PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - T09 Higgs Physics
Gluon-induced diboson production in the SMEFT
A. Rossia, M. Thomas* and E. Vryonidou
Full text: pdf
Pre-published on: February 09, 2024
Published on: March 21, 2024
Precision measurements of diboson production at the LHC is an important probe of deviations from the Standard Model. The gluon-fusion channel of this process offers a connection between the Higgs and top sectors. We study in a systematic way gluon-induced diboson production in the Standard Model Effective Field Theory, with a focus on double $Z$ and associated $ZH$ production. We compute the helicity amplitudes of these processes at one loop and with up to one insertion of a dimension-6 operator and we study their high-energy limit in order to identify which operators in each channel lead to growths with energy and for which helicity configurations. In addition we perform a phenomenological study of $ZH$ production, including both quark and gluon initial states. We show that for some top operators the gluon-induced channel can offer competitive sensitivity to constraints obtained from top quark production processes.
DOI: https://doi.org/10.22323/1.449.0392
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