Extended Modified Observable Technique for a Multi-Parametric Trilinear Gauge Coupling Estimation at LEP II

TL;DR

This paper extends the Modified Observables technique to simultaneously estimate multiple Trilinear Gauge Couplings at LEP II, demonstrating its unbiasedness and accuracy through Monte Carlo simulations for specific coupling pairs.

Contribution

It introduces an extended version of the Modified Observables method capable of multi-parameter estimation of Trilinear Gauge Couplings at LEP II.

Findings

Method is unbiased and provides consistent error estimates.

Demonstrates expected sensitivities for specific coupling pairs.

Validated through Monte Carlo experiments.

Abstract

This paper describes the extension of the Modified Observables technique in estimating simultaneously more than one Trilinear Gauge Couplings. The optimal properties, unbiasedness and consistent error estimation of this method are demonstrated by Monte Carlo experimentation using $\ell \nu jj $ four-fermion final state topologies. Emphasis is given in the determination of the expected sensitivities in estimating the $\lambda_{\gamma} - \Delta g_{1}^{z}$ and $\Delta k_{\gamma} - \Delta g_{1}^{z}$ pair of couplings with data from the 183 GeV LEPII run.