Unravelling the anomalous gauge boson couplings in ZW ± production at the LHC and the role of spin-1 polarizations

Abstract

Abstract We study the anomalous triple gauge boson couplings (aTGC) in ZW ± production in 3l + channel at the LHC for s $$ \sqrt{s} $$ = 13 TeV. We use cross sections, azimuthal asymmetry, forward-backward asymmetry and polarization asymmetries of Z and reconstructed W to estimate simultaneous limits on the anomalous couplings for both effective vertex formalism as well as effective operator approach using Markov-Chain-Monte-Carlo (MCMC) method for luminosities 35.9 fb −1, 100 fb −1, 300 fb −1, 1000 fb −1 and 3000 fb −1. The trilepton invariant mass (m 3l ) and the transverse momentum of Z (p T (Z)) are found to be sensitive to the aTGC for the cross sections as well as for the asymmetries. We observed that the asymmetries significantly improve the measurement of anomalous couplings at the high-luminosity LHC if a deviation from the Standard Model (SM) is observed.

Keywords

• Beyond Standard Model
• Effective Field Theories