- Tytuł:
- Systematics of quark/gluon tagging
- Autorzy:
-
Lönnblad, Leif
Soyez, Gregory
Siódmok, Andrzej
Skands, Peter
Plätzer, Simon
Larkoski, Andrew
Höche, Stefan
Thaler, Jesse
Gras, Philippe
Kar, Deepak - Opis:
- By measuring the substructure of a jet, one can assign it a "quark" or "gluon" tag. In the eikonal (double-logarithmic) limit, quark/gluon discrimination is determined solely by the color factor of the initiating parton (C F versus C A ). In this paper, we confront the challenges faced when going beyond this leading-order understanding, using both parton-shower generators and first-principles calculations to assess the impact of higher-order perturbative and nonperturbative physics. Working in the idealized context of electron-positron collisions, where one can define a proxy for quark and gluon jets based on the Lorentz structure of the production vertex, we find a fascinating interplay between perturbative shower effects and nonperturbative hadronization effects. Turning to proton-proton collisions, we highlight a core set of measurements that would constrain current uncertainties in quark/gluon tagging and improve the overall modeling of jets at the Large Hadron Collider.
- Dostawca treści:
- Repozytorium Uniwersytetu Jagiellońskiego
Artykuł