Year: 2025
Type: article
Abstract: We derive constraints on dimension-six light-quark dipole operators within the Standard Model (SM) effective field theory, based on measurements of Z Z production at SLC and LEP, as well as Z Z +jet production at the LHC. Our new constraints exclude the parameter space that could potentially explain the observed discrepancy between theoretical predictions and experimental data for the Lam-Tung relation. With these updated limits, we model-independently determine the maximum possible influence that beyond-SM contributions could have on the angular coefficients A_0 A 0 and A_2 A 2 , which enter the Lam-Tung relation.
Source: SciPost Physics
Authors: Rhorry Gauld, Ulrich Haisch, Joachim Weiss
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4410127841