet tagging: since quarks and gluons have net quantum chromodynamic color charge while only colorless hadrons are measured, the radiation pattern inside a jet of a particular type depends on the rest of its environment. Given a definition of a quark or gluon jet, this paper studies the topology dependence of such jets in simulation. A set of phase space regions and jet substructure observables are identified for further comparative studies between generators and eventually in data.

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Samuel Bright-Thonney, Benjamin Nachman. 2019-04-13. Investigating the Topology Dependence of Quark and Gluon Jets. https://doi.org/10.1007/jhep03(2019)098

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