Projects per year
Abstract
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 (CF versus CA). 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.
Original language | English |
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Article number | 91 |
Number of pages | 50 |
Journal | Journal of High Energy Physics |
Volume | 2017 |
Issue number | 7 |
DOIs | |
Publication status | Published - 1 Jul 2017 |
Keywords
- Jets
- QCD Phenomenology
Projects
- 2 Finished
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Virtual colliders: high-accuracy models for high energy physics
Australian Research Council (ARC)
1/10/14 → 18/10/19
Project: Research
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ARC Centre of Excellence for Particle Physics at the Tera-Scale
Balazs, C., Barberio, E., Bell, N., Gherghetta, T., Limosani, A., Sevior, M., Taylor, G., Thomas, A., Varvell, K., Volkas, R., Williams, A. G., Yabsley, B., Young, R. D., Clarke, A., Jakobs, C., Kruse, M., Meroni, C., Parker, M. & Trodden, M.
Australian Research Council (ARC)
1/01/11 → 31/12/18
Project: Research