SciPost Submission Page
Designing Observables for Quantum Interference in Jets at Subleading Color
by Andrew J. Larkoski
This Submission thread is now published as
Submission summary
| Submission information |
| Preprint Link: |
scipost_202210_00058v2
(pdf)
|
| Date accepted: |
2022-12-01 |
| Date submitted: |
2022-11-08 17:40 |
| Submitted by: |
Larkoski, Andrew |
| Submitted to: |
SciPost Physics |
| Ontological classification |
| Academic field: |
Physics |
| Specialties: |
- High-Energy Physics - Phenomenology
|
| 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
This is the second re-submission after referee's comments. I have changed the title of the manuscript from the original as suggested by the referee.
