2023/11/20 by Amir Subba, Subba, Amir, Ritesh K. Singh +1
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Particle Detector Development and Performance
paper · pdf · doi:10.48550/arxiv.2311.12170
We investigate the effects of anomalous neutral triple gauge couplings in ZZ and Zγ production processes, followed by the leptonic decay of the Z boson, at a lepton collider with center-of-mass energy √(s)=250~GeV and polarized beams. We use an effective Lagrangian formalism to parameterize the anomalous couplings in terms of dimension-8 operators c_\widetildeBW, cBW, cWW, and cBB, and study the sensitivity of observables such as cross~section, polarization, and spin correlation as functions of these couplings. We perform a Bayesian statistical analysis using Markov Chain Monte Carlo methods to determine simultaneous limits on the anomalous couplings, taking into account various luminosities L ∈ \0.1~ab-1, 0.3~ab-1, 1~ab-1, 3~ab-1, 10~ab-1\ and systematic uncertainties. We find that polarization and spin correlation observables significantly enhance the sensitivity to anomalous couplings, providing stringent constraints on these couplings.