Designing observables for quantum interference in jets at subleading color

Larkoski, Andrew J.

doi:10.21468/SciPostPhys.14.3.041

Title: Designing observables for quantum interference in jets at subleading color

Journal Article · 19 March 2023 · SciPost Physics

DOI: https://doi.org/10.21468/SciPostPhys.14.3.041 · OSTI ID:1962450

Larkoski, Andrew J. ^[1]

SLAC National Accelerator Laboratory

The large-Nc 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/Nc. 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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1962450

Journal Information:: SciPost Physics, Journal Name: SciPost Physics Journal Issue: 3 Vol. 14; ISSN 2542-4653

Publisher:: Stichting SciPostCopyright Statement

Country of Publication:: Netherlands

Language:: English

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