Designing Observables for Quantum Interference in Jets at Subleading Color
Abstract
The large- 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 . 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.
Keywords
Cite
@article{arxiv.2205.12375,
title = {Designing Observables for Quantum Interference in Jets at Subleading Color},
author = {Andrew J. Larkoski},
journal= {arXiv preprint arXiv:2205.12375},
year = {2023}
}
Comments
19 pages, 5 figures; v2: updated comparison to parton shower simulation; v3: title change and other minor changes, SciPost version