Probing W+W-gamma Production and Anomalous Quartic Gauge Boson Couplings at the CERN LHC

TL;DR

This study assesses the LHC's ability to measure W+W-γ production and constrain anomalous quartic gauge couplings, demonstrating significant potential for testing the Standard Model and new physics with detailed simulations.

Contribution

First Monte-Carlo feasibility analysis of W+W-γ production and anomalous quartic gauge couplings at the LHC including realistic detector effects.

Findings

Observation significance of 9 sigma at 100 fb-1

Constraint on anomalous WWAA couplings at 10^{-5} GeV^{-2}

Feasibility demonstrated for probing new physics with current collider capabilities.

Abstract

Triple gauge boson associated production at the LHC serves as an interesting channel to test the robustness of the Standard Model. Any deviation from its SM prediction may indicate possible existence of relevant new physics, e.g., anomalous quartic gauge boson couplings. In this paper, a Monte-Carlo feasibility study of measuring WWA production with pure leptonic decays and probing anomalous quartic gauge-boson (e.g., WWAA) couplings, is presented in detail for the first time, with parton shower and detector simulation effects taken into account. Our results show that at the sqrt{s} = 14 TeV LHC with an integrated luminosity of 100 (30) fb-1, one can reach a significance of 9 (5) sigma to observe the SM WWA production, and can constrain at the 95% CL the anomalous WWAA coupling parameters, e.g., a_{0,c}^W/\Lambda^2 (see Ref.[15] for their definitions), at 10^{-5} GeV^{-2}, respectively.