$WW$ scattering in a radiative electroweak symmetry breaking scenario

TL;DR

This paper develops a theoretical framework to compute $WW$ scattering amplitudes in a classically scale invariant extension of the Standard Model, predicting large deviations from SM and providing a way to test the symmetry breaking mechanism.

Contribution

It introduces a perturbative method for calculating $WW$ scattering in a CSI model and offers a more accurate approach than previous effective-potential methods.

Findings

Large deviations in $W_LW_L$ scattering cross sections from SM predictions.

Validation that scattering amplitudes satisfy the equivalence theorem.

A practical prescription for implementing predictions in Monte Carlo simulations.

Abstract

A classically scale invariant (CSI) extension of the standard model (SM) induces radiative electroweak symmetry breaking and predicts anomalously large Higgs self-interactions. Hence, $W_LW_L$ scattering processes can be a good probe of the symmetry breaking mechanism. We develop a theoretical framework for perturbative computation and calculate $WW$ scattering amplitudes in a CSI model. It is shown that $W_LW_L$ scattering amplitudes satisfy the equivalence theorem, and that a large deviation of $W_LW_L$ differential cross sections from the SM predictions is predicted depending on the c.m. energy and scattering angle. The results are more accurate than those based on the effective-potential approach. A prescription to implement predictions of the CSI model to Monte Carlo event generators is also presented.