Measurement of diboson production and precision EFT constraints in ATLAS

TL;DR

This paper reports on ATLAS measurements of diboson production at the LHC, including new evidence and limits on anomalous gauge couplings, advancing the understanding of electroweak interactions and potential new physics.

Contribution

It presents the first evidence of W+W- charge asymmetry, first measurements of CP-violation observables in WZ, and the first fully gauge-invariant anomalous neutral triple gauge coupling limits at the LHC.

Findings

First evidence of W+W- charge asymmetry

First measurement of CP-violation observables in WZ

First gauge-invariant limits on anomalous neutral triple gauge couplings

Abstract

These proceedings summarize the latest progress by the ATLAS Experiment at the LHC in measuring diboson production and related searches for physics beyond Standard Model via anomalous gauge couplings with the latest Effective Field Theory approach. The most recent measurements of $W^{+}W^{-} \to \ell^{+}\nu\ell^{-}\bar{\nu}$, $W^{\pm}Z \to 3\ell1\nu$ and $Z(\to \ell^{+}\ell^{-})\gamma$ measurements with ATLAS full Run 2 dataset are presented, along with the highlights of the first evidence of $W^{+}W^{-}$ charge asymmetry, the first measurement of CP-violation sensitive observables in $WZ$, and, for the first time at the LHC, $SU(2)_L \otimes U(1)_Y$ fully gauge invariant anomalous neutral triple gauge coupling limits with $Z(\to \ell^{+}\ell^{-})\gamma$ process.