Anomalous trilinear and quartic $WW\gamma$, $WW\gamma\gamma$, $ZZ\gamma$ and $ZZ\gamma\gamma$ couplings in photon induced processes at the LHC

TL;DR

This paper explores the potential to measure and improve constraints on anomalous quartic and trilinear gauge couplings involving W and Z bosons at the LHC, using photon-induced processes and forward proton tagging.

Contribution

It introduces a novel approach to significantly enhance sensitivity to anomalous gauge couplings at the LHC through photon-induced processes and forward proton detectors.

Findings

First data at 10 pb$^{-1}$ can improve sensitivity to quartic couplings by nearly three orders of magnitude.

Photon-induced W and Z pair production can be used to probe anomalous couplings.

High luminosity measurements with forward proton taggers can further refine these constraints.

Abstract

We first report on possible measurements at the LHC using the first data and a luminosity of 10 pb$^{-1}$ of $W$ and $Z$ pair production via two-photon exchange. This measurement allows in particular to increase the present sensitivity on $WW\gamma \gamma$ and $ZZ\gamma \gamma$ quartic anomalous couplings from the LEP experiments by almost three orders of magnitude. We also discuss the possible improvements on quartic and trilinear anomalous couplings at high luminosity at the LHC using new forward proton taggers to be installed at 220 and 420 m from the CMS or ATLAS detectors.