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Constraining anomalous gluon self-interactions at the LHC: a reappraisal

  • Valentin Hirschi
  • Fabio Maltoni
  • Ioannis Tsinikos
  • Eleni Vryonidou
Open Access
Regular Article - Theoretical Physics
  • 25 Downloads

Abstract

Anomalous self-interactions of non-abelian gauge fields can be described by higher dimensional operators featuring gauge-invariant combinations of the field strengths. In the case of QCD, the gluon self-interactions start to be modified at dimension six by operators of the type GGG, with G the gluon field strength tensor, possibly leading to deviations in all observables and measurements that probe strong interactions at very small distances. In this work we consider the sensitivity to the triple gluon operator of a series of observables at the LHC in di-jet, three- and multi-jet final states and heavy-quark production. We critically re-examine the robustness of long-standing as well as more recent proposals addressing issues such as the validity of the EFT expansion and the impact of higher order QCD corrections. Our results support the conclusion that multi-jet observables can reliably bound these anomalous interactions to the level that their impact on other key observables at the LHC, involving for example top quark and Higgs production, can be safely neglected. We also highlight the potential of using previously suggested angular observables in three-jet events at the LHC to further constrain these interactions.

Keywords

Effective Field Theories Perturbative QCD 

Notes

Open Access

This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • Valentin Hirschi
    • 1
  • Fabio Maltoni
    • 2
  • Ioannis Tsinikos
    • 2
    • 3
  • Eleni Vryonidou
    • 4
  1. 1.Institute for Theoretical Physics, ETH ZürichZürichSwitzerland
  2. 2.Centre for Cosmology, Particle Physics and Phenomenology (CP3)Université catholique de LouvainLouvain-la-NeuveBelgium
  3. 3.Physik Department T31, Technische Universität MünchenGarchingGermany
  4. 4.CERN, Theoretical Physics DepartmentGeneva 23Switzerland

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