Systematics of quark/gluon tagging

摘要: By measuring the substructure of a jet, one can assign it “quark” or “gluon” tag. In eikonal (double-logarithmic) limit, quark/gluon discrimination is determined solely by color factor initiating parton (CF versus CA). this paper, we confront challenges faced when going beyond leading-order understanding, using both parton-shower generators and first-principles calculations to assess impact higher-order perturbative nonperturbative physics. Working in idealized context electron-positron collisions, where define proxy for quark gluon jets based on Lorentz structure production vertex, find fascinating interplay between shower effects hadronization effects. Turning proton-proton highlight core set measurements that would constrain current uncertainties tagging improve overall modeling at Large Hadron Collider.