Professor Valentin Khoze valya.khoze@durham.ac.uk
Professor
Searching for QCD instantons at hadron colliders
Khoze, Valentin V.; Milne, Daniel L.; Spannowsky, Michael
Authors
Mr Daniel Luke Milne daniel.l.milne@durham.ac.uk
PGR Student Doctor of Philosophy
Professor Michael Spannowsky michael.spannowsky@durham.ac.uk
Professor
Abstract
QCD instantons are arguably the best motivated yet unobserved nonperturbative effects predicted by the Standard Model. A discovery and detailed study of instanton-generated processes at colliders would provide a new window into the phenomenological exploration of QCD and a vastly improved fundamental understanding of its nonperturbative dynamics. Building on the optical theorem, we numerically calculate the total instanton cross section from the elastic scattering amplitude, also including quantum effects arising from resummed perturbative exchanges between hard gluons in the initial state, thereby improving in accuracy on previous results. Although QCD instanton processes are predicted to be produced with a large scattering cross section at small center-of-mass partonic energies, discovering them at hadron colliders is a challenging task that requires dedicated search strategies. We evaluate the sensitivity of high-luminosity LHC runs, as well as low-luminosity LHC and Tevatron runs. We find that LHC low-luminosity runs in particular, which do not suffer from large pileup and trigger thresholds, show a very good sensitivity for discovering QCD instanton-generated processes.
Citation
Khoze, V. V., Milne, D. L., & Spannowsky, M. (2021). Searching for QCD instantons at hadron colliders. Physical Review D, 103(1), Article 014017. https://doi.org/10.1103/physrevd.103.014017
Journal Article Type | Article |
---|---|
Acceptance Date | Dec 1, 2020 |
Online Publication Date | Jan 19, 2021 |
Publication Date | Jan 1, 2021 |
Deposit Date | Sep 10, 2021 |
Publicly Available Date | Sep 10, 2021 |
Journal | Physical Review D |
Print ISSN | 2470-0010 |
Electronic ISSN | 2470-0029 |
Publisher | American Physical Society |
Peer Reviewed | Peer Reviewed |
Volume | 103 |
Issue | 1 |
Article Number | 014017 |
DOI | https://doi.org/10.1103/physrevd.103.014017 |
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
Advance online version Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP
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