Same-sign WW Scattering in the HEFT: Discoverability vs. EFT Validity

Understand

Vector boson scatterings are fundamental processes to shed light on the nature of the electroweak symmetry breaking mechanism.

• Deviations from the Standard Model predictions on the corresponding observables can be interpreted in terms of effective field theories, that however undergo consistency conditions.
• In this paper, the same-sign W W scattering is considered within the HEFT context and the correct usage of the effective field theory approach is discussed.
• Regions of the parameters space are identified where a signal of new physics could be measured at HL-LHC with a significance of more than 5$\sigma$ and the effective field theory description is consistently adopted.