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Designing Observables for Quantum Interference in Jets at Subleading Color
by Andrew J. Larkoski
Submission summary
| Authors (as registered SciPost users): | Andrew J. Larkoski |
| Submission information | |
|---|---|
| Preprint Link: | scipost_202210_00058v2 (pdf) |
| Date accepted: | Dec. 1, 2022 |
| Date submitted: | Nov. 8, 2022, 5:40 p.m. |
| Submitted by: | Andrew J. Larkoski |
| Submitted to: | SciPost Physics |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Phenomenological |
Abstract
The large-$N_c$ or topologically planar limit of gauge theories can be considered as a classical limit because all gauge bosons are distinguishable particles and therefore cannot exhibit interference. Quantum effects due to the flow of color therefore arise starting at subleading in $1/N_c$. We introduce kinematic observables explicitly sensitive to effects at subleading color formed from the ratio of interfering to squared color-ordered amplitudes. Such observables are in general not infrared and collinear safe, so we introduce angular observables defined from appropriate multi-point energy correlators motivated by the form of color-ordered amplitudes. We demonstrate that color interference effects are manifest as sinusoidal oscillation in the simplest system, a collinear jet with three particles, and show the limitations of predicting this observable in all-purpose, leading-color parton shower Monte Carlos.
Author comments upon resubmission
Published as SciPost Phys. 14, 041 (2023)